hello,<br />my 150efi starts great,runs great in top speed<br />but it vibrates and rattles in idle,it seems to smooth out at 1000rpm <br />any ideas would graetly appreciated
Run a can of SeaFoam "Engine Tune" through your gas tank. This is a great decarbonizer and fuel stabilizer. It is available at NAPA auto stores. This stuff cleans everything from the tank to the exhaust. Clean her up first and see if that helps, and post back with results.
Yeah, I guess that is a bit of a drive for you. SeaFoam is basically the same as the Mercury "Quicksilver Power Tune" in a can. I would go to a Automobile Parts Store and by a Carburator/Fuel Injector cleaner that is added to your gas. Put a couple of cans in your boats gas tank and continue to use the boat as normal. I hope the cleaner will clean all of your carbs internal parts as well as carbon built up inside the motor. Anyway, do that and go put about 5 hours on the boat and post back results. Todays fuels are a buffet of crap that end up in your engine somewhere, and "SeaFoam" has helped many numerous times by breaking it up and expelling it out of the engine. I have seen spark plugs clean themselves up after a few hours of cleaner. Anyway good luck finding something...... You are not fixing one of Arafat's gun boats are you???
