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Posting a reply to: RE: Yamaha 115hp 4-Stroke

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hi


You are replying to:
Merc 4 Stroke
Posted 9/9/2004 12:18 AM (#117952 - in reply to #116789)
Subject: RE: Yamaha 115hp 4-Stroke


I have a 40hp Merc 4 stroke and I have found that after a few trips out when the motor idles most of the time it starts to run rough. I found that a fresh tank of gas with some seafoam in it, then run in almost wide open for about a half an hour and it will run great again for the next few trips out. I was told by a tech that these 4 stroke motors have very small jets and they are know to gum up a bit when run at slow speeds with less than fresh gas.

I hope this helps, good luck.

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