lower unit drain plug gasket not completely sealing

adg

Petty Officer 3rd Class
Joined
May 26, 2012
Messages
76
I have bought new drainplugs/gaskets and changed LU oil on my johnson 250 - it is a dark grey paper type gasket that came in the kit - but it seems not to be 100% sealing, very very little oil is running from the lower drain plug - is it so that this paper like gasket must absorb a bit oil during some days so it becomes 100% tight? Or must I change the gasket? I tried to tighten the screw but feel it is tight enough.

For info; the drain plugs that were in had white nylon/plastic washers.
 
Last edited:

Vic.S

Rear Admiral
Joined
May 4, 2004
Messages
4,690
Re: lower unit drain plug gasket not completely sealing

It is important that they do not leak. If oil can leak out water will get in even more easily.

I would have fitted new seals of the same type as the old ones to the old screws.

A few use O rings but the screws are a slightly different design
 

adg

Petty Officer 3rd Class
Joined
May 26, 2012
Messages
76
Re: lower unit drain plug gasket not completely sealing

thx Vic - I have replaced the paper gasket with a seal like I had on earlier - i just wonder if the paper
gasket was ok but it was just the oil that had to leak out of the screw head hole after changing oil.

Anyway, will see how it goes now.
 

GA_Boater

Honorary Moderator Emeritus
Joined
May 24, 2011
Messages
49,038
Re: lower unit drain plug gasket not completely sealing

Sometimes the old paper gasket or parts of it stick to the sealing area. I think the nylon/plastic gaskets work a little better. Hope it's leak free now.
 

adg

Petty Officer 3rd Class
Joined
May 26, 2012
Messages
76
Re: lower unit drain plug gasket not completely sealing

Nylon / plastic gasket did the trick - no leaks anymore now.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: lower unit drain plug gasket not completely sealing

Torque those drain plugs down to 84 inch pds.
 
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