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Master
3,567 Answers
- Posted on Apr 22, 2009
Re: It cuts out at high rpm but the plug is fine.
Pull the spark plug. If the porcelain cone is whitish then change the main jet to a higher number i.e.. 178 original main jet changes to a 180 or a 182 if needed.
If the porcelain cone is blackish or sooty then change to a lower number i. e. 178 down to a 175 or 172.
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