In Reply to: Some Info On Cast Iron Governors and Distributors posted by Tim Daley(MI) on August 27, 2012 at 06:59:29:
Tim....my 9n  has the cast aluminum base distributor and the cast iron governor.My governor says MODEL 9NA on the body.It also has what appears to be a small dia. screw in the area just above the boss where the later oil line fitting would go.This small screw in plug or screw is about 1/4" in dia. with a slotted head.
As for what John Smith says....he may be right but the info I posted came from the original prints.They state....9n12131 distributor base...4-21-1939... part made from #2 aluminum alloy.The 9n12131B was the same as the "A" except one of the 1/8 "holes were omitted in the bottom of the base that was for ventilation, to prevent condensation on 11-17-1939.BUT....lots of things don't necessarily jive with prints,especially on the first few tractors.Your call!!! don b
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