I have a 1973 Ariens 10,000 series, with an 8HP HM80 Tecumseh engine. Lately I have noticed oil at the top of the head, and heater box cover where the heater box cover sits on top of the cooling fins. Could this be that the head gasket is failing ? Engine runs great, even under heavy load. I have wiped this oil down, and it reappears only after running the machine. Thoughts ?
Join Date: Jan 2017
Location: Lawrenceville NJ
I would wipe it down, use a petrol solvent, and look for where it's leaking from. Is the oil level too high? Maybe it's coming out the breather tube.
Like JLawrence suggested, what's the oil level? If you're sure it's oil and not fuel (loose sparkplug?) it's not good having oil that high up on the engine. Hopefully it is the breather. My buddy called me the other day working on a neighbors snowblower doing an oil change. Owner had filled the oil to the top of the fill neck and couldn't figure out what was wrong or why it had oil around the engine base
As this is an older machine it does use a little oil when used. I always check the oil before use though. I unscrew the dipstick, and wipe it, then re insert it, without screwing it in, and check the level. I add oil as necessary. Maybe I should be screwing the dipstick in to check the oil level? There is a difference between the dipstick screwed in, and dropped in without being screwed in, with the oil level.
If your getting oil "on top" of the cylinder head and heater box, I would make sure the oil level is correct, the dip stick tightens down and there are no cracks on the top of the filler tube. I know it sounds silly but is the spark plug tight?
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