Please Help, 48 Cub Exhaust Smoke, Intermittent

[Bill 48 NY]

Bought a 48 Cub w/Blue (Oil)exhaust smoke and black soot on muffler cap.
Engine runs out good and has plenty of power.

Performed compression test.
Results: Dry Wet
cyl. 1 110 115
2 110 114
3 106 111
4 116 123

Cleaned Air cleaner and crankcase vent tube.
Removed valve cover, it all looked clean.
Changed oil and filter twice in 4 hrs run time.
Added Mystery oil to oil and gas each time.

Now some times it runs with very very little if any blue exhaust smoke and then it goes back to smoking (quite a bit) at others.

Any ideas this is driving me crazy???!!!!!

Thanks,
Bill

[George Willer]

Bill,

Find some hard work for it to do, at least an hour or so. You may be surprised at the improvement... at least I was!

[beaconlight]

Bill Second on what George says.

Bill

[Eugene]

3rd the opinion on working the tractor hard for a hour or two.

Perhaps some of the smoke is the results of the Mystery oil added to the gasoline. I would run the tractor about out of gas then add a fresh tank.

Good luck.

Eugene

[John *.?-!.* cub owner]

Might also try adding a can of Sea Foam to the gas.