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Old Sep 28, 2012, 02:18 PM
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USA, TX, San Antonio
Joined Jun 2010
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Originally Posted by Ah Clem View Post

Great information sir!

I do remember that they were much easier to start with an electric starter, than by hand. There was not much of anything in the way of compression, on the ones I owned, and they lacked a properly tapered collect or keyway at the front of the crankshaft where the propeller backing plate was. No amount of tightening could keep the propeller from coming loose (again, I have a sample of two to work with).
The Series 21 were ringed with the same type ring that K&B was using -- called a Dykes Ring. There was some trick, like carrying STP in an injector, or something else of similar weight to amp up the compression for hand starting. I never owned one, however, I'd bet that the same trick that worked for Red Heads would have helped the Black Head motors to grip a prop.

The thrust washer only had dimples on it that couldn't get a grip on maple, nylon, or other harder composition props, but the thrust washers from K&B's GH 35 and 45, plus late model GH 29s, with the sharp edged teeth, fit the RHs perfectly. I'd like to have such a thrust washer now as a spare to use on the McCoy 40 RH that I still have.

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Last edited by The Kiwi; Sep 28, 2012 at 05:56 PM. Reason: Failed differentiate different K&B models.
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