Does anyone know the part number for these? Or even better, does anyone have an old one you want to sell? All I really need is the pump-arm assembly.

A friend of mine has 2 from mercruiser brand new never used way below list. You can either email/pm me. I posted the ad in "parts for sale" and I'll TTT for you. His ph# is there unless you want me to call him for you. Hope this helps you out.

Sorry, I need the fuel pumps, not the sea water pumps...

Steve,
Pt # 861677T. This was for my GenV HP465/502.
I bought a new Merc pump a couple yrs ago because I thought the diaphram was leaking do to a gas smell in the water pump oil reservior. It appears it is just a normal thing as I see alot of people say same thing. Gas was never in the sight tube, so I suspect it was never bad. I used the new pump arm half only and retained the other half as it was drilled for larger fittings.
I still have the used pump arm mounted on the brand new/never used bottom half.
$50 to your door.

O.K. heres my window to ask about the res. what oil...how much...and how do you check. My bad I know, but in 400 hours I have done nothing . the fill plug is in the side of the body..do you squirt some gear oil in there till it runs back, like a bath/diff. ? Help?

Merc Hi Perf Lube oil, (outdrive oil) 1/2-3/4 cup????? Not much.

Mine had 2 plugs (upper and lower) on the side facing out. Fill till it runs out the upper plug.
I always removed the fuel pump and drained the oil out completely a couple times a yr and refilled thru the fuel pump opening until even with the bottom of the top plug. The lower plug won't drain all the oil.

Thanks, I need to get on this before they ****z......

US1 Fountain, check your email...

The newer style pumps don't have the lower hole, just the upper. Have to be removed to dump out the oil. I tried to suck it out, doesn't get enough.