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It runs ok up til 2500 rpm more throttle it stumble, goes bad up to 3500 rpm. From 3500 rpm to Max it runs great. The engine stuble until the boat goes to plane.
Ja det er F40 B
F 40 BET modell. Den er ok opp til 2500 rpm så snubler den, går dårlig opp til 3500rpm. Fra 3500 til maks går den utmerket. Det snubler helt til båten går i plan
Hi,
My Yamaha F40, 40 horsepower.
It idels great also more than 3500rpm full power.
It runs bad between 2400-3500rpm.
What is the problem?
Best regards
Petter
