Boston Whaler 255 Conquest Owner's manual

“The mission of Boston Whaler is

to provide consumers with the

safest, highest quality, most durable

boats in the world”

INFORMATION IN THIS PUBLICATION IS BASED ON THE LATEST PRODUCT SPECIFICATIONS AVAILABLE AT PRINTING, BOSTON WHALER

®

BOATS, INC. RESERVES THE RIGHT

TO MAKE CHANGES AT ANY TIME WITHOUT NOTICE, IN THE COLORS, EQUIPMENT, SPECIFICATIONS, MATERIALS AND PRICES OF ALL MODELS, OR TO DISCONTINUE MODELS.

SHOULD CHANGES OR MODIFICATIONS TO THE MODELS BE MADE BOSTON WHALER

®

IS NOT OBLIGATED TO MAKE SIMILAR CHANGES OR MODIFICATIONS TO MODELS

SOLD PRIOR TO THE DATE OF SUCH CHANGES. THE FOLLOWING ARE REGISTERED TRADEMARKS OF THE BRUNSWICK CORPORATION:

180 DAUNTLESS, BOSTON WHALER

®

. MRP #1808102

Rev E 10/11/05

Boston Whaler founder

Richard T. Fisher demon-

strating one of the fea-

tures that has made Bos-

ton Whaler the “Unsink-

able Legend” in this

1961 LIFE Magazine

Photo.

Richard T. Fisher was

posthumously inducted

into the National Marine

Manufacturer’s Associa-

tion (NMMA) Hall of

Fame on September 26,

1996 for accomplish-

ments made in marine

engineering and con-

struction.

History

In 1958, company founder Richard T. Fisher introduced the first Boston Whaler boat in Braintree,

Massachussetts. It featured two significant innovations: first, its twin sponson hull design produced superior

stability and a remarkably dry ride; second, its unique foam core construction made the boat not only du-

rable, but unsinkable as well.

Fisher took every opportunity to illustrate the unique characteristics of the Boston Whaler. His most famous

demonstration was captured in 1961, by Life Magazine. The series of photographs showed the boat under-

way, the boat being sawed in half and ultimately Fisher motoring away in the remaining half of the boat. And

through the years many other demonstrations have proved the toughness and durability of the Boston Whaler

hull. And though you may never cut your boat in half, this only goes to show one thing, people whose

livelihood and lives depend on boats consistently choose Boston Whaler because of their seaworthiness,

dependablility and the inherent safety of a hull that won’t sink even if severely damaged.

Boston Whalers are built to last. For over 40 years Boston Whaler® has strived to make each model better,

providing you with a safe and fun boating experience. That is the reason we offer a 10 year limited transfer-

able warranty. It is also an excellent reason why you can trust the safety of your family and friends to a

Boston Whaler.

PLEASE KEEP THIS OWNER’S MANUAL PACKET IN A SECURE PLACE, AND BE SURE TO HAND IT OVER

TO THE NEW OWNER IF YOU SELL THE BOAT.

