I've got a 1961 OC46-3D that has a small but stead stream of smoke coming out the crankcase vent at the top of the motor. White smoke. Smokes a bit out of the exhaust when it's cold but that pretty much goes away when it warms up. Always out the crankcase vent though. Thought maybe there was too much oil in it but I just changed it and put 5 qts exactly in, same thing. Engine sounds good, just smokes a bit. Should I be worried?
I should also mention the oil pressure gauge is pegged all the way past the highest green part.... going to track down another gauge to verify.
A little smoke out the breather is not uncommon for an old engine. If the engine runs well I would not be to concerned about it. That engine takes 5 qts on an oil change, 6 if the filter is changed as well. I would be concern about not having a working oil pressure gauge!! I would get that fixed soon to be sure you have some!!
I would be surprised if it didn't have a little blow by at it's age. I doubt there are many new engines that don't have some blow by, but they just suck it back into the intake via their positive crankcase ventilation system.
How much do you use the tractor? How does it start?
Thanks guys. The new gauge should be here tomorrow so we'll see what that says. Motor seems to have good power. I don't really use the tractor all that much, just drag a few logs out of the woods. It's a little slow to start and needs a good shot of starter fluid to get going.
Has the tractor sat for a long time at some point in it's life?? If so it may have some stuck rings which will contribute to the smoke and hard starting. Some may free up with use.