55HP Yamaha 2cyl 2stroke 1979 stalls at full trottle

Big Pappa

Recruit
Joined
Jul 8, 2009
Messages
1
Hello,
My old outboard motor(Yamaha 663 55AE) stalls at full trottle,at idle the engine runs fine,and when i gently increase trottle it hasitates but then the engine picks up speed.
Do i need to clean the carburators? where do i begin to check?
I inspected the engine from the outside but there is no visible malfunction
. Is anyone familiair with this type of motor and this problem?
any reply is appriciated!
 
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