Section 1 - 255 Conquest

Table of Contents

Section 6-Raw Waste System

Raw Water, (Optional) 26

Operation/Maintenance 26

Section 7-Livewell System

Livewell, (standard/optional) 27

Operation/Maintenance 27

Bilge Pump 27

Operation/maintenance 27

Bilge Diagram 27

Section 8-Waste System

Head System 28

Shore Side Discharge 28

Macerator/Overboard Discharge

(Optional) 28

Maintenance 29

Environmental Considerations 29

Head System w/ Macerator & Overboard Discharge 29

Vacu-Flush Waste System 29

Section 9-Propulsion System

Propeller Information 30

Propeller Assembly Diagram 30

Hydraulic Steering Information 31

Operation/Maintenance 31

Power Steering Information 31

Gear shift/Throttle Control 32

Single Engine Throttle Control 32

Dual Engine Throttle Control 32

Digital Throttle & Shift (DTS®) 32

Power Trim Operation 33

Engine Starting Procedure 33

Section 10-Getting to know your Boston Whaler

Trim Tabs 34

Mooring Points 35

Lifting 35

Hull Maintenance 36

Hull Maintenance (Blisters) 36

Bottom Painting 36

Painted Hull Care(Bottom) 37

Vinyl Cushion Care 37

Long Term Storage 37

Engine 38

Fuel System 38

Trailer Storage 38

Electrical System 38

Drainage 38

Canvas Care & Maintenance 38

Trailer 39

Trailer Safety 39

Bunk Trailer Terminology 39

Section 11-Anchoring Information

Anchoring Information 40

Lowering The Anchor 40

Setting The Anchor 40

Weighing The Anchor 40

Section 12-Maintenance Log & Notes

Maintenance Log 41

Notes 41

255 Conquest-Owner’s Manual

Section 1-255 Conquest

Introduction 1

Table of Contents 1

Construction Standards 2

Our Hull 2

Servicing your Boston Whaler 2

Hull Identification Number 2

Section 2-General Arrangement & Specifications

Specifications & Dimensions 3

Standard Features, Exterior 4

Standard Features, Interior 5

Notable Options 6

Notable Options 7

Storage 8

Standard Seating 9

Canvas Arrangement, Suntop/Hardtop 9

Through-Hull Fittings 10

Deck Occupancy 11

Label Locations 12

Section 3-Fuel System

Fuel System 13

Fuel Fill 13

Fuel System Diagram 13

Fuel Vent 13

Empty Tank 14

Hoses & Fittings 14

Tank Cleaning 14

Primer Bulb 14

Remote Oil System 14

Static Electricity and the Fuel System 15

Section 4-Electrical System

Electrical System 16

Battery Information 16

Battery Box Location 16

Battery Maintenance 16

Dual Battery Switches 17

Battery Switches, Single Engine 17

Battery Switches, Dual Engine 18

12 Volt Accessory Receptacle 18

Console Wiring Diagram 19

Hull Wiring Diagram 20

Battery Switch Diagram 20

Side Pocket Switch Panel 21

Instrument Panel

Single Engine Gauge Panel 22

Dual Engine Gauge Panel 22

Verado 4-Stroke Engine Gauge Panel 22

Multi-System Tachometer/Speedometer 23

System View Monitor 23

Navigation Lighting 24

Ignition Shutdown Switch 24

Section 5-Freshwater System

Water System 25

Freshwater Pump 25

Freshwater Shower 25

Cabin Sink 25

Freshwater System Diagram 25

Maintenance 26

Disinfecting The System 26

Winterizing The System 26

This Owner’s Manual has been written to provide specific information about your boat and it should be read carefully. Keep this booklet with the

other Manuals in the Owner’s Manual Packet. The Owner’s Manual Packet has been compiled to help you operate your boat with safety and

pleasure. It contains details of the boat, the equipment supplied or fitted, it’s systems and information on it’s operation and maintenance. Please

familiarize yourself with the boat and it’s operation before using it. If this is your first boat, or you are changing to a type of boat you are not familiar

with, for your own comfort and safety, please ensure that you obtain handling and operating experience before “assuming command” of your boat.

Your Boston Whaler® dealer or local Yacht Club will be pleased to advise you of marine safety classes and safe boating classes in your area.

Introduction

1

Section 1 - 255 Conquest

255 Conquest-Owner’s Manual

2

Hull

Identification

Number

“THE MISSION OF BOSTON WHALER IS TO PROVIDE CONSUMERS WITH THE

SAFEST, HIGHEST QUALITY, MOST DURABLE BOATS IN THE WORLD”.

We are dedicated to creating a superior product providing you with comfort, performance, safety and dependability.

All of our boats comply with the safety standards set by the United States Coast Guard and are designed, engineered

and manufactured in accordance with applicable recommendations and guidelines of the American Boat and Yacht

Council (A.B.Y.C.) and certified by the National Marine Manufacturers Association (N.M.M.A.).

Construction Standards

Hull Identifcation Number

The “Hull Identification Number” is located on the

starboard side of the transom wall.

This is the most important identifying factor and must

be included in all correspondence related to your ves-

sel. Failure to do so will only create delays. Also of

vital importance are the engine serial numbers and

part numbers when writing about or ordering parts

for your engine.

Our Hull

Boston Whaler® hulls are constructed with our pat-

ented Unibond™ construction. This involves shoot-

ing high density foam into a closed mold system.

