pull the prop off bet ya have fishing line behind the prop and that has cut the seal. if thats not the cause pot the prop back on and spin it it should spin in a nice circle if it has a wouble the prop shaft is bent and that will cause the seal to leak only way for a gearcase to crack if for water to be in it and that must come threw a seal
What about the small O-ring right above the impeller? If that was bad could it leak out over time? We just replaced it last year and Im starting to think maybe it wasnt installed right and was ripped. I did check the lower gear lube after running it a few times last year and their was no water in to at that time. Also could I possibly pressure test it????
the o ring above the water pump will not cause ur leak. yes you can do a pressure test on the lower unit need to pressure it up to 20lbs and it should hold it for 10 minutes with out leaking down the other test you would want to preform is a vaccuum test the same way if it leaks on the pressure test put it in a bucket of water and watch for air bubbles. check the seal on the drain plug make sure it is there and that there is only one. they like to stick in the gear case and many people put a new one on the plug when the old one is still in place
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