I've discovered 2 problems with my M3-20 diesel. I recently noticed oil in the bilge. The yard checked it out and said the main bearing seal is gone. Estimate is about $2K. How big of a job is this, has anyone gone thru this recently. Secondly the water pump is also on the way out and needs to be replaced. Is this something that can be obtained through Kubota or is it strictly a marine product and only obtained through Universal?? Thanks