Evinrude horsepower question- 120 140 HP

[reno1313]

I have a '91 Evinrude V4 120 HP, great long lasting engine for me. In buying some parts for it, I have noticed that the V4 140 HP in these same years uses most of the same parts- pistons, crank, etc. etc. Does anyone know what the difference is between these two engines for the additional 20 HP? Is it purely carburetor jetting?

 

[boobie]

Re: Evinrude horsepower question- 120 140 HP

If I remember it was just the carbs back then. The extra 20 hp you'll gain won't be worth the trouble. If it was 50 hp, I'd say go for it. JMHO.

 

[Faztbullet]

Re: Evinrude horsepower question- 120 140 HP

Boobie is correct as carbs where a tad larger(more cfm)