Identifying Original Props '79 37C

[Bob Bradley]

I'm helping my kids find their missing rpm. 671TI engines only making 2000 under load. 2500 no load. I replaced one bad injector. They're all firing now. Intercooler cleaning next but I think the props may be wrong. It was difficult to read the stamps on them, but they looked different on each one. The spare set looks like they were repitched from 23 x 21 to 23 x 19. I'd like to know what was there originally

 

[Captain Ralph]

How is the fuel pressure after secondary filter?
Air box pressure?
Both engines not making RPM?

Probably a N90 injector.
You should be running fine with a 22" pitch, Screaming @ 19".

Sam's may know the factory wheel spec.

 

[Bob Bradley]

Both not making rpm. No pressure gauges. Engines have two secondary filters after the Racor. 20 and 10 micron.

Would Sams just need the hull I'd to tell which props?

 

[Bob Bradley]

Yes, N90 injectors.