How do I do a tune up on a 1989 Johnson 25HP?

gottech

Recruit
Joined
Sep 6, 2008
Messages
3
Hi all,

I am new to boating and wanted to do a tune up to my 25hp motor before I take it out for a run. What is needed and how do I do it? What fuel/oil mixture should I use? Also is it possible/practical to convert the motor from pull start to electric start? Would it be expensive?

Thanks for your help.
 

gottech

Recruit
Joined
Sep 6, 2008
Messages
3
Re: How do I do a tune up on a 1989 Johnson 25HP?

Model is J25RLCEM. I already changed the spark plugs and it ran with some back fire. I need to check the compression.
 
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