I came across an old K&B .40 inboard. It's the ringed version with a baffle on the top of the piston. It's loop scavenged...
This engine is so old there's no mounting holes for a muffler. Just the exhaust port.
The compression is good..equivalent to a new .40, however when I start it up I get a lot of oil out the front bearing. I referred to the FAQ, and found a link which suggested checking for a stuck ring...and unsticking it so excessive blow by doesn't force oil out the front.
Wouldn't the compression suffer if the ring was stuck and not sealing??
I plan on further disassembly of the motor tonight.....and looking at the ring...but if that doesn't work, what's next??
Thanks,
Dan