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OS. 18TM leaking FB

Old 09-15-2007, 11:18 PM
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Default OS. 18TM leaking FB

i have a OS .18tm on my revo, i consider this engine new it only has half a gallon through it. i have been noticing that there is fuel under the engine on the front, below the flywheel, when i took the engine off there was fuel on the engine mount.

what do I do, its got to be a front bearing leak? nothing else is leaking on my engine
Old 09-17-2007, 10:08 AM
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Default RE: OS. 18TM leaking FB

It is normal for some fuel to come out through the front bearing. You should notice a "stripe" under the flywheel on the chassis, and above, on the inside of the body. This fuel is what lubricates the front bearing. If the inside of the car is becoming loaded with raw fuel, and you are sure it's from the front bearing, then the cranshaft to crankcase fit is worn out. The bearing does not provide the seal. The seal is made by a close fit of the crank to the case between the carb and front bearing.

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