Powerfist 8659005 Owner's manual

V4.0 8659005

Please read and understand all instructions before use. Retain this manual for

future reference.

User Manual

Gasoline Hammer

Drill/Breaker

8659005 40 ft-lb Gasoline Jackhammer V4.0

2 For technical questions call 1-800-665-8685

SPECIFICATIONS

Engine Type 32.6cc, 2-Stroke, Single Cylinder

Fuel Tank Capacity 0.95 quarts (0.9 litres)

Fuel/Oil Ratio 25 to 1

Start Type Recoil Pull

Impact Rate 3,200 BPM

Max. Impact Energy 8.9 ft-lb

Max. Drill Speed 400 RPM

Max. Drill Bit Size 40 mm

Spark Plug (SKU 4780235) Type L6T

Gap 0.5 to 0.7 mm

Weight 23.15 lb (10.5 kg)

INTRODUCTION

The Gasoline Hammer Drill/Breaker functions both as a hammer drill and

breaker. In straight hammer mode it becomes a breaker and in drill mode

it hammers and drills. Hammer drill or break through concrete, asphalt,

masonry, stucco etc. The tool is portable and lightweight with a powerful

2-Stroke 32.6cc engine.

SAFETY

WARNING! Read and understand all instructions before using this tool. The

operator must follow basic precautions to reduce the risk of personal injury

and/or damage to the equipment.

Keep this manual for safety warnings, precautions, operating or inspection and

maintenance instructions.

Gasoline Hammer

Drill/Breaker

V4.0 40 ft-lb Gasoline Jackhammer 8659005

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HAZARD DEFINITIONS

Please familiarize yourself with the hazard notices found in this manual. A notice

is an alert that there is a possibility of property damage, injury or death if certain

instructions are not followed.

DANGER! This notice indicates an immediate and specific hazard that will

result in severe personal injury or death if the proper precautions

are not taken.

WARNING! This notice indicates a specific hazard or unsafe practice that

could result in severe personal injury or death if the proper

precautions are not taken.

CAUTION! This notice indicates a potentially hazardous situation that may result

in minor or moderate injury if proper practices are not taken.

NOTICE! This notice indicates that a specific hazard or unsafe practice will

result in equipment or property damage, but not personal injury.

WORK AREA

1. Operate in a safe work environment. Keep your work area clean, well-lit

and free of distractions.

2. Keep anyone not wearing the appropriate safety equipment away from the

work area. The tool can cause flying debris.

3. Store unused tools properly in a safe and dry location to prevent rust or

damage. Lock tools away and keep out of the reach of children.

4. Do not install or use in the presence of flammable gases, dust or liquids.

5. The tool’s exhaust is hot. Take preventative steps to avoid starting a fire

when operating outdoors in wooded or grassy area.

PERSONAL SAFETY

WARNING! Wear personal protective equipment approved by the Canadian

Standards Association (CSA) or American National Standards Institute (ANSI).

PERSONAL PROTECTIVE EQUIPMENT

1. Always wear impact safety goggles that provide front and side protection

for the eyes. Eye protection equipment should comply with CSA Z94.3-07

or ANSI Z87.1 standards based on the type of work performed.

8659005 40 ft-lb Gasoline Jackhammer V4.0

4 For technical questions call 1-800-665-8685

2. Wear the appropriate type of full-face shield in addition to safety googles,

as the work can create chips, abrasive or particulate matter.

3. Wear gloves that provide protection based on the work materials or to

reduce the effects of tool vibration.

4. Wear protective clothing designed for the work environment and tool.

5. Non-skid footwear is recommended to maintain footing and balance in the

work environment.

6. Wear steel toe footwear or steel toe caps to prevent a foot injury from

falling objects.

7. Wear the appropriate rated dust mask or respirator.

8. This tool can cause hearing damage. Wear hearing protection gear with an

appropriate Noise Reduction Rating to withstand the decibel levels.

PERSONAL PRECAUTIONS

Control the tool, personal movement and the work environment to avoid

personal injury or damage to tool.

1. Do not operate any tool when tired or under the influence of drugs, alcohol

or medications.

2. Avoid wearing clothes or jewelry that can become entangled with the

moving parts of a tool. Keep long hair covered or bound.

3. Do not overreach when operating a tool. Proper footing and balance

enables better control in unexpected situations.

4. Securely hold this tool using both hands. Using a tool with only one hand

can result in loss of control.

a. Avoid injury by using the tool’s side handle.

