2002 F225 4stroke- Runs fine on trailer- intermediate no start or stall in water

Richiela

Cadet
Joined
Aug 2, 2009
Messages
12
First run of the year was fine for the first 35 minutes. Came in to dock slowly and stalled at idle and would not restart. Took boat home. Inspected fuel, was a bit yellowish and cloudy. Changed Yamaha 10 micron water/fuel separator and on board paper cartridge filter. Plugs looked slighted wet, changed them for good measure. Took boat to lake, would not start at all. Took home started right up and stayed running. Changed primer bulb, drained VST, drained 40 gallons of fuel, changed F filter, Changed water separator again, added 20 gallons of fresh fuel with Blue stabil and startron. Removed air box and noticed each of the 6 throttle bodies had what looked like old fuel or fogging oil sitting in the base?? Removed and cleaned. Reinstalled air box. Boat started fine again on trailer.
Checked landyard for proper operation.
I'm I missing something? Other then the excess fuel, I'm not convinced it is a fuel related problem, Maybe ignition?
 

99yam40

Fleet Admiral
Joined
Sep 7, 2008
Messages
9,126
testing compression , spark, timing, and all fuel pressures will usually lead to where the problem is
 
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