I'd like to pressure test
I'd like to pressure test my lower unit. It does not sound that hard to make a little pressure gauge. But I need a fitting that will screw into the drain hole. The only recomendation I've seen is to cut the end off of a fill pump and use it. Does Anyone know what size the hole is and what the thread pattern is on a '89 40 hp Merc? }
I'd like to pressure test my lower unit. It does not sound that hard to make a little pressure gauge. But I need a fitting that will screw into the drain hole. The only recomendation I've seen is to cut the end off of a fill pump and use it. Does Anyone know what size the hole is and what the thread pattern is on a '89 40 hp Merc? }