Stock Proboat flex shaft vs OSE upgraded flex shaft

[Hawcer]

The stock shaft in my UL-19 isn’t very true and has lots of wobble. This causes buzzes, vibrations, and premature strut bushing wear, IMO.

I ordered an OSE uprgrade shaft to replace it.
It comes with:

- flex shaft
- drive dog
- nut
- brass bullet nut
- Teflon stuffing liner.

It’s preset and ready to install once the old line is removed. This is the hardest part of the job imo. I removed the strut so it could also be thoroughly cleaned. It’s also a good idea to run a cleaning patch up the brass stuffing tube to clean out any gunk.

The new liner may need to be trimmed off a little. I left it a bit longer than the factory liner. It extends out past the brass tubing about 3/16” on both ends.

OSE also has a HD flex dive that is much thicker and doesn’t require a liner, but they were out of stock.

I recommend anyone with a Proboat to check their shafts, Horizon didn’t seem to think this was an issue and this is the norm for their shafts.

Just look at this quick vid I made to see the difference. It’s not super technical, but you can see the difference.