The foam expands to fill voids in the hull, and when

the finished product is pulled from the mold, the deck

and the hull are chemically bonded to form a solid,

inseparable unit.

2

3

4

1

1 No air voids

2 High density closed cell non-absorbent foam

3 High quality resins and gelcoats

4 Woven glass matting

When your 255 Conquest needs to be serviced or

regular maintenance is needed, it should be taken to

an authorized Boston Whaler® dealer.

To find a Boston Whaler® dealer in your area call:

1-800-942-5379

Domestic/International

If a problem is not handled to your satisfaction:

Discuss any warranty related problems directly

with the service manager of the dealership or your

sales person. Give the dealership an opportunity

to help the service department resolve the matter

for you.

Servicing your Boston Whaler

Typical H.I.N. Description

Section 2 - General Arrangement & Specifications

255 Conquest-Owner’s Manual

Overall Length 26’11” 8.20 m

Trailerable Length 31’0” 9.44 m

Bridge Clearance 9’5” 2.87 m

Bridge Clearance (no top)7’3” 2.21 m

Beam 8’9” 2.74 m

Draft, (Hull Only) 16” .40 m

Weight (dry, no engine) 4900 lbs. 2222 kg

Swamped Capacity 6100 lbs 2766 kg

Maximum Engine Weight 1220 lbs. 553 kg

Maximum Weight, (passengers,

engine(s), gear,** 4300 lbs 1950 kg

Persons 14

Maximum Horsepower 450HP 335 kw

Minimum Horsepower 225 HP 167.8 kw

Fuel Capacity 150 gal.(U.S.) 567 L

Water Capacity 20 gal.(U.S.) 76 L

* Waterline

*** Engine Draft,(See Notice)

Specifications & Dimensions

3

26’11”

8’9”

7’3”

16”

9’5”

*

Specified measurements are approximations and are

subject to variance.

NOTICE

!

Note: The hard-top shown here

is for reference purposes only.

***

31’0”

NOTICE

!

Optional equipment and loading of the boat will af-

fect the draft measurements. Follow the recommen-

dations listed on your capacity plate regarding the

maximum amount of weight the boat can safely

carry.

***

24’8”

Exceeding this weight will affect the bost’s perfor-

mance. DO NOT Exceed the weights listed on the

capacity plate.

NOTICE

!

**

255 Conquest-Owner’s Manual

Section 2 - General Arrangement & Specifications4

255 Conquest

Standard Features, Exterior

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18 19

20

22

21 23 24

25

26

27

28

30

31

32

33

34

35

36

38

39

29

37

1 Bow pulpit w/ roller

2 Heavy duty rub rail

3 8” cleat bow (2), stern (2), spring (2)

