Yamaha Engine

The dreaded Iron Top Sail we sometimes have to rely on.....

Re: Yamaha Engine

Postby Julian Porter » Sun Dec 01, 2019 9:18 am

zimp wrote:The Yamaha 4, 5 and 6 HP are the same engines (139cc, 1cyl, 4 stroke). I suppose they make different power-ratings by different carburetors.

I spoke to the dealer about this. He said they just had different jets and that you could modify a 5hp to give higher power but it would invalidate any warranty.
Julian Porter
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