View Full Version : Yamaha pro 50 #3 cyl no fuel gets in but comp is good

Tony P.
04-02-2006, 11:51 AM
"My bottom cyl is dead. It has good spark but don't seem to get a charge of fuel. If you run
it for 10 mins it never fires, buy the plug is barely wet. comp is 120 on all 3 cyl. THe dealer just rebuilt the carbs. I imagine they checked the reed valves."

04-02-2006, 02:42 PM

It sounds like there is a problem in the lower carb. Maybe they everlooked something. If a reed valve is broken you should notice some pressure at the throttle bore. Hold a piece of thin paper over the bore and crank the engine. If you see the paper being pushed out, you probably have a broken reed.


04-07-2006, 01:43 AM
i would imagin something wrong in bottom carb also