wdd5885
New Member
All,
I have searched forum for answers and have drawn a blank.
I was running ski yesterday at full throttle. On my way back to marina, at full throttle, motor revved really high (as if you revved your car in neutral), ski slowed down, almost as if I had cavitation. However, once I backed off throttle, engine immediately began to run very rough. High engine vibration, almost as if the engine itself came loose from the mounts.
Limped back to marina barely above idle. Engine continued to run rough. Tried to give the ski more throttle, but engine wouldn't take it and would continue barely above idle, running rough, and if I let go of throttle, engine would die. It would crank again immediately, but only with help from the throttle. Engine vibration still high.
As I approached marina ramp, engine began to smoke. Blue smoke.
Got it home today, check plugs (good), compression (140-150 psi both cylinders). Engine not blown, whew. Ski will crank immediately. Fuel and oil are good, quantity and quality. Also, wear ring and impeller look good, but did discover stator has a large piece missing from one vane. Seems like if that piece let go, it would break away from engine into water, not be sucked up. Did check water intake line into engine, no blockage there.
Any ideas? Fuel lines have been changed, but they appear to be old. They are not gray, but black, with obvious wear and tear. If it is a blocked fuel line, would it cause the engine to smoke? This is not exhaust smoke. It comes from somewhere in the engine compartment. Thanks.
David
I have searched forum for answers and have drawn a blank.
I was running ski yesterday at full throttle. On my way back to marina, at full throttle, motor revved really high (as if you revved your car in neutral), ski slowed down, almost as if I had cavitation. However, once I backed off throttle, engine immediately began to run very rough. High engine vibration, almost as if the engine itself came loose from the mounts.
Limped back to marina barely above idle. Engine continued to run rough. Tried to give the ski more throttle, but engine wouldn't take it and would continue barely above idle, running rough, and if I let go of throttle, engine would die. It would crank again immediately, but only with help from the throttle. Engine vibration still high.
As I approached marina ramp, engine began to smoke. Blue smoke.
Got it home today, check plugs (good), compression (140-150 psi both cylinders). Engine not blown, whew. Ski will crank immediately. Fuel and oil are good, quantity and quality. Also, wear ring and impeller look good, but did discover stator has a large piece missing from one vane. Seems like if that piece let go, it would break away from engine into water, not be sucked up. Did check water intake line into engine, no blockage there.
Any ideas? Fuel lines have been changed, but they appear to be old. They are not gray, but black, with obvious wear and tear. If it is a blocked fuel line, would it cause the engine to smoke? This is not exhaust smoke. It comes from somewhere in the engine compartment. Thanks.
David
