I have 2 different J model Ruddertwins.
Each has a different method for driving the prop. The one I’m currently restoring has a coiled spring, with dual tabs. One tab locks in the prop, the opposite tab into gearcase, to drive the prop, and act as a shock absorber I imagine. My spring was broken, so looking for a replacement in the classifieds.
I have another motor. Thought I would steal the spring and replace it later on. However, the second motor has a completely different setup. It has a clutch dog type engagement with lugs. The prop is held on with a nut, which puts pressure on a spring, which then puts pressure on the prop. I suppose another way of making a shock absorber. If the prop hits a submerged object, the spring could compress, allowing the dogs to disengage, and the prop to free spin until past the obstruction, when it would re engage.
Both interesting ideas. Was one a superseded idea over another>? If so, which one is the later version? I’m assuming the clutch dog style is the more current design, but thought I would ask to verify. If it is, I may try to install that variation on my current restoration if its an improvement.
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