Reply To: 1956 Johnson 10 hp QD-17 Gear and Shaft

[Mumbles]

Mike Nazarenko wrote:

Sorry for a silly question but how can I tell the difference between the stamped brass and the cast bronze. And why can’t you mix the two

Thank you.

That’s not a silly question and in fact I think it’s quite a good one.

The stamped gears are just that, they were stamped out of a piece of flat material and have sharp points on the tips of the teeth.  The cast ones are a lot thicker and have ball shaped tips on the teeth. You’ll know a stamped one when you see it.

The only problem with the cast gears is the teeth can break off if the throttle is turned with the tiller in the up position.  This is real common on the 9.9/15 horse motors where the tiller  can be raised way past the vertical position and the teeth are barely engaging.

I’ve never tried mismatching  them and I doubt if it would work as they are two totally different animals. Who knows but the tooth count might be different to.

Now if I could just find some photos…..