73 135 HP EVENRUDE

J

j duke

Recruit
Joined
Jul 23, 2003
Messages
4
RECENTLY DEVELOPED SLIGHT KNOCK AT NORMAL SPEED AND SLIGHTLY LOUDER AT FULL THROTLE AFTER MY SON<br />THE BACKYARK MECHANIC ADDED SOME OCTANE BOOST TO<br />"CLEAN OUT THE CYLENDERS" . ENGINE SEEMS TO RUN OK OTHER THAN TEH KNOCK. ANY SOLUTIONS - SUGGESTIONS. WHAT ABOUT ADDING A LUBRICANT. IS AN ENGINE OF THIS AGE WORTH REBUILDING.<br /> THANKS
 
D

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: 73 135 HP EVENRUDE

It really depends on what was put in it, how much and what was not put in it (oil?). <br /><br />Start with a compression test. Then maybe a de-carbon job and hope for the best.<br /><br />Let us know the test results.<br /><br />Good luck!<br /><br />Oh -- make sure it doesnt have long reach spark plugs in it. Champion (Q)L77JC4's will work fine.
 
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