'71 18HP Gear Oil Type?

[Oregon Jon]

I have Valvoline Extreme Pressure Outboard Gear Oil that comes in a 9.9 oz tube. The old Clymer tune up manual I have lists OMC Sea Lube in a 13.7 oz tube. Is the Valvoline equivilent, or do I need to search harder?

 

[tashasdaddy]

Re: '71 18HP Gear Oil Type?

it's fine, may take 2 tubes.

 

[Oregon Jon]

Re: '71 18HP Gear Oil Type?

Thanks. Also on the same motor (I have twins) there's a little leaking around the seals where the pieces of the lower unit bolt together. The motors had set for several years before I purchased them. Do I need to replace the seals or would a little tightening be a good starting point? I gave about a half turn to all the bolts where the leaks are. They all seemed more loose than I thought they should be, but I haven't checked to see if this helped yet.