4 Stainless steel bow rail

5 Forward seating area w/ cushion

6 Opening hatch w/ screen

7 Aluminum framed windshield

8 Lockable cabin door

9 Companion seating w/ cushion & slide

10 Aft facing seat w/ storage under, port

11 Self bailing cockpit

12 Fuel fill

13 Port fishbox w/ drain

14 Gunwale mounted rodholders, (2)

15 Aft foldaway seat

16 Livewell w/ drain

17 Freshwater fill

18 Port access hatch

19 Motorwell access hatch, (2)

20 Motorwell

21 Steering control lines

22 225 OptiMax Mercury Engine

23 Motorwell drains, (2)

24 Oil fill

25 Telescoping ladder access door

26 Freshwater shower nozzle

27 Transom door

28 Starboard fishbox w/ drain

29 Waste discharge deck plate

30 Aft facing seat w/ cooler under, starboard

31 Cockpit floor storage

32 Helm seat w/ cushion & slide

33 Gear shift throttle control

34 Stainless steel steering wheel

35 Hydraulic tilt steering system

36 Starboard windshield wiper

37 Forward navigation lights

38 Bow anchor locker w/ drain

39 Horn, (under pulpit)

12

255 Conquest-Owner’s Manual

Section 2 - General Arrangement & Specifications 5

255 Conquest

Standard Features, Interior

1

2

3

4

56

7

8

910

11

1314

15

16

17

1 Rodholder, Port and Starboard Cabin

2 Porta-Potti w/ Deck Pump-out

3 Molded Footrest

4 In-Deck Storage, Forward

5 150 Gal. (567L) Fuel Tank

6 Cockpit Rodholders w/ Toerail, Port & Starboard

7 Battery Switches

8 Battery Boxes, Port & Starboard

9 VRO Tank, 3 gal. (11.3L)

10 20 Gal. (76L) Freshwater Tank

11 Starboard Cabin Cushion w/ Storage Under

12 Forward Cabin Cushion w/ Storage Under

13 Port Cabin Cushion w/ Storage Under

14 V-Berth/Table Cushion & Pedestal

15 Wet Bar Sink & Faucet

16 Step To/From Cabin

17 Trim Tabs, Hydraulic

255 Conquest-Owner’s Manual

Section 2 - General Arrangement & Specifications6

Notable Options

1

2

3

4

5

78 9

10

11

12

13

14

1516 17

19

24

21

22

23

20

1 Canvas Sun-top, Red or Blue

2 Metal, Tubular Frame

3 Canvas, Forward Visor

4 Canvas, Aft Drop Curtain

5 Canvas, Side Surtain, Port & Starboard

6 Anchor Windlass

7 Radial Outriggers, Port & Starboard

8 Hard-top Electronics Box

9 Hard-top

10 Hard-top, Forward Visor

11 Hard-top Rodholders, (4)

12 Hard-top, Aluminum Frame

13 Hard-top Side Curtain, Port & Starboard

14 Hard-top, Aft Drop Curtain

15 Macerator

16 Overboard Discharge Seacock

17 Deck Pump-out Fitting

18 Waste Vent

19 Porta-Potti w/ Deck Pump-out & Overboard

Discharge

20 Holding Tank, Vacuum

21 Vacu-Flush Head

22 Shore Power Outlet

23 Shore Power Switch Panel

24 Butane Stove

6

18

4

5

6

7

8

255 Conquest-Owner’s Manual

Section 2 - General Arrangement & Specifications 7

Notable Options

1

2

3

1 AM/FM Stereo w/ CD

2 2 Speakers in Cabin, 2 in Cockpit

3 VacuFlush® Head System, (holding tank,dock-

side pump-out w/ overboard discharge).

4 Tackle Drawer, Port/Starboard

5 Cockpit Coaming Bolsters

6 Raw Water Washdown Connection

7 Gunwale Mounted Rodholders, Port/Starboard

8 Livewell w/ Light & Raw Water Fill

9 Aft Mounted Rodholder

9

10 150 CXL OptiMax Dual Engines

11 150 CXL Verado 4-Stroke Engine*

12 175 CXL Verado 4-Stroke Engine*

13 250 XXL Verado 4-Stroke Engine*

14 275 XXL Verado 4-Stroke Engine*

*These options include Digital Throttle & Shift,

Smart Craft System View Display and Power Assisted

Steering

10

11

1213

14

Section 2 - General Arrangement & Specifications8

255 Conquest-Owner’s Manual

255 Conquest Storage

7

89

10

11

12 13

14

6

1

2

3

4

5

15

1 Starboard V-berth storage

2 Cabin rod rack, starboard

3 Forward V-berth storage

4 Cabin rod racks, port

5 Port V-berth storage

6 Port side panel storage

7 Starboard side panel storage

8 Aft cockpit mechanical storage

9 Port in-deck insulated fishbox

10 Under seat storage w/ drain

11 Cockpit floor storage

12 Starboard in-deck insulated fishbox

13 Under seat, insulated cooler w/ drain

14 Anchor locker w/ drain

15 Fire extinguisher pocket

255 Conquest-Owner’s Manual

Section 2 - General Arrangement & Specifications 9

255 Conquest Standard Seating

7

8

9

10

1 Companion seat w/ cushion & slide

2 Aft facing seat, port

3 Aft foldaway seat

4 Aft facing seat, starboard

5 Helm seat w/ cushion & slide

6 Forward seating area

7 Port cabin seating w/ cushion & storage under

8 Forward cabin seating w/ cushion & storage under

9 Starboard cabin seating w/ cushion & storage

under

10 Cover & cushion over porta-potti

3

2

1

6

4

5

The sun-top canvas must be secured in can-

vas boot before trailering.

