Have Boat Questions? Ask a Boat Repair Expert.
Hello my name is ***** ***** am I speaking with?
Would you please post the serial number on the engine?
How does the engine run other than the idle, does it make full power under a load?
Hi Ray. Can you describe what it is doing at idle? Is it misfiring and shaking?
Hmmmm.... Lots of things can cause that. Old fouled spark plugs can do that. High fuel pressure could do that. And if there is a bad sensor on the engine that could do it as well. Have you done any kind of diagnostics on the engine?
To start, the engine would need the compression tested, spark output tested, and fuel pressure tested. Its also a good idea to run the engine off of a portable tank filled with brand new fuel to rule out any kind of fuel quality/bad gas issue. Are you able to do any of that?
Fouled plugs would do it. So start with that and let me know what happens. Do you need the correct number for the plugs?
You are very welcome Ray. I do like to hear the outcomes, so if you don't mind, let me know what the final verdict ends up being.