Thread: Lower unit ?

gaskets on drain and fill screws is where I would start. Maybe a prop shaft seal and shift linkage seal

Take it somewhere and have it pressure tested if it holds pressure then the screw gaskets were leaking. If it doesn't hold pressure than you know the seals are bad and need replaced. Better to do it now instead of filling it back with oil putting it back in the water and having it filled with water again. YouTube has some videos on how to pressure test it on your own if your the mechanical
type.

There are "no"' gaskets on the fill or the drain screws! I would s=assume that these are some type of rubber o-ring on the screw itself?

Originally Posted by Wade2131

There are "no"' gaskets on the fill or the drain screws! I would s=assume that these are some type of rubber o-ring on the screw itself?

My 60 hp merc has rubber O rings on the fill and drain screws

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Originally Posted by Wade2131

There are "no"' gaskets on the fill or the drain screws! I would s=assume that these are some type of rubber o-ring on the screw itself?

yes rubber "O" rings and they SHOULD be there or you'll get water in the lower unit

[QUOTE=Wade2131;3373390]There are "no"' gaskets on the fill or the drain screws! I would s=assume that these are some type of rubber o


I changed mine this week and the seal on the lower plug didn't come out with the plug. Had to remove it separate. Check up on the threads and you should see them. You'd be leaking oil if they weren't there.

If none are there that would be your problem.

Found out that the flat washers were basically in pieces and degraded, bought two new ones at basspro and pressure checked the lower unit with no air leaks (bubbles) at the shaft so it's all good ��