NEVER TRAILER THE CANVAS TOP IN THE

OPEN POSITION.

NOTICE

255 Conquest Canvas, Suntop/Hardtop

DANGER

CARBON MONOXIDE DANGER

Prolonged exposure can cause serious injury

or death. To reduce CARBON MONOXIDE

accumulation, increase air movement by

opening windows or adjusting the canvas to

allow for more air circulation

!

1 Aft drop curtain, (black or blue)

2 Side curtains, port & starboard, (black or blue)

3 Forward visor, (black or blue)

4 Canvas sun-top, (black or blue)

5 Aft support pole, Stainless steel

6 Forward support pole, Stainless steel

7 Aft drop curtain, (black or blue)

8 Side curtains, port & starboard, (black or blue)

9 Forward visor

10 Hard-top

11 Aluminum frame

1

2

3

4

5

6

7

8

9

10

11

255 Conquest-Owner’s Manual

Section 2 - General Arrangement & Specifications10

The deck drain provides self-bailing capabilities while the

boat is static in the water and no passengers on board.

This feature prevents the accumulation of water in the

cockpit. the drain must be in place when underway.

NOTICE

!

Depending on the type of boat you have, you may

have underwater fittings that need drain plugs.

Garboard drain plugs and fishbox drain plugs need

to be in place before the boat goes into the water.

Any fitting that will be underwater needs to be

plugged or the seacock needs to be closed

NOTICE

!

Through hull fittings should be checked for proper

seal annually. When the boat is in the water the un-

derwater fittings can be checked for dripping. It is

recommended that the underwater fittings be re-

moved, cleaned and resealed every other year.

NOTICE

!

If the through hull fittings need to be replaced, it is

recommended that an authorized Boston Whaler ®

dealer perform this type of repair. Through hull fit-

tings that are improperly installed can cause pre-

mature hull failure and may void the Boston

Whaler® limited warranty.

NOTICE

!

1 Anchor Locker Drain

2 Waste System Vent

3 Starboard Fishbox Drain

4 Raw-water Intake

5 Fishbox Pump Outlet, Starboard (optional)

6 1100 GPH Bilge Pump Outlet

7 Cabin Sink Drain

8 Fuel Vent

STARBOARD

PORT

255 Conquest Through-Hull Fittings

AFT

1

2

3465

7 8 910

11

12

15

13

14

9 Port Fishbox Drain

10 Macerator Pump Outlet, (optional)

11 Fishbox Pump Outlet, Port (optional)

12 Transom Deck & Livewell Drain

13 Motorwell Drain, (2)

14 Garboard Drain

15 Deck Drain

255 Conquest-Owner’s Manual

Section 2 - General Arrangement & Specifications 11

Be aware of your footing while the boat is underway,

slipping or falling could result in serious injury or death,

especially if the boat is in motion or in rough seas.

Keep the accomodation deck clean, so if movement

is neccessary it will be free of obstruction.

DANGER

Gelcoat surfaces are slippery when wet. Use ex-

treme caution when walking on wet surfaces.

WARNING

Deck Occupancy

WARNING

!

Never occupy the working decks while the boat is

underway.

Accomodation deck:

This area of the boat is inside the

cockpit and includes helm seating.

Movement in this area should be

done with extreme caution while the boat is under-

way. A sudden shift in boat direction can cause a loss

of balance and lead to injury or death.

Working deck:

This area is intended for occupation

ONLY while mooring, anchoring,

loading/unloading or when the boat

is at rest. NEVER operate the engine while loading

or unloading swimmers/divers from the swim plat-

form/ladder.

