I have a 455 Apollo Jet Boat. The motor is strong and has no issues except that it leaks oil but the only after it has been run. Meaning I cannot see/find any leaks while the boat is in use, no matter how long I run it for. In addition, the leaking has never, after dozens of tests occurred during a dry land test.
The oil only appears the day after I use the boat on the water and then it is about a cup full of oil. It is very strange and has been going on for some time, like 5 seasons.
Does anyone have any ideas. I am thinking it is a weeping rear main but sometimes its does not leak at all...even after a long day on a lake.