My Toro 518XI mower has a Kohler engine with a problem, engine Info--- Family SKH624U1G2RA,,,MODEL CH18S,,,SPEC #62579,,,DISP. 624CC,,, SER.#273241450T. It is loosing a lot of oil. I fixed a leak last year at the cover over the breather reed. Toward the end of the mowing season the top of the engine was covered with oil and the air filter is oily. I took the dip stick out while it was running and there was air pressure. Then I took the oil fill cap off and there was a lot of air being pump out of it. The engine doesn't smoke so I don't think the rings are bad and the breather reed was OK when I fixed the oil leak last year. It starts very easy and runs good. I've heard the Kohler CH18S is prone to blowing head gaskets. Would that cause the listed symptoms and if not what do you all think the problem is?
Thanks
Dana
Thanks
Dana