Reasonable Run-Out?

[Mario Johnston]

On the average inboard, (mono, outrigger, sport hydro, etc) What sort of distance from the collet to the stuffing tube is considered to be safe and reasonable in your opinion?
Obviously, enough is needed to loosen the thread on the collet and remove the flex shaft where necessary. Interested in what formula others are using

 

[Mike Betke]

I've always use 5/8 to 3/4 inch as a rule of thumb and not had any failures. No formula behind it, just always seemed to work.

 

[Grimracer]

I use just enough to get the belt though.. opinions may vary.

Grim

 

[FloridaScaleBoater]

I use just enough to get the belt though.. opinions may vary.

Grim

+1

 

[Jeff Lutz]

On the average inboard, (mono, outrigger, sport hydro, etc) What sort of distance from the collet to the stuffing tube is considered to be safe and reasonable in your opinion?
Obviously, enough is needed to loosen the thread on the collet and remove the flex shaft where necessary. Interested in what formula others are usingView attachment 277838

Just enough to get the belt out. This is more than others have mentioned, but I saw a boater with about 1” or 1 1/4” and the flex shaft whipped and got wildly loose and tore the stuffing box to threads. I have seen the end of people’s tubes be flared looking when they had a bigger gap than I’ve used also.