SPECIFIC SAFETY PRECAUTIONS

WARNING! DO NOT let comfort or familiarity with product (gained from

repeated use) replace strict adherence to the tool safety rules. If you use

this tool unsafely or incorrectly, you can suffer serious personal injury.

1. Use the correct tool for the job. This tool was designed for a specific function.

Do not modify or alter this tool or use it for an unintended purpose.

2. All users must understand the operation of all controls and learn how to

stop the engine quickly in case of emergency.

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3. Do not tamper with governor spring, links or other engine parts to increase

speed or power.

4. The engine and exhaust become very hot during operation. Severe thermal

burns can occur on contact, especially with the muffler.

a. Remove accumulated debris from the muffler. Combustible debris,

such as leaves, grass, brush, etc. can catch fire if they come in

contact with a hot engine.

b. Allow muffler, engine cylinder and fins to cool before touching.

5. The manufacturer of the equipment on which this engine is installed

specifies the top speed at which the engine will operate. DO NOT exceed

this speed.

6. Do not lean on the tool to try to create extra breaking force. The weight of

the tool itself creates the optimal breaking force to achieve high efficiency

and good results.

7. Do not use the tool to pry stones or bricks free. The tool is for drilling and

breaking work.

8. Check all the screws, nuts and bolts to make sure they are tight before

each use.

9. Do not use gasoline without mixing in two-stroke engine oil. This can

damage the engine.

10. Tighten the gas cap after refueling. Check frequently that fuel tank is not

damaged or leaking. Replace the fuel tank immediately if either problem is

discovered.

11. When using the tool in enclosed areas, such as tunnels, trenches and holes

ensure there is sufficient fresh air for the operator. Exhaust gas contains

carbon monoxide which could result in serious injury or death.

12. Leave the tool in idle for a few seconds before increasing speed or

stopping. Increasing to full throttle or stopping without idling can damage

the engine.

FUELING SAFETY

1. Mix and pour fuel outdoors in areas free of sparks and flames. Use a

container designed for fuel storage.

8659005 40 ft-lb Gasoline Jackhammer V4.0

6 For technical questions call 1-800-665-8685

2. Do not expose to any ignition source. Both the fumes and fuel are flammable.

3. Wipe up all fuel spills before starting the tool

4. Stop the engine before removing the fuel tank cap.

5. Empty the fuel tank before storing the tool. Store the saw and fuel where

fuel vapors cannot reach sparks or open flams from appliances or electrical

switches/motors.

6. Before fueling, servicing or transporting your tool, switch off the engine.

To help prevent fire, restart your chain saw at least 3 m (10 ft) from the

fueling area.

7. Allow your tool to cool before refueling.

8. Have a fire extinguisher available for immediate use. A dry chemical fire

extinguisher for Types A, B and C is suggested. Type B is required for

gasoline fires.

CARBON MONOXIDE

All gas appliances consume air (oxygen) and can produce carbon monoxide

which is toxic, has no odour and can cause death. Using a gas appliance in a

small and enclosed area can be harmful. Never use this appliance in a small and

enclosed area. Always have fresh air venting.

CARBON MONOXIDE POISONING

DANGER! Never operate a gas engine indoors or in a confined space as the

exhaust contains carbon monoxide gas. Inhalation of carbon monoxide gas

can lead to illness or death. The area must be well ventilated. Opening

windows and doors is not enough to ventilate an area.

Carbon monoxide is a colourless and odourless gas that is difficult to

detect. Carbon monoxide poisoning results from inhalation of the gas and

may be lethal if left untreated. Evacuate all people to an area with clean air

and seek immediate medical attention for any person experiencing the

following symptoms:

1. Headache

2. Confusion

3. Shortness of breath

4. Weakness

5. Chest pain

6. Dizziness

7. Vision trouble

8. Nausea and vomiting

9. Unconsciousness

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CUTTING TOOL PRECAUTIONS

1. Keep hands away from the work area and the chisel.

2. Check the cutting accessory for damage before each use. A damaged

accessory can break during use and cause serious injury.

3. Use the correct mounting hardware. The mounting hardware is designed to

hold the chisel on the tool to allow optimum performance and safety of

operation. Mismatched mounting hardware may result in a tool

malfunction and cause an injury.

4. Do not carry the tool with fingers near or on the trigger/switch.

5. Avoid unintentional starts. Be sure that the ignition switch/trigger is in the

neutral or OFF position when not in use or before connecting it to any

power source.

