1978 Johnson 115 gear lube???

[Boilermaker]

I'm sure its been asked, but what is the best lube to use for my gear case oil??? Are the newwer synthetic oils OK/good/best/not needed/bad for the older gearcases??? <br />Would I have to flush the old oil out with something if switching??? <br /> If staying with petrolium based lube>> what oil should I use >>90w hypoid, 80w/90? \<br /> AND what is the proper amount to add??? I know that you fill from the bottom until it comes out the top plug hole, but how much does it take??? I don't remember how many tubes to buy. <br />Gettin' forgetfull lately.

 

[emdsapmgr]

Re: 1978 Johnson 115 gear lube???

Bombardier has come out with a new outboard lower unit oil this year. Called XPR. It replaces their "ultra" which was their premium lower unit oil for many years. Has some synthetic in it. Get a quart.

 

[tashasdaddy]

Re: 1978 Johnson 115 gear lube???

if you have electric shift, stay with the mfg recommended oil.

 

[Boilermaker]

Re: 1978 Johnson 115 gear lube???

No Electric shift in 1978 as far as I know. <br /><br />>>>So it takes a Qt.???<br />I don't know why I was thinking it was one of <br />those squeeze tubes>>> I think they are a pint. I guess the last time I changed it myself, it took 2 of those tubes. <br /> THANKS GUYS