Evinrude 20hp 1989 modification to 30 or 35hp

[felixthomasguy]

Hello,<br /><br />I am looking for information on how to retrofit a Envirude 20hp 1989 model CE20CRLCEM to a 30 or 35hp. I know that gearcase and motor (bore, stroke, etc) are the same for all models. Is it only the fuel system that differs? <br /><br />I want to do that because I just bought an bigger boat.<br /><br />Thank you in advance for your help.<br /><br />Félix Thomas-Guy

 

[digimortal777]

Re: Evinrude 20hp 1989 modification to 30 or 35hp

ehhhhh no<br />u cant do that , the only thing u will do is...<br />A - **** up your motor<br />B - use more feul<br />C - waste time and money<br />D - buy new pistons every month<br />E - (youll be doing this either way) Buy a new engine

 

[Johnnielund]

Re: Evinrude 20hp 1989 modification to 30 or 35hp

Hello,<br />I have a 1990 Johnson 25 hp that I bought used in July 2001. The previous owner had it converted to a 30 hp by a very reputable Johnson dealer. The parts that were changed were as follows: carburetor, intake manifold and throttle control cam. I don't know if exhaust port timming is an issue with this model. This motor powers a 16' Lund Explorer. The previous owner said the conversion made a big difference. My motor idles fine and has great top end power, however runs a little rough at around 1/3 throtle. as soon as spring comes I intend to adress this. I am happy with my converted motor. My advice would be to post this question to Joe Reeves who contributes to this message board often. Go with his answer. Good Luck.