Pull the spark plugs and spray some fogging oil into the cylinders. Let it soak then try turning the engine over by hand with the plugs out. Be sure the impeller isn't corroded to the wear ring or pump housing.....very possible if its been sitting. This will make it impossible to turn the engine, so make sure the impeller is free first.
Most likely the carbs, fuel filter and lines may be gummed with old fuel. I'd pull the carbs and clean them as a minimum. Once you get them apart, it may be evident that they need to be rebuilt.
Look for corroded electrical terminals and clean them up. Unplug and plug connectors on the harness will freshen up the contacts.
After the above, replace fuel filters, put in fresh fuel and oil, clean the plugs, new battery, then give it a try.
One big problem I see often on skis that are put away without doing any engine prep is that the rings rust and lock in the cylinders. Not a bad idea to do a compression check while you have the plugs out. That may answer some questions if it doesn't run properly.
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2008 Yamaha FX HO Cruiser
2010 Hurricane Sundeck 2100
Last edited by Ernest T; 01-03-2012 at 03:48 PM.
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