The Boating Forum - hard starting 08 yamaha f250
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06-24-2012, 08:27 PM
We have a pair of 08 f250s that run fine but the port engine takes quite a bit longer to fire off when cranking.I think it may be some type of air leak on the engine itself.we have replaced all the filters fuel lines etc but it still does this when we first crank it in the mornings The bulb is tight and new also 2 different mechanics have yet to diagnose it.wondering if anyone had any similar issues. Or knew what I could check. Thanks Mark
06-25-2012, 11:42 PM
squirt some gasoline into the throttle body.
It it runs for 2-3 seconds then it is fuel related.
try replacing engine mounted threaded off fuel filter.
Remove gas filler cap for venting sys not venting.
Check fuel vacuum(Tee gage in in HG) to see if it is high vacuum ~ above 5.
Try a remote 2 to 5 gal tank..Switch fuel lines Lto R and R to L