OS.46FX trouble - RCCanada - Canada Radio Controlled Hobby Forum
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Old 09-19-2004, 10:00 PM   #1
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OS.46FX trouble

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I have an FX .46 that has a lot of time on it(4-500 flights) in a GP Ultimate. It always ran great but did suffer some overheat troubles for the very first flights due to cowl troubles.
I pancaked the plane in and damaged among other things the bison pitts muffler. Both pipes were broken off but no other viisble damage to the motor.
After the minor rebuild and replacement with the same muffler I have lost 1500 to 2000 rpm. No power at all. Have tried all the usual changing of the plug, lines etc but its getting worse.
I guess I'm wondering if thats how the motors finally croak is to run fine and then suddenly start to die or could the motor have been damaged more than whats visible?
Sounds like a stupid question but I've never owned a motor long enough to wear it out.
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Old 09-20-2004, 06:04 AM   #2
Ed Smith

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If you bounced the engine it is amazing where dirt will get in. Disassemble the engine, clean it thoroughly, look for any damage. Check for rough bearings. Especially clean out the carb fuel line connections. Engines do not suddenly die. When they wear out they go gradually. The reliable idle is usually the first to suffer.

It takes less than an hour to disassemble an engine, clean it and reassemble.

Ed s
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Old 09-25-2004, 08:04 PM   #3
Bryan Mailloux
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any small amount of dirt found in the carb after a dirt nap, is reason to at least tear apart the carb. Or at worse the engine. One gulp of sand will do major damage. Don't take the chance.
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