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Hello, I'm your chat assistant. I have analyzed this user manual for the O.S. Engine GT15HZ. This document provides extensive instructions on safely operating the engine, including fuel recommendations, carburetor settings, silencer usage, and maintenance. I see it also emphasizes the importance of safety precautions, such as not touching hot parts and using an electric starter with proper safety gear. I'm ready to answer your questions about this engine.
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What type of fuel should I use?
Is it necessary to use a silencer?
What throttle opening is recommended for hovering?
What should I do if the engine responds sluggishly to increasing RPM?