evinrude lower unit

[jimmyz1]

I changed the gear lube in the lower unit and it was very nasty. Don't know the last time it was changed before I purchased it. The top vent/fill line plug has a black rubber gasket on the plug and there is a plastic gasket that is around the threads of the fill line hole.

On the bottom drain plug, the plug has the black rubber gasket, but I did not notice a plastic gasket like the top plug has. Is the bottom plug also suppose to have a plasic gasket in addition to the plug gasket? Thanks for any info.

 

[jimmyz1]

Re: evinrude lower unit

1972 evinrude 25HP is the year and size.

 

[samo_ott]

Re: evinrude lower unit

There should be 1 little gasket per screw. Buy the new ones @ OMC/BRP for a less than a buck each. They should be changed regularly. Also if you have not refilled the LU yet, put some solvent in first, turn it by hand a bunch of times to clean it up, then drain it out and refill with good LU oil. That'll clean the gunk out some.

 

[F_R]

Re: evinrude lower unit

Some plugs had a gasket made of gasket material.
Some plugs had a gasket made of a white plastic material.
Some plugs had a rubber o-ring in a groove.

Any of them will work. But none of them need more than one seal.

 

[JB]

Re: evinrude lower unit

The top plug is Vent only. Drain and fill from the bottom plug.

Replace OEM plug gaskets EVERY time you have the plug out.