sear gearcase lubrication

[kpk]

Hi,
I recently bought an old Sears outboard that required some repair and cleaning; s/n: 641.4623, mod no.: 571.58641. When I dissassembled the lower gearcase, it had caked grease or oil in it. The bevel gears look to be in good shape though. My question is this. Upon reassembly, what type and quantity of oil should I put in there. I noticed there are no fill/drain plugs so I assume you fill it before installing the propeller shaft casting, right?

 

[steelespike]

Re: sear gearcase lubrication

Your motor is a 51 6 hp. built by West Bend.
I believe you pack the gearcase with non channeling waterproof grease.
Someone at The Antique Outboard Motor Club
www.aomci.org should be able to be more specific.
By the way according to 1954 lube chart the 51 6 hp is 3/4 pt to a gallon fuel mix.
Use tcw3 rated oil.You might ask at the Outboard Motor club what they think about doing less.

 

[kpk]

Re: sear gearcase lubrication

I never heard of non channeling waterproof grease before. What does "non channeling" mean. I posted a message at aomci.org but didn't get a resonse. I am wondering how much grease to put in.

 

[steelespike]

Re: sear gearcase lubrication

I'll be honest I read it somewhere and I had some and used it.I think they also use it in the old inboard gear type water pumps.You might go to Chinewalkersplace
and ask him.He has many old motors and I'm sure he would have a proper explanation and probably a modern sibstitute lube.

 

[tmcalavy]

Re: sear gearcase lubrication

You have a reply on the aomci board explaining what non-channeling grease is all about. I've always used Lubriplate 105 engine assembly white grease from the auto parts stores for direct drive, no-shift early outboards. It's thicker than the later LU 80-90 wt. lubes and won't leak out if the seals are less than perfect. Also doesn't froth and foam when mixed with a little bit of water. I've also heard of people using in full shift outboards up through the 60's because of bad seals. If it were mine, I'd fill the pumpkin with lubriplate, put it back together and check it about 2-3 times per season for maintenance.