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Tech & Fab
Propane engine builds (tech, questions, advice)
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<blockquote data-quote="altfuel1991" data-source="post: 259209" data-attributes="member: 1211"><p>What is the base timing and centrifugal curve set on? Have the power mixture settings been altered? Usually when there is a stumble just off idle it is caused by an ignition problem. What kind of plugs(standard tip, platinum) and what are the gaps set at? It also is possible one of the vaporizers could be over pressurizing. You can check the pressure at the test port on the side. It should have about 1-1/2 lbs pressure when running. Anything over 2 lbs and it will try to flood the engine. Has anyone checked the lever height in the top of the vaporizers? If the problem started all at once you could have a defective vaporizer.</p></blockquote><p></p>
[QUOTE="altfuel1991, post: 259209, member: 1211"] What is the base timing and centrifugal curve set on? Have the power mixture settings been altered? Usually when there is a stumble just off idle it is caused by an ignition problem. What kind of plugs(standard tip, platinum) and what are the gaps set at? It also is possible one of the vaporizers could be over pressurizing. You can check the pressure at the test port on the side. It should have about 1-1/2 lbs pressure when running. Anything over 2 lbs and it will try to flood the engine. Has anyone checked the lever height in the top of the vaporizers? If the problem started all at once you could have a defective vaporizer. [/QUOTE]
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