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57 Johnson 18hp rebuild questions
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<blockquote data-quote="Pappy" data-source="post: 229562" data-attributes="member: 3278"><p>There is no idle adjustment on that handle. </p><p>As far as I can read, the only issue you are having is from the hub in your propeller. </p><p>Take your prop to a dealer and have them send it off to be re-hubbed. You will then have your top end performance back. You are definitely on borrowed time with that prop if you leave it as is. </p><p>You should be running no less than 24: fuel/oil mix in that engine, are you? Those engines are non-replaceable and should be run on nothing but the proper mix. </p><p>You never mentioned what your current compression is on the damaged cylinder. The mark at the edge of the piston may be indicative of a broken ring that caught a port, broke, and got caught between the combustion chamber and the piston before exiting the exhaust ports. What is your current compression on that cylinder?</p></blockquote><p></p>
[QUOTE="Pappy, post: 229562, member: 3278"] There is no idle adjustment on that handle. As far as I can read, the only issue you are having is from the hub in your propeller. Take your prop to a dealer and have them send it off to be re-hubbed. You will then have your top end performance back. You are definitely on borrowed time with that prop if you leave it as is. You should be running no less than 24: fuel/oil mix in that engine, are you? Those engines are non-replaceable and should be run on nothing but the proper mix. You never mentioned what your current compression is on the damaged cylinder. The mark at the edge of the piston may be indicative of a broken ring that caught a port, broke, and got caught between the combustion chamber and the piston before exiting the exhaust ports. What is your current compression on that cylinder? [/QUOTE]
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