Water Pump Grease Cup

[GregH]

Morning Folks!

So here I am thinking that I'm just about set for my first season with the A-4 in the water... water... water.. water pump... lube... grease cup... !?

Never used one before - how often do you tighten it in? how much do you tighten each time? - it has been filled and screwed back on enough not to fall off.. but other than that help would be appreciated oh wise sages!

This could be a make or break!

[tac]

I haven’t used the grease cup in years. I added the Moyer grease gun kit, which I see is out of stock:

https://moyermarine.com/product/remo...it-ktas_03_88/

It doesn’t take much grease - my ***ORIGINAL*** A4 manual says 1 to 1-1/2 turns.

[tac]

As to frequency, an older manual says,

“Lubrication of the water pump seals is provided from the grease cup located on the pump body. Periodically tighten the cup until some resistance is felt to force the grease into the drive shaft housing. When the grease cup cannot be turned further in, refill with a good grade of water pump grease.”

[roadnsky]

I don't have a grease cup anymore thanks to my really cool MMI 502 pump.
But I have an old note in my maintenance book that says 1 to 1½ turns every 10-15 hours of engine operation.
YMMV...

[ndutton]

I found a tractor lubrication spec from 1919 that called for 1 grease cup turn every 2 hours of operation on rotating shafts (as opposed to eccentrics). That seemed like a lot to me but I confess my three old Oberdorfer pumps all have (1 had) scored shafts. There's a new MMI 502 on my boat engine because I grew weary of rebuilding.

[JOHN COOKSON]

Water pump grease is hard to find now days. I use boat trailer wheel bearing waterproof grease. It works great.

TRUE GRIT

[Sam]

We have a short season in Chicago and I am on my second water pump in 40+ years [with some shaft scoring]. I use common white waterproof lithium grease, fill cup at beginning of season and turn till grease oozes out, clean and refill and turn in about 1/4 - 1/2 turn every outing.