lower unit lube

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tx1961whaler

Vice Admiral
Joined
May 31, 2008
Messages
5,197
Re: lower unit lube

85-90W marine gear oil. Less than 1 quart required. Squeeze in through the bottom drain hole until it squirts out the top drain hole. Don't take out the phillips screw.
 
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Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: lower unit lube

And use new seal washers on the drain/vent screws.
 
nwcove

nwcove

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Joined
May 16, 2011
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6,293
Re: lower unit lube

just a point of interest..... i always fill my small motors with them vertical on a stand, but recently watched a friend fill his gearcase (from the bottom hole) with the motor laying on its side. told him ididnt think it was a good idea to do it that way, because you can loose the expansion space, and blow seals out. is my old brain having a moment???? lol :eek:
 
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dazk14

Ensign
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Jul 22, 2008
Messages
966
Re: lower unit lube

There are a few motors that were filled that way, but 99.9% odds he doesn't have one... and yes, the expansion space is needed.
 
nwcove

nwcove

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May 16, 2011
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6,293
Re: lower unit lube

guess i should have mentioned .....it appeared to be a late 80's evinrude 9.9.
 
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dazk14

Ensign
Joined
Jul 22, 2008
Messages
966
Re: lower unit lube

Your friend fits squarely into the 99.9% and you are 100% correct...

He may have some air pockets in there, but unless he's refilling with a specific ounce quantity(can be done), who in ell' knows what's in there.

The 9.9's of that vintage take 9 ounces from a dry start.
 
nwcove

nwcove

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Joined
May 16, 2011
Messages
6,293
Re: lower unit lube

:facepalm:
dazk14 said:
The FULLY drained refill capacity of the 1973 6hp is 9 ounces. All other info has been posted.
Click to expand...

thats great daz, nice to see you closed the thread ! hopefully others have all the info / opinions they need to properly service their gearcase! :facepalm:
 
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