6. Remove adjusting keys and wrenches from the tool before operation or

connecting it to a power source. A wrench or key that is left attached to a

rotating part of the tool increases the risk of personal injury.

7. Use extra caution when making a ‘plunge cut’ into existing walls or other

blind areas. The protruding cutting accessory may cut objects that can

cause kickback, cut an electrical wire or a water pipe.

8. Do not place the tool down after use until the cutting accessory has come

to a complete stop. The cutting accessory part may not stop immediately

when the tool is turned off.

9. Do not touch the cutting accessory or the workpiece surface cut with this

tool. They may be hot and could inflict a burn injury.

DRILLING PRECAUTIONS

The term bit refers to any drill bits, router bits or tool accessories that penetrate

a material and creates a cavity through a rotary motion.

1. Never force the tool’s bit. Forcing the tool will slow down the cutting speed

of the bit, causing it to bind. Apply gentle pressure and allow the bit to do

the cutting.

2. Do not use a bit with a dull or damaged cutting edge. Keep the cutting edge

sharp and clean. A dull bit may cause the tool to skitter across the work

surface instead of penetrating the material. This may cause an injury and

will damage the workpiece.

8659005 Gasoline Hammer Drill/Breaker V4.0

8 For technical questions call 1-800-665-8685

3. Do not apply side pressure on the bit unless it is designed for such a

purpose. The bit may bind or break.

4. A loose or mismatched cutting bit may be ejected by the tool, causing an

injury to the user or a bystander. It may also fail to penetrate the material

as the point may move around under pressure, damaging the workpiece.

a. Ensure the cutting bit shank size matches the tool’s chuck or collet size.

b. Tighten the chuck or collet so the shank is tightly held with no room

to move.

VIBRATION PRECAUTIONS

1. This tool vibrates during use. Repeated or long-term exposure to vibration

may cause temporary or permanent physical injury. Take frequent breaks

when using the tool.

2. If you feel any medical symptoms related to vibrations (such as

tingling, numbness, and white or blue fingers), seek medical attention

as soon as possible.

3. Wear suitable gloves to reduce the effects of vibration.

4. DO NOT use this tool before consulting a physician if one of the following

applies:

a. Pregnant

b. Impaired blood circulation to

the hands

c. Past hand injuries

d. Nervous system disorders

e. Diabetes

f. Raynaud's Disease

UNPACKING

WARNING! Do not operate the tool if any part is missing. Replace the

missing part before operating. Failure to do so could result in a malfunction

and personal injury.

Remove the parts and accessories from the packaging and inspect for damage.

Make sure that all items in the parts list are included.

Contents:

• Pointed Chisel • 30 mm Drill Bit • Tool Kit

• Fuel Mixing Container • Grease

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IDENTIFICATION KEY

A Stop Switch

B Choke Control

C Air Filter

D Gearbox

E Gripping Sleeve

F Throttle Control

G Starter Handle

H Fuel Tank

I Fuel Tank Bracket

J Fuel Priming Bubble

K Gearbox Cover

L Bend Plate

M Selector Knob

N Handle

O Muffler

P Joint lever

Q Spark Plug

R Throttle Cable

S Gearbox Cap

T Side Handle

ASSEMBLY & INSTALLATION

Letter references in parenthesis (A) refer to the included Identification Key.

INSTALL THE SIDE HANDLE

1. Loosen the loop on the side handle (T).

2. Slide the loop over the gripping sleeve (E) onto the housing below the gearbox (D).

3. Tighten the loop enough to hold the handle in place, but to allow it to move.

4. Rotate the side handle until it is in a comfortable position that will allow

you to control the tool.

5. Tighten the loop to secure the handle.

8659005 Gasoline Hammer Drill/Breaker V4.0

10 For technical questions call 1-800-665-8685

INSTALL THE CHISEL OR DRILL BIT

1. Loosen and rotate the gripping sleeve (E) until it is wide enough to insert

the butt of the chisel or drill bit.

2. Insert the chisel or drill bit into the housing until it is seated. Apply a thin layer

of grease to the chisel or drill shank if it doesn’t slide into the housing easily.

3. Tighten the gripping sleeve until secure. Pull the chisel to confirm it is

secure in the housing.

