05 Yamaha F40 rough idle

Marv

Cadet
Joined
Jul 8, 2006
Messages
26
Re: 05 Yamaha F40 rough idle

Should not shake at idle, should be very smooth. Check your fuel lines, if it is restricting flow it will idle rough, at least my F115 does. Plug wire may also be loose, or a coil giving out.
 
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