I have replaced the front main oil seal
on my Yanmar
3JH 2CE engine
twice because there was oil
slinging all over the engine
compartment in line with crankshaft pulley.
I finally got someone small enough to crawl over the engine to get a good look at where the leak was, and discovered a small hole just to the left of the crank pulley in the gear
case. Maybe slightly smaller than a pencil eraser head
. I took a look at the other engine and no such hole. Anybody ever hear of this problem before or have experience with it? Since I only have a hole in the one engine, I am assuming that it is not some kind of breather hole....