OPERATION

PREPARING THE TOOL

1. Fill the Gearbox (D) with grease (see Lubrication).

2. Fill the fuel tank (H) with the fuel/oil mixture (see Fuel and Fueling).

3. Clean the handles of any oil or lubricants.

STARTING THE ENGINE

CAUTION! Failure to follow the steps below will result in rapid retraction of

the starter cord faster than you can let go. This will pull your hand and arm

toward the engine, possibly resulting in an injury.

Check that the Throttle Control (F) and Stop Switch (A) are functioning.

1. Before starting the tool for the first time, press repeatedly on the

transparent fuel priming bubble (J) to fully fill the carburetor with fuel.

2. Move the choke control (F) to the CLOSED position if the engine is cold.

The choke is unnecessary when starting a warm engine.

3. Lay the tool flat on the floor. Hold one handle and pull the starter handle

(G) lightly until you feel resistance, then pull the starter handle briskly. The

engine should turn over and start running.

a. Do not allow the starter handle to snap back against the engine.

Instead, return the starter grip gently by hand.

4. If the engine floods, set the choke to the OPEN/RUN position, place the

throttle (F) in FAST and attempt to start the engine again.

5. If the choke control was moved to the CLOSED position to start the engine,

gradually move it to the OPEN position as the engine warms up.

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STOPPING THE ENGINE

CAUTION! Do not choke carburetor to stop engine.

IN AN EMERGENCY

Press the red stop button (A).

DURING NORMAL USE

Stop the engine by following this procedure:

1. Move the throttle lever (F) to the MIN. position and leave to idle for 3 to 5 minutes.

2. Press the red stop button.

OPERATING THE TOOL

WARNING! Chipping and breaking concrete and stone can create stone

chips. Wear protective eyewear and clothing while using the jackhammer.

Clear the area of bystanders unless they are also wearing personal

protective equipment.

1. Use the selector knob (M) to choose between the hammer drill (Fig. 2) and

breaker functions (Fig. 3). Make sure the gas engine is shut off before

turning the knob.

2. Warm up the tool before the first use of the day or when left unused for a

time in cool temperatures. This may take several minutes.

3. Allow the engine to run at low speed for 2 to 3 minutes to preheat

the machine.

4. When the engine is warm enough, adjust the throttle to the required speed.

a. Run the tool at lower speeds for the first 24 hours of use to extend

the engine’s lifespan.

Fig. 2 Fig. 3

8659005 Gasoline Hammer Drill/Breaker V4.0

12 For technical questions call 1-800-665-8685

b. For the best results and longest engine life run the tool at a medium

speed. Do not run the tool at high speed for non-breaking applications.

5. Hold the tool by the main handle and side handle.

BREAKING

6. Place the tip against the workpiece at an angle away from yourself. This

will cause the bit to break the material apart as you move.

a. Do not hold the tool straight up-and-down as the bit will create a hole

in the material instead of breaking it apart.

7. Press the trigger (F) to start the breaker.

8. Maintain a firm grip to prevent the chisel from slipping or bouncing around

and causing an injury or unintended damage.

9. Apply just enough pressure to guide the tool. The tool’s own weight will

generate the force to break and demolish the workpiece.

10. Release the trigger when the job is complete.

DRILLING

WARNING! Immediately release the trigger if the drill bit becomes stuck or

jammed. The tool’s torque can twist your arm and cause an injury. The tool

may twist of your grip and cause an injury to yourself or a bystander.

6. Place the tip against the workpiece.

7. Press the trigger (F) to start the drill.

8. Maintain a firm grip to prevent the drill bit from slipping or bouncing

around and causing an injury or unintended damage.

9. Apply just enough pressure to guide the tool.

10. Occasionally pull the drill bit back during drilling to relieve stress on the

drill and to clear accumulated debris from the hole.

11. Stop the drill from time to time to clean the drill bit flutes of debris.

12. Release the trigger when the job is complete.

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CARE & MAINTENANCE

WARNING! Always ensure that the engine is off before you begin any

maintenance or repairs. An active engine part can cause a severe injury,

amputation or death if a mishap occurs

1. Maintain the tool with care. A tool in good condition is efficient, easier to

control and will have fewer problems.

2. Disconnect the spark plug lead and keep it away from the spark plug

during maintenance and repairs.

3. Inspect the tool components periodically. Check fuel lines, tank, cap and

fittings frequently for cracks or leaks. Repair or replace damaged or worn

components. Only use identical replacement parts when servicing.

