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Farmall & IHC Tractors Discussion Board

Re: Cub lo boy engine rebuild question


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Posted by K-Mo on January 29, 2011 at 16:18:31 from (67.55.164.37):

In Reply to: Cub lo boy engine rebuild question posted by BOBM25 on January 29, 2011 at 14:24:35:

What do you mean by smoked a little? Does it continue to smoke after it is fully warmed up? If you have black smoke at idle, it could mean too much fuel. Smoke from internal worn parts would be more of a blue or gray. White smoke could be moisture in the cylinder from condensation or an internal cooling system leak.
If it is a numbered series Cub, fumes coming out of the dipstick breather is normal since the engine has no other escape for the crankcase fumes. The early Farmalls and Cubs had a line from the crankcase to the Air Cleaner to suck the fumes from the crankcase and burned through the engine.
If it doesn't consume oil and has good compression, I would leave it alone. Do what you can from the outside. Tune it up and adjust the valves. I would recommend Autolite 3116 spark plugs. If you want a worry free ignition, consider installing an electronic ignition.
These are tough little engines. Many of them have been overloaded, overheated and neglected for many and still run.


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