Help Needed With 1998 Yamaha 150 VMAX 2 Stroke

Rvenegas

Recruit
Joined
Aug 23, 2020
Messages
2
I have a 1998 Yamaha 150 VMAX 2 Stroke (P150TLRW) that I am having issues with. When I’m on the water it can get on plane for a few seconds and then it bogs down. I’ve replaced both fuel pumps, cleaned the carbs twice and rebuilt them once, replaced the gas lines, replaced the spark plugs, replaced the water pump and impeller, replaced gear lube, and recently bought a 3 gallon gas tank to rule out a dirty gas tank. I’ve checked the oil levels and they are good.




When I rebuilt the carbs I removed the fuel/air screws to clean them out. Since I’ve put them back on, I’ve seated them and turned back 1.5 turns on each one. The motor is idling in range, 700-800 RPM. Yes I have the manual and no it doesn’t specify other than the RPMs.




I’m not quite sure what else it could be. Looking for any and all advice.
 

tblshur

Senior Chief Petty Officer
Joined
Aug 24, 2011
Messages
688
i would check compression and check spark with an adjustable gap spark gage and post results
 
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