LABEL, DANGER CO TRANSOM

1799311

LABEL, CAUTION OIL TANK LEVEL

LABEL, PROP 65 HANG TAG

1811367

1017144

PLATE, BW-03 MAX ENG WT 1220LB/553KG

1811368

1735929

1795087

LABEL, WARNING CO CABIN

1812911

PLATE, SAFETY CANADIAN CONFORMITY BW255CQ-03

1746027

DECAL, MERC SMARTCRAFT NETWORKED

1743323

1744737

1745156

1691003

1743504

1752857

1743548

WARNING CO HELM

Section 2 - General Arrangement & Specifications12

255 Conquest-Owner’s Manual

Label Locations

5

6

3

8

11

10

15

14

1920 21

1

17

18

4

3

17

OR

16

4

12

13

ON INTERIOR SURFACE

OF CABIN DOOR

2

7

9

255 Conquest-Owner’s Manual

Section 3 - Fuel System 13

The 255 Conquest is equipped with a

gasoline fuel system. Please take time

to read and understand all the fuel re-

lated information and warnings in the

engine owner’s packet. The diagrams

below show the location of the fuel fill, routing of

fuel supply hose and the location of the fuel tank

vent.

GENERAL

FUEL,

1

2

3

4

6

7

5

8

Fuel Fill

The 255 Conquest fuel fill is located in the port side

of the gunwale, it is marked “GAS”, and is opened

by use of a special key that is included with the

owner’s manual packet.

Follow the engine manufacturer’s recommendation

for the types of fuel and oil to use.

Fuel Vent

The fuel tank has a fuel tank vent located amidship,

7-9” inches below the rub rail directly below the fuel

fill caps. The fuel tank vent serves as a pressure/

vacuum release, safety overflow and flame arrestor.

Access to the vent fitting is through twist-out plate

located inside the cockpit opposite the fuel tank vent.

Check the vent assembly regularily as part of a main-

tenance schedule for continued safe operation of your

boats fuel system. The Vent assembly consists of a

255 Conquest Fuel System Diagram

1 Fuel fill plate (port side gunwale)

2 1.5” fuel fill hose

3 Fuel vent

4 150 Gal.(567.75L) polyethylene fuel tank.

5 Ground wire to forward buss bar

6 Fuel supply line to engine.

7 Fuel supply (to optional engine)

8 3 Gal. (11.4 L) Remote oil system tank

Fuel System

CAUTION

!

Leaking fuel is a fire and explosion hazard, inspect the

system regularly. Examine fuel tanks and exposed lines

for leaks and corrosion.

DANGER

!

Check for leaks in tubing, connections and hoses. Cor-

rect the cause of the leaks and ventilate the area to

insure that no fumes remain, prior to energizing any

electrical equipment and/or starting the engines.

CAUTION

!

Use of improper gasolines can damage your engine se-

riously. Engine damage resulting from use of improper

gasoline is considered misuse of engine and will void

the warranty. Follow engine manufacturer’s recommen-

dations regarding the types of fuel and oil to use.

CAUTION

!

Oil and fuel spills can be dangerous and can subject

offenders to severe penalties

NOTICE

!

Remove portable tanks from boat and fill from shore.

When fueling is complete, secure tanks to deck with

straps provided.

DANGER

!

Static electricity can ignite gasoline vapors causing

serious injury/death and/or destruction of property.

NOTICE

!

Fuel tanks should never be filled to capacity, allow 2%

for expansion.

Section 3 - Fuel System14

255 Conquest-Owner’s Manual

backshell, starwasher, nut and hose clamp. Remove

the hose clamp, nut, starwasher and backshell and

push the fuel vent fitting out. The fuel vent has four

screens that are held in by a ring. Use a small pick to

dislodge the ring to remove the screens and clean as

required.

EMPTY TANK:

A fuel tank with levels less than 1/4 full can cause

problems by stalling an engine due to fuel starvation

or by allowing sediment and dirt to enter the fuel

supply lines. Keeping the tank filled will reduce the

chance of this occurance; since the residue will most

likely settle to the bottom of the tank. Monitor the

fuel level often to prevent this from happening.

HOSES AND FITTINGS:

Hoses and fittings should be inspected at least every

100 hours. Check the hoses for cracks, abrasions and

deterioration and the strong smell of fuel prior to

starting the engine(s). If the hoses or fittings are dam-

aged or worn, replace them with only marine grade

replacement parts. Your authorized Boston Whaler®

dealer will have all the parts information you will

need.

TANK CLEANING:

Excessive water and sediment may force you to con-

sider having the tank professionally cleaned. If you

are frequently changing fuel filter/water separators

and notice a loss in power, consult a professional

tank cleaning contractor regarding this procedure and

proper disposal of residue and water.