4. Follow instructions for lubricating and changing accessories.

5. Only use accessories intended for use with this tool.

6. Keep the tool handles clean, dry and free from oil/grease at all times.

7. Maintain the tool’s labels and name plates. These carry important information.

If unreadable or missing, contact Princess Auto Ltd. for replacements.

WARNING! Only qualified service personnel should repair the tool. An

improperly repaired tool may present a hazard to the user and/or others.

FUEL AND FUELING

Warning! Always shut the engine off and allow to cool before fuelling. Never

add fuel to a machine with a running or hot engine. Move at least 10 ft. from

the refuelling site before starting the engine to avoid an explosion or fire.

The tool is equipped with a two-stroke engine that runs on a mixture of gasoline

and two-stroke oil. It is important to accurately measure the amount of oil

mixed with gasoline to ensure the correct mixture ratio. When small amounts of

fuel are mixed, even small inaccuracy can dramatically affect the ratio.

1. Use only an approved fuel container

2. Do not allow open flames, parks or smoking near fuel.

3. Fuel cans may be under pressure due to temperature. Loosen fuel caps

slowly, allowing the pressure to equilibrate.

8659005 Gasoline Hammer Drill/Breaker V4.0

14 For technical questions call 1-800-665-8685

4. Do not fill fuel tanks indoor. Always fill fuel tanks outdoors over

bare ground.

5. Inspect for fuel leaks. Do not start until leakage is repaired.

MIXING 2-STROKE FUEL

DANGER! Fuel is very flammable. Use extreme care when mixing, storing or

handling fuel. An ignition source contacting the fumes or fuel may result in

a fire or explosion and cause fatal or serious injuries.

1. Gasoline – Use 89 Octane or higher gasoline.

a. Avoid gasoline containing alcohol such as gasohol when possible.

Gasohol containing up to 10% Ethyl alcohol is acceptable if

necessary.

2. Two-stroke oil – two-stroke engine oil must meet ISO-L-EGD

(ISO/CD 13738) and JASO FC standards.

3. Do not use pre-mixed gasoline/lubricant from fuel service stations. This

includes the pre-mixed gasoline/lubricant intended for use in mopeds,

motorcycles, etc.

MIXING INSTRUCTIONS

1. Gasoline to two-stroke oil

ratio for this tool is 25 to 1.

a. A richer ratio of 20 to

1 is used for the first

20 hours of use.

2. Fill an approved container

with half of the gasoline.

3. Add the proper amount of

two-stroke oil to the gasoline per Table 1.

4. Close the container and shake to mix the oil with the gasoline.

5. Add remaining gasoline to the container, close and remix.

6. Mix in small quantities. Do not mix more fuel than can be used in a 30 day

period, 90 days if fuel stabilizer is added.

a. Fuel without an alcohol additive are less likely to form gum and

deposits and should not require a stabilizer.

Two-Stroke Oil Mixture Ratio

Fuel

First 20 hours

After 20 hours

Per Gallon

6.4 oz

5.1 oz

Per Quart

1.6 oz

1.3 oz

Per Pint

0.8 oz

0.7 oz

Per litre

50 ml

40 ml

Table 1

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HOW TO ADD FUEL

WARNING! Do not refuel the engine inside a building. Gasoline and its vapors

are extremely flammable and explosive. Keep gasoline away from appliance

pilot lights, barbecues, electric appliances, power tools, etc.

WARNING! Check for fuel leaks. If any are found, correct them before using

the saw to prevent fire or burn injury.

Do not use stale or contaminated gasoline or oil/gasoline mixture. Avoid getting

dirt or water in the fuel tank. It is normal for the engine to emit smoke during

and after the first use

1. Refuel outdoors or in a well-ventilated area.

2. Stop the engine and place it on a level surface.

3. Let engine cool at least 2 minutes before removing the fuel cap.

4. Clean the fuel cap area of dirt and debris. Remove the fuel cap slowly to

allow the pressure to equalize.

5. Check the fuel level.

6. Add fuel until it reaches the bottom of the fuel level limit marked in the fuel tank.

a. Fill the tank to approximately 1.5 in. (38 mm) below the top of the fuel

tank to allow for fuel expansion.

7. Take care to not overfill the tank. It may be necessary to lower the fuel level

depending on operating conditions.

8. Check fuel lines, tank, cap and fittings frequently for cracks or leaks.

Replace if necessary.

