Motorcycles, Snowmobiles, Go-Carts, ATV's and Golf Carts - 11HP Tecumseh, White Smoke??? need help.
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rperry01
08-23-08, 07:36 AM
I have this engine on a mini bike, with torc converter...
engine starts easily (no smoke), runs strong.... when motor heats up, and runs at higher RPM's.... I get alot of white smoke, especially when I runs fast then let off of the throttle... Wish I knew ??? Any ideas would be greatly appreciated... thanks in advance...
engine starts easily (no smoke), runs strong.... when motor heats up, and runs at higher RPM's.... I get alot of white smoke, especially when I runs fast then let off of the throttle... Wish I knew ??? Any ideas would be greatly appreciated... thanks in advance...
marbobj
08-23-08, 07:10 PM
White smoke is typically water being burned, but since you have an air cooled engine, I would suspect the white smoke is probably a shade of blue smoke indicative of oil burning.
As you're describing it, I would say the problem is either in worn rings, valve seals, or head gasket. Since it warms up before it starts smoking, I would lean toward rings or head gasket.
A good check would be with a compression gauge, noting the reading after turning the engine over three or four times. Then add a couple oz of 10w40 motor oil through the spark plug hole, turn the engine over a couple of times to distribute the oil in the cylinder, then check the compression again. If the reading is 10 or 15 lbs higher, the problem would definitely be in the rings. If not, suspect the head gasket.
There is a small caveat in this method, though. In a rare case you can have a good compression ring and a poor oil control ring. This is unusual, however.
As you're describing it, I would say the problem is either in worn rings, valve seals, or head gasket. Since it warms up before it starts smoking, I would lean toward rings or head gasket.
A good check would be with a compression gauge, noting the reading after turning the engine over three or four times. Then add a couple oz of 10w40 motor oil through the spark plug hole, turn the engine over a couple of times to distribute the oil in the cylinder, then check the compression again. If the reading is 10 or 15 lbs higher, the problem would definitely be in the rings. If not, suspect the head gasket.
There is a small caveat in this method, though. In a rare case you can have a good compression ring and a poor oil control ring. This is unusual, however.