2005 yamaha 4 stroke problem

jamie hurricane

Recruit
Joined
Jul 14, 2008
Messages
1
I have a yamaha 250 4 stroke with about 60 hours that surges and almost dies. Any ideas about what is causing the problem?
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: 2005 yamaha 4 stroke problem

Sounds like a fuel or fuel delivery problem. Do you have a water separating fuel filter? If so, check for water in the fuel or change the filter. How old is the fuel. Do you regularly treat the fuel with a fuel treatment? If not, do so. A heavy dose of SeaFoam may clear things up. Check/change the engine fuel filter. Does squeezing the primer bulb help when this occurs? Does the primer bulb get sucked flat when this occurs. All signs of a fuel restriction.
 
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