9. After refueling, hand-tighten the fuel tank cap securely.

10. Wipe up any spilled fuel before starting the engine or allow the fuel to

evaporate. Spilled fuel is both a fire hazard and an environmental hazard.

CARBURETOR

The gasoline/oil mixture can separate and clog the fuel line if left too long between

uses. This may cause an engine failure, if the tool is not used for more than a week.

1. Drain the fuel from the fuel tank.

2. Clean the oil out of the fuel line.

3. Refill the tank and remove the fuel line from the carburetor.

8659005 Gasoline Hammer Drill/Breaker V4.0

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4. Repeatedly press the fuel priming bubble until all the oil is flushed from

fuel line into a suitable container for disposal.

5. Reattach the fuel line to the carburetor.

CARBURETOR ADJUSTMENT

Never make adjustments to the carburetor. The carburetor was set at the factory

to operate efficiently under most conditions. Only a qualified service technician

should adjust the carburetor if it is required.

MODIFYING THE CARBURETOR FOR HIGH ALTITUDES

At high altitudes, the standard air-fuel mixture is too rich, causing increased fuel

consumption and decreased performance. A rich mixture will also foul the spark

plug and cause hard starting.

A qualified technician can improve high altitude performance with certain

modifications. Have your carburetor modified if the engine will routinely be

operated at altitudes above 5,000 ft (1,500 m). Even with carburetor

modification, engine horsepower will decrease about 3.5% for each 1,000 ft

(305 m) increase in altitude. The effect of altitude on horsepower will be greater

than this is if no modification is made.

NOTICE! When the carburetor has been modified for high altitude operation, the

air fuel mixture will be too lean for low altitude use. Operation at altitudes

below 5,000 ft (1,500 m) may cause the engine to overheat and result in serious

engine damage. When using this engine at low altitudes, have a qualified

technician return the carburetor to original factory specifications.

CLEANING THE SEDIMENT CUP

CAUTION! Wear latex or rubber gloves when working on the sediment cup.

The cup may contain fuel that will cause skin irritation. Prolonged and

repeated exposure to fuel on skin may result in dry, cracked skin.

1. Switch the fuel valve to the OFF position.

2. Remove the fuel sediment cup, screw and o-ring.

3. Clean the sediment cup with a non-flammable solvent or detergent and

rinse. Allow to dry.

a. Some chemicals will damage the o-ring material. Check for

compatibility or simply replace the o-ring.

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4. Reassemble the sediment cup and o-ring.

5. Switch the fuel valve to the ON position and check for leaks. Replace the

o-ring if the installation is correct, but fuel still leaks from the cup.

AIR FILTER

Check the air filter regularly. Dust blocking the cover of the air filter will reduce

engine power and can cause early cylinder failure. If the filter is very dirty, wash

in warm water with a mild detergent and wring dry. Once the filter is dry apply a

few drops of oil and work it into the filter. Replace the filter if it is damaged.

Replace air filter sponge after 36 hours of operation

FUEL FILTER

A clogged fuel filter will slow down an engine, causing the impact frequency and

force of the tool to also decrease.

1. Remove the fuel tank cap (H) and empty the fuel into a suitable container.

2. Pull out the fuel line with the fuel filter. A wire hook with a blunt end may

be required. Ensure that the fuel line is not punctured.

a. If unable to retrieve the fuel line and filter through the fuel tank

opening, remove the fuel tank from the tool to access the filter.

Reattach after replacing the filter.

3. Pull the spent filter off the fuel line.

4. Push the new filter onto the fuel line until the barbs are completely inserted.

5. Push the fuel line and filter back into the fuel tank. Position the fuel filter so

it is in the center of the tank where it can still draw fuel when the tool is in

different positions.

6. Pour the fuel back into the tank and replace the fuel tank cap.

REPLACING THE SPARK PLUG

NOTICE! Using an incorrect spark plug can cause engine damage. Only

replace a spark plug with a model recommended by the manufacturer.

The spark plug must be properly gapped and free of deposits for the best

performance. Check local bylaws to see if a resistor spark plug is required to

suppress ignition signals. Replace the included spark plug with a resistor spark

plug if required.

8659005 Gasoline Hammer Drill/Breaker V4.0

18 For technical questions call 1-800-665-8685

1. Remove any dirt from around the spark plug area.

2. Unclip the spark plug lead and remove the spark plug with a spark plug

wrench. This will have a rubber pad inside the socket to protect the spark

plug’s ceramic coating.

