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b83 evinfude 90 hp lower unit problem

A

aroberts

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I have an '83 Evinrude 90

I have an '83 Evinrude 90 hp and before putting the boat on the water for the first time I changed the gearcase lube. The old lube looked fine just used and old (meaning not milky and didn't feel like there was any metal particles in it). I also made sure I got both screws in tight. I decided to check how it looked a few days later and it was milky which I guess means water is in it. After looking at the exploded diagram the only place I could see where it could be leaking would be the Prop shaft seals or the big O-ring behind the Bearing carrier (assuming nothing is cracked). Would I be correct in assuming that these could be the only places that could leak and could I change these without taking off the lower unit?
 
The most common place for a le

The most common place for a leak is not the prop-shaft seals unless You have run a fish line into it.
The seal under the waterpump (vertical shaft) is more likely.
If Water in the oil: Total reseal unless You know for certain where it comes from. And do not forget the shift-rod!
 
You need to look at exploded d

You need to look at exploded diagram again! there are more places where it can leak including the o-rings on the 4 screws on the propshaft bearing carrier. Now how did you fill the gearcase ( from bottom to top I hope )and did you let it sit for a couple of days??Air mixed in when checking immediately after running will fool you.
 
"yes i filled from bottom to t

"yes i filled from bottom to top, I ran it last on Sun and I checked on Wednesday. I'm just trying to fix it before it causes more problems"
 
"A simple pressure test will t

"A simple pressure test will take away all of the guess work. You can beg, or borrow a unit, or make your own. Ditto on what you were told. I have found the seals under the waterpump to be the usual suspects. As a matter of fact, OMC used to provide those years ago in the pump kit, I don't know why they stopped."
 
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