Two questions (170 engine)
My bone stock 170 cu. in engine runs great and quiet up to approximately 45mph, and then has a louder resonating sound beyond that speed. By letting off the gas slightly and just feathering the throttle, the noise settles to a more tolerable roar...
Is this a sign of an exhaust restriction (have a new muffler installed) or is this just normal?
Question 2.
A short time after shutting off the (warm) engine, the garage has a strong gasoline smell which goes away after the engine cools (approx 45min-1hr.) Could this be caused by fuel in the carb boiling from the heat of the exhaust manifold sending vapors through the open air filter housing?
My bone stock 170 cu. in engine runs great and quiet up to approximately 45mph, and then has a louder resonating sound beyond that speed. By letting off the gas slightly and just feathering the throttle, the noise settles to a more tolerable roar...
Is this a sign of an exhaust restriction (have a new muffler installed) or is this just normal?
Question 2.
A short time after shutting off the (warm) engine, the garage has a strong gasoline smell which goes away after the engine cools (approx 45min-1hr.) Could this be caused by fuel in the carb boiling from the heat of the exhaust manifold sending vapors through the open air filter housing?