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Engine overheating??

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Old 05-11-2009 | 02:39 AM
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Default Engine overheating??

Could a bad glow plug cause a Saito 100 to overheat??

Thanks
Old 05-11-2009 | 03:02 AM
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Default RE: Engine overheating??

Standard checks
mixture too lean
air getting into pipes
if you have it in a cowl is there any baffles in the cowl to direct the air around the engine AND sump.
is there an exit from the cowl for the hot air
Old 05-11-2009 | 06:03 PM
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Default RE: Engine overheating??


ORIGINAL: chrome350

Could a bad glow plug cause a Saito 100 to overheat??

Thanks
Bad/worn plugs usually just lead to poor performance.

The wrong heat range plug could cause hot running.
Old 05-11-2009 | 06:33 PM
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Default RE: Engine overheating??

I have never heard of it, but anything is possible. I would say lack of cooling air flow, or overly lean mixture is probaly the cause.
Old 05-11-2009 | 07:43 PM
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Default RE: Engine overheating??

all good suggestions, also how about too big of a prop? That would overheat an engine also.
Old 05-11-2009 | 09:55 PM
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Default RE: Engine overheating??

The engine is on a plane that has been flown for about 2 years. Same cowl, cooling never a problem. 15x14w apc prop, OS plug, 30% CoolPower fuel. Checked all the bolts on the engine, and the fuel lines. Tried a new gallon of fuel. Richened the needle valve. Could it be the bearings??

Thanks,
Larry
Old 05-11-2009 | 10:18 PM
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Default RE: Engine overheating??

ORIGINAL: chrome350

The engine is on a plane that has been flown for about 2 years. Same cowl, cooling never a problem. 15x14w apc prop, OS plug, 30% CoolPower fuel. Checked all the bolts on the engine, and the fuel lines. Tried a new gallon of fuel. Richened the needle valve. Could it be the bearings??

Thanks,
Larry
You might try a 15 X 4W prop and it would run cooler?

If it ran OK in the past, you may have a bad bearing?

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