Honda 8hp upgrade

[argylle]

I just bought a four year old Honda 8hp and noticed that the cubic capacity ,bore and stroke is identical to the 9.9hp. The difference appears to be that the 8hp peaks at 5000rpm and the 9.9hp around 5500rpm. Does this mean its simple to squeeze some extra horses out of the 8hp ? <br />If so, how is it done ?

 

[45_red]

Re: Honda 8hp upgrade

I don't have a manual or parts list for the newer ones but possible differences would be the carb,exhaust valve timing and ignition timing. If you could find a 9.9 with a blown powerhead and swap parts might work.

 

[argylle]

Re: Honda 8hp upgrade

Thanks for that, I 'll try to find a 9.9 manual ans sneak a look