Shaft dimple necessity

Figment · Post by **Figment** » Mon May 05, 2003 1:03 pm

(refer to "Sometimes it's just so easy" thread)

I was wondering aloud how much thrust an Atomic 4 could realistically generate to necessitate a dimple in the propshaft for the setscrew at the engine coupling....

I'd say it's necessary.

When I first installed the shaft, I cranked down on the setscrew (bolt) pretty well. I didn't really go to town on it, because for the past few years I've been consciously trying to break my bad overtightening habit. Still, I'd say I gave it plenty of oomph.

I had loosely (I thought) fit the prop onto the shaft at the time just to check clearances, etc. Yesterday I went to remove the prop and it wouldn't budge. I knew I hadn't put it on that well, so I did the big no-no and gave the hub a few easy whacks with a hammer, expecting it to pop free.

The prop didn't budge, but the SHAFT was moving aft out of the coupling!!!

My shaft has a dimple now.

Post by **dasein668** » Mon May 05, 2003 5:07 pm

Tsk tsk. Hit the prop with a hammer. Tsk tsk.

Nobody on this list would ever do anything like that.... ;-P

Yup. Sure is amazing how tenaciously those props hold on to the shaft! Getting mine off was a nightmare and a half...