just swapping my engine sprocket for the prop adapter, and it won't quite tighten up - i.e. the adapter is still slightly loose even though the centre bolt is tight.

It seems that the shaft is slightly longer than the depth of the adapter.

I can either shim it, which is my preferred solution or perhaps i should just take a few thou off the end of the shaft with Mr angry grinder or should I just fit it as it is? does it really matter - the original sprocket seemed to be not tight just the same.

What has everyone else done?

Cheers

Mark

i'd vote shim

Yep, shim, don't like things sloppy

R

Forgot to ask - if shim is the way to go, where would I get a suitable shim?

quote:

---

Originally posted by RichardK
Yep, shim, don't like things sloppy

R

---

How thick does it need to be? And what sort of size?

David

Mine was the same, I put a shim in and it's fine. Barry

washers?

quote:

---

Originally posted by flak monkey
How thick does it need to be? And what sort of size?

David

---

Hi Mark,

I'll have a look and see what materials I have in stock tomorrow. Defo have some ali, but would be better in steel.

David

I'd be happier with steel too.

Just a quick point
there should be a slight end float when the bolt and washer is tight. That is to say that the bolt should tighten down onto the gearbox output shaft and not the adaptor.
If you look at any bikes sprocket you will find this small tolerance.
The reason for this is that if the washer hits the adaptor and then the bolt continues to tighten there is a tendency for the washer to dish slightly. The thrust and backlash in the dog box then works the washer and slowly undoes the bolt.
We found this with the rgb cars which were forever undoing the main adaptor bolt until we allowed some tolerance.
Hope that helps
regards
Andy

quote:

---

Originally posted by Andy B
Just a quick point
there should be a slight end float when the bolt and washer is tight. That is to say that the bolt should tighten down onto the gearbox output shaft and not the adaptor.
If you look at any bikes sprocket you will find this small tolerance.
The reason for this is that if the washer hits the adaptor and then the bolt continues to tighten there is a tendency for the washer to dish slightly. The thrust and backlash in the dog box then works the washer and slowly undoes the bolt.
We found this with the rgb cars which were forever undoing the main adaptor bolt until we allowed some tolerance.
Hope that helps
regards
Andy

---

makes me feel better about my sloppy adaptor now!

Slight end float and sloppy are two different things aren't they? If its sloppy I would still pack out to attain slight end float.

If it doesn't seem right....

Cheers

R