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40 Johnson, running rough... Using to much fuel?
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<blockquote data-quote="Pappy" data-source="post: 208505" data-attributes="member: 3278"><p>First, make sure the engine is coming up to temperature at idle. Lots of those old engines have had the thermostats removed by people thinking they were not needed. Second, make sure you have the correct plugs in the engine, a colder than normal plug will not handle excess fuel as easily as the correct plug will. Third, go ahead and adjust your idle mixture until the engine smoothes out, speeds up, and either coughs lean or slows down. Once this happens back the adjustment screw up about 1/4 - 3/8 turn and leave it there. </p><p>If your prop is worn that really kill the mileage so check it.</p></blockquote><p></p>
[QUOTE="Pappy, post: 208505, member: 3278"] First, make sure the engine is coming up to temperature at idle. Lots of those old engines have had the thermostats removed by people thinking they were not needed. Second, make sure you have the correct plugs in the engine, a colder than normal plug will not handle excess fuel as easily as the correct plug will. Third, go ahead and adjust your idle mixture until the engine smoothes out, speeds up, and either coughs lean or slows down. Once this happens back the adjustment screw up about 1/4 - 3/8 turn and leave it there. If your prop is worn that really kill the mileage so check it. [/QUOTE]
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40 Johnson, running rough... Using to much fuel?
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