PRIMER BULB:

There is a primer bulb that can be accessed in the

portside of the motorwell. There are also instructions

regarding proper use of the primer bulb. The primer

bulb is used to draw fuel from the tank to the engine,

usually after the fuel has been drained from the en-

tire system.

Remote Oil System

The 255 Conquest is equipped with a remote oil sys-

tem. This system consists of a single 3- Gal.(11.3L)

reservoir tank and hoses which contain and meter

lubricating oil to the engine. There is a second tank

added when the dual engine option is used. The tank

has an external fill located on the aft side of the cock-

pit transom wall. Access to the tank can be reached

through the motorwell access hatch. When recapping

the fill make sure that it is secure to prevent spills

and to prevent the intrusion of water into the system.

Your remote oil tank is secured by a nylon strap and

quick release clip. Little maintenance is required for

the remote oil system, aside from checking the hoses

for abrasions and cracks and hose clamps for proper

tightness. The tank should not be exposed to ultra-

violet light, rain or seawater for extended periods of

time.

(3) gallon remote

oil tank location

Oil fill

(to deck)

Engine supply

Hull

mounted

fuel vent

with screen

To Engine

Primer

bulb (Port side)

255 Conquest-Owner’s Manual

Section 3 - Fuel System 15

There is a danger that static electricity can ignite gaso-

line vapors that have not been ventilated outside an

enclosed area. Use extreme caution when fueling

your boat from a source outside the regular venues,

(e.g. marinas, fuel service stations.)

Your boat has safety features that can be circum-

vented by not adhering to standard fueling practices.

Your boats bonding system protects it from creating

and discharging static electricity.

Your boat must be in contact with the water or a land

based grounding system. Here are some helpful sug-

gestions to keep you safe from static electricity while

refueling your boat.

• NEVER fuel your boat in unsafe conditions such

as: suspended on a sling or in a situation that in-

creases the likelihood of static discharge.

• NEVER use homemade containers to fill your fuel

tanks.

• Fuel carried on-board outside of a fixed fuel sys-

tem should be stored in an approved container or

in a portable tank such as provided for outboard

engines and be stowed safely outside of the engine

or living compartment(s).

• Shut down the engine(s), motors and fans prior to

taking on fuel. Any ignition sources should be ex-

tinguished before filling the fuel tank(s).

• Close all ports, windows, doors and hatches.

• Fueling should never be done at night except in

well-lighted areas.

• Always keep the fuel nozzle in contact with the

fuel fill plate or the edge of the fuel tank opening

throughout the filling process.

• Allow areas where gasoline vapors could collect

to be ventilated before starting the engine(s).

• Wipe any spillage completely and dispose of rags

or waste on shore.

• Secure the fill cap tightly.

• Fuel tanks should never be filled to capacity. al-

low 2% for expansion.

• Portable tanks should only be filled while on the

ground; never on-board the boat.

Static Electricity and the Fuel System

Section 4 - Electrical System16

255 Conquest-Owner’s Manual

Electrical System

Battery Information

Your 255 Conquest is equipped with

an electrical system that provides

power for the following:

• Engine ignition

• Engine tilt trim system

• Helm switch panel & helm instrument panel

• Lighting/Navigation system

• Livewell system

• Add-on accessories and electronics

The system consists of the following components:

• Battery boxes, (2 standard)

• Dual Battery switches

• Main & Branch circuit breakers

• Helm Ignition, Switch & Instrument Panel

BATTERY

-

+

BATTERY BOX LOCATION:

The battery boxes are located under the aft cockpit

hatch. Batteries should always be enclosed in the cov-

ered battery boxes provided with your boat. The box

will contain any spilled acid, as well as protect the

battery terminals from damage or inadvertant short-

ing from coming in contact with metal objects. Each

battery box should always be secured in place by us-

ing the straps and clamps provided, the straps will

ensure that while underway the battery will not move

around, causing damage to components stored in the

same area.

Battery Maintenance

Battery maintenance should include:

• Inspect each battery and charging system be-

fore use; for loose connections or wiring.

• Coat the terminals with dielectric grease.

• Keep the batteries dry.

• Remove the batteries from the boat during cold

weather or long term storage.

The most life shortening experience for the battery

is to be drained to zero charge before recharging.

