JMP full bronze replacement raw water pump

[KWKloeber]

You will need to determine gear ratio's for an M35 to get pump GPM's

Note:

The ratio is the same for all engines.  The fuel camshaft that drives the pump is always equals 1/2 the engine RPM (the IP spits fuel to each cylinder every-other revolution.

[Jon W]

Hi Ken, thanks for the clarification. I didn't know the gear ratios are the same.

[KeelsonGraham]

Apologies for the late responses, but I've been away.

The impeller is definitely not the same, but the replacements are a lot cheaper.

I've not taken the thing apart so, I'm not sure what the internal differences are. Externally, it's machined well and sits very nicely on the land. I used my original elbow joints on the JMP, again with no problems.

Subjectively, water outflow seems about the same. It does the job just fine in UK sea temperatures (65 Fahrenheit).