UPDATE:
I have new J2 water pump impellers as well as diaphragm material. Cost of the impeller is $25 and diaphragm material $15. Priority mail cost is $5.95 for a total of $45.95. Send your name & address along with your request and I will invoice you for the parts via PayPal. They will be shipped the first business day following receipt of payment.

Thanks for your inquiry.
Dick Gorz
Ollie Marine Distributing
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FYI, the impeller is 6 vane, approximately 1-7/8 wide, 1/2" shaft size, and 7/16" thick
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Does anyone know if there’s a OMC / Sierra impeller that will
fit the "subject" outboard?
In the mean time I’m awaiting reply from Oliver Outboard Fixation
regarding availability.

I haven’t taken measurements yet, but it’s a mid size 6 vane
impeller, driven by a pin in the driveshaft.
Pump cover does not slide off the top of the driveshaft as the
top end is larger. Will have to look at the parts diagram to
see what I’m in for.

New "outboard Jim" coils installed, so I’m getting pumped to
hear in run the first time!

Thanks.