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2001 2 stroke 40hp yamaha skips under load

dieselhog

New member
"Ok yami lovers, I bought one

"Ok yami lovers, I bought one yesterday. It cranks and idles great, but when you firewall it it shudders like one cylinder is not right, after 8-10 seconds it will smooth out, but about once every 20-30 seconds, you can feel it miss on one cylinder. Guy I bought it from said it has done this since he bought it new in 01. Any ideas or common issues on these that you might share with a poor ole OMC and Mercury guy! Also is there a place to download a yamaha shop manual to find carb sync instructions etc. thanks to anyone who might help school me on this motor."
 
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