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Misfire at specific RPM with bigger carb
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<blockquote data-quote="Pappy" data-source="post: 370454" data-attributes="member: 3278"><p>Your "misfire" may be nothing more than the transition area from low to high speed circuits in the carburetor that are being aggravated by improper sync and link of your carb to ignition. This would be very typical for that engine. These settings are critical to smooth running. The other issue may be not enough propeller pitch to load the engine enough to keep it in the 2-cycle mode while running in the lower RPM range. Again, typical for an engine that has been modified to increase horsepower without going up in pitch to accommodate the new power.</p><p>Am taking for granted that you are running in the water, on a boat. Not in a test tank.</p></blockquote><p></p>
[QUOTE="Pappy, post: 370454, member: 3278"] Your "misfire" may be nothing more than the transition area from low to high speed circuits in the carburetor that are being aggravated by improper sync and link of your carb to ignition. This would be very typical for that engine. These settings are critical to smooth running. The other issue may be not enough propeller pitch to load the engine enough to keep it in the 2-cycle mode while running in the lower RPM range. Again, typical for an engine that has been modified to increase horsepower without going up in pitch to accommodate the new power. Am taking for granted that you are running in the water, on a boat. Not in a test tank. [/QUOTE]
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Misfire at specific RPM with bigger carb
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