[Richiehd]

As some of you know my latest project is a 350 powered Jersey Speed Skiff.
Motor installed flywheel forward, 12 degree tilt to rear. we drive the prop off coupler attatched to the crank shaft. Motor has been slicked inside and Glyptalled to aid in oil flow back to the pan. Drain holes over cam been plugged with Moroso breather tubes. Pan Evac breather system. Here is the problem, I have an oil leak at the crankshaft sprocket, not bad but a little dribble. I have replaced the seal and checked the new sprocket hub....still leaks. I am thinking I have so much oil running down the inside of the timing cover, it leaks out the seal. Need more breather? more drainage? Any ideas fellas?

[DoubleVision]

You may want to uninstall the vented tubes you have in the drain back holes. And yes, without them some oil will make it's way to land on the crankshaft, but how much horsepower is it costing it to leave them open? Not even enough that you would notice. Since the engine is installed flywheel forward I take it that it does not use a balancer but a sprocket system as mentioned. Whatever slides on the crank hub and makes contact with the seal should be really smooth, lubed up good upon installation with no ridge cut into the surface by the seal.