Mercury 7.5 Lower Unit Leak

[baileybones]

Hello - I have a 7.5 Mercury dated around the mid 80's. I have a leak in the lower unit and it looks like it's coming thru the prop
shaft. My question is, do I have to remove the prop shaft to replace the prop seal. I have removed the prop and I don't see how
the shaft comes off. Before I go any further, I wanted to see if I even have to remove the shaft. Any help is much appreciated.

Thanks

 

[carholme]

Re: Mercury 7.5 Lower Unit Leak

What is your engine s/n? Here is a link to a mid '80s prop shaft assy and if you see item 65 which is a cover nut, this will have to be unscrewed first before pulling the bearing carrier.

http://www.crowleymarine.com/mercury-outboard/parts/297_160.cfm

But what makes you think it is the prop seal? Have you first tried replacing the very inexpensive seals, items 37/39 on the Fill/Drain plugs?

Gerry

 

[baileybones]

Re: Mercury 7.5 Lower Unit Leak

Your right. I should probably change those two seals first. Easy and inexpensive. I'll let you know if that solves the problem. Thanks
for the info and the link.

Terry