When a battery discharges, the active material on both

positive and negative plates converts to lead sulfate,

causing the plates to become more alike in an elec-

trical charge. The electricity conducting battery acid

becomes weaker and the voltage drops. As the bat-

tery remains discharged, the process continues until

recharging the battery becomes impossible.

Battery Box

Release Strap

Tie-down

strap

Never reset a breaker without first determining and

correcting the cause of the trip. Should a circuit re-

peatedly trip, have a qualified electrician determine and

correct the cause.

• Never use an open flame in the battery storage area.

• Avoid striking sparks near the battery

• A battery will explode if a flame or spark ignites

the free hydrogen given off during charging.

• The battery should always be disconnected before doing

any work or maintenance on the electrical system.

If equipped with a battery switch, you will need to stop

the engine before moving the switch to the “OFF” posi-

tion.

Batteries contain sulfuric acid which is dangerous and

can cause serious injury.AVOID contact with skin, eyes

and clothing. If contact occurs, immediately flush the

affected area with large quantities of water and call

for medical assistance.

Always store the battery in the the battery box. Use the

straps and clamp to keep the box secure while under-

way.

CAUTION

DANGER

NOTICE

!

ALL

2

1

OFF

Section 4 - Electrical System

255 Conquest-Owner’s Manual

17

Your 255 Conquest uses a pair of battery selector

switches to control delivery of DC power from two

batteries. The battery switches are located on the

starboard bulkhead in the aft cockpit compartment.

The dual battery switch has four (4) settings:

• “OFF”, you will have no power to the

engine(s).

• “ALL”, you will have power from both bat-

teries at the same time. This parallels the bat-

teries to assist you in starting the engine(s),

once the engine is started the battery switch

should be taken off of the “ALL” setting, and

set to charge either battery .

• “1”, you will have power from the port bat-

tery only.

• “2”, you will have power from the starboard

battery only.

When the engine is shut down or not providing a

charge, the system will allow isolation of the star-

board (house) battery. This will allow you to run all

the boats functions without affecting the port bat-

tery. You can run the house battery flat and still start

the engine.

Dual Battery Switches

Selector Knob

“Battery 1”

Selection

“Battery 2”

Selection

Batteries

“OFF”

Selection

Batteries

“ALL”

Selection

Battery

Selector

Switches

ALL

2

1

OFF

Single Engine

Installation

Both batteries un-con-

nected, Preferred position

when boat is not in use.

ALL

2

1

OFF

Normal position while

engaging in normal en-

gine operations.

ALL

2

1

OFF

To parallel batteries, set

switch to the “ALL” posi-

tion, return to normal op-

erating positions after

starting.

Use this position only if both batteries are near the

same voltage. If one battery is strong and the other

weak, high current could cause battery damage.

WARNING

!

Section 4 - Electrical System18

255 Conquest-Owner’s Manual

Dual Engine Installation

Both batteries un-connected, Preferred position

when boat is not in use.

PORT

ENGINE

STARBOARD

ENGINE

ALL

2

1

OFF

ALL

2

1

OFF

ALL

2

1

OFF

ALL

2

1

OFF

Normal position while engaging in normal engine

operations.

ALL

2

1

OFF

ALL

2

1

OFF

To parallel batteries, set both switches to the

“ALL” position, return to normal operating posi-

tions after starting.

Do not operate boat with batteries in parallel, seri-

ous engine electrical damage may result.

WARNING

Bilge pump still draws power from the batteries,

even if the switches are set to “OFF”.

WARNING

12 Volt Accessory Receptacle

Your 255 Conquest is equipped with a 12 volt acces-

sory receptacle located on the side pocket switch

panel. It is a DC (cigarette lighter) style receptacle

to be used with any 12 volt accessories using this

type of plug. The receptacle is made of corrosion re-

sistant marine grade materials and has a moisture

proof cap. There is a 10 amp breaker button located

just above the receptacle. Be sure to use accesso-

ries that do not exceed the rated capacity of the

circuit, (10 amps) or the breaker will trip.

12V Accessory

receptacle

!

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Boston Whaler 255 Conquest Owner's manual

Boston Whaler 255 Conquest Owner's manual

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