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Yamaha 90

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Roger Waugh

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I have a 1988 Yamaha 90 that m

I have a 1988 Yamaha 90 that misses under load on one cyclinder when cold. Idle is fine but over 1900 rpm and the missing starts. Usually lasts for 5 - 10 mimutes at the start of each day and then nevers does it again that day. Any ideas?
 
"Not as yet, I have recently d

"Not as yet, I have recently disconected the temp sensor on the head and the engine has not missed on the last two outings. I have ordered a new sensor - am I on the right track?"
 
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