3. Inspect the spark plug. Replace it if damaged, badly fouled, the sealing

washer is in poor condition or the electrode is worn.

4. Check the gap with a spark plug gauge as

shown in Figure 4. If necessary, reset the gap

(See Specifications).

a. Correct the gap by carefully bending the

side electrode. Check the gap after each

adjustment.

5. Install the spark plug carefully by hand to avoid

cross threading.

6. Tighten the spark plug to the recommended torque until the gasket is

compressed. See Specifications for the correct torque rating.

a. Tighten an additional 1/2 to 1/3 turn more with a spark plug wrench if

the torque rating isn’t available.

7. Reconnect the spark plug lead to the spark plug.

CLEANING

WARNING! Use only a nonflammable solvent, not gasoline, to clean engine

parts. Keep all sources of ignition away from fuel related parts. Fumes are

flammable and may catch fire, causing a burn injury.

NOTICE! Do not clean the engine’s exterior with a garden hose or pressure

washer. Water can enter the engine through the air filter or muffler opening

and damage the cylinder.

1. Allow engine to cool for at least half an hour before cleaning.

2. Clean all exterior surfaces.

3. Regularly remove build-up of carbon deposits on the muffler with a wire brush.

4. Touch up any damaged paint.

5. Coat other areas that may rust with a light film of oil.

Fig. 4

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MAINTENANCE SCHEDULE

This schedule applies to normal operating conditions. If you operate your engine

under severe conditions, such as sustained high-load or high-temperature

operation or use in unusually wet or dusty conditions, consult a qualified

technician for recommendations applicable to your individual needs and use.

Regular Service Period *

Daily

Every Week

Every Month

If Damaged/

Unusable

As Needed

Performed at every indicated month or

operating hour interval, whichever comes first.

Air Cleaner Clean

X**

Replace

X

Fuel Tank / Fuel Cap Check X

Clean X

Fuel Filter Check X

Replace X

Gearbox/

Hammer Box

Clean X

Add Grease X

Fuel Tank Check X

Clean X

Fill Fuel X

Chisel/Drill Bit Sharpness X

Sharpen X

Replace X

Muffler Check X

Remove Carbon

Deposit X

Spark Plug Clean / Adjust X

Replace X

* For commercial use, log hours of operation to determine proper maintenance intervals.

** Service more frequently when used in dusty areas.

8659005 Gasoline Hammer Drill/Breaker V4.0

20 For technical questions call 1-800-665-8685

LUBRICATION

Fill the gearbox with grease before using. Use Shell Gadus S3 V220C 2 Grease

(SKU 8540627). Follow the maintenance schedule and refill the gearbox with

grease when low.

Add grease after the first 40 hours of operation.

1. Removing the gearbox cap (S) to access the gearbox.

2. Add the grease until nearly full.

3. Twist the gearbox cap back onto the gearbox.

STORAGE

DANGER! Fuel is very flammable. Use extreme care when handling or storing

fuel. An ignition source contacting the fumes or fuel may result in a fire or

explosion and cause fatal or serious injuries to you or a bystander.

When not in use for an extended period, apply a thin coat of lubricant to the

steel parts to avoid rust. Remove the lubricant before using the engine again.

Proper storage preparation is essential for keeping your engine in good condition.

The steps below will help keep rust and corrosion from impairing your engine’s

function and appearance. The engine will easier to start when used again.

Take the following precautions if storing your engine for more than 30 days.

• Store in a clean dry area.

• Change the oil while the engine is still warm.

• Clean the debris, chaff or grass from the engine’s surface.

• Drain all fuel from the fuel tank into a proper receptacle for storage.

• Disconnect the spark plug lead and cover the end with insulating tape.

Place the lead where it cannot come in contact with spark plug or the

equipment the engine is mounted on.

• Remove the spark plug. Place 1 tsp (5 ml) of oil into the spark plug hole.

• Pull starter rope slowly 8-10 times to properly coat the cylinder bore and piston

for storage. Replace spark plug and tighten. Any residual oil will burn off in

subsequent starts. This may result in white smoke emission from muffler.

• Store this engine in the horizontal position with the spark plug up. Do not

store or transport with the spark plug down.

NOTE: Storing or transporting with the spark plug down will result in hard

starting and/or engine smoking.

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Powerfist 8659005 Owner's manual

Powerfist 8659005 Owner's manual

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