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Losing rpm after / laps.

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Losing rpm after / laps.

Old 05-07-2005, 10:53 PM
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Default Losing rpm after / laps.

Aftter I warm up the engine on the stand and launch my nitro-vee it runs great, after a lap it loses rpm and starts draging. I was thinking maybe 1/4 brass pick up tube is cooling the engine too much and not reching its normal operating temp. I check the head and it is to cool. What happens when engine is to cool? The carb also spits out alot of fuel.

Old 05-09-2005, 04:32 AM
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Default RE: Losing rpm after / laps.

Usually if an engine starts to loose RPM after running for a few min it is because it is too lean. However after reading your fault description (cool head temp and fuel spitting out the carb) I would say its too rich. Lean it 1/8th or a 1/4 of a turn and see what happens.

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