When Ignorance ISN'T Bliss

[KWKloeber]

What were your caliper readings?

[KeelsonGraham]

Haven't done them yet KW. Been away a lot recently. Hopefully, I'll get back down to the boat within the next two weeks.

[KWKloeber]

If you have emulsified oil behind the pump land that's an indication to me that water was getting past the rear seal of the seawater pump (like if the weep hole was corroded shut.)

[Ron Hill]

Keel : You best better track down where that water is coming from and mixing with the oil.  NOT Good!!

A thought

[KeelsonGraham]

I'm 99% certain that the emulsified oil is the result of a failed seal in the water pump. That old pump is completely and utterly shot. I'll check the inside of the rocker cover, of course. Hopefully there's been no major ingress into the engine block.

[KeelsonGraham]

Pretty interesting measuring the difference between the old Sherwood pump and the new JMP one. The old pump was 5mm short of fully engaging in the camshaft slot. The new JMP is only 1mm short (which is probably about right). This is all accounted for by the fact that the key on the new JMP pump is longer than the key on the old Sherwood.

Maybe the Sherwood was the wrong one?

[KWKloeber]

@Keel

How long is the tang on the Sherwood and what's the distance from its end to the mounting face of the pump?