73 Merc 500 lower unit gear fluid

knouse94

Petty Officer 3rd Class
Joined
Aug 28, 2010
Messages
88
What kind do I use and where do I get it online (I live in the middle of no where Nebraska) Thanks
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,549
Re: 73 Merc 500 lower unit gear fluid

Any "marine gear oil for mechanical shift motors" is what you want to use. I recommend you get the gear oil pump as well. In your case, you might order two qts, so you have enough to change gear oil twice. It is avail at Walmart, Kmart and other department stores. You got any of those?

automotive gear oil is a last chance substitute. You do have that stuff, right?
 

knouse94

Petty Officer 3rd Class
Joined
Aug 28, 2010
Messages
88
Re: 73 Merc 500 lower unit gear fluid

Yes I will check it out, we have a small one that does not carry much boating stuff. Thank you for replying to my questions Chris.
 
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