Kohler KT17 Oil leak

[3609horse 27]

I just got a C175 with a Kohler 17 hp twin. After running for about 10 to 15 minutes it starts to spit oil out the breather tube.

I removed both valve covers and found the #1 cylinder full of oil while the other cylinder was just wet . I tried blowing out the

drain but the oil wont drain. Does anybody know why or what could be blocking the drain.

[smoreau 658]

I believe that its just a hole in the block for the engine to vent from. What have you used to clean out the hole? Just air, or a pick tool?

[3609horse 27]

I have used wire, a pick and wd40 with a long straw. when the engine is running air burps up through the hole but nothing drains. other than that the motor runs good.

when I use air it sounds clear but not as clear as the other side.

[smoreau 658]

It might be the jug gasket is int the way of the drain. How big is the hole?

[3609horse 27]

it is a little smaller than 1/4" but once you get through that it opens up. I was thinking it might be the gasket but every picture is see doesn't show a hole for the drain. It doesn't look like the motor has been apart so I thought it would rule out the gasket, I was hopeing for an easy fix.

[smoreau 658]

I have 2 417A's and a 18hp magnum, The 85 has a engine that uses oil and I get a lot of blow buy, When I take the oil cap off I get a lot of pressure coming out when its running. Also there is a mist of oil with the cap off. I am wondering if that's part of your problem. Is yours a series I or II engine? All mine are series II and all the pics in the manual don't show squat! for a drain hole. The gasket doesn't show a hole for a drain. I have a parts engine that I need to take a part some day as it has a hole in the block, Just don't have the time at the moment.