Pop Quiz! Blackjack flex shaft???

[xletts]

Can anyone tell me what size the BJ26 flex shaft is? I need to order a coupler and (as you can tell) don't have any imperial calipers - man when are you guys gonna join the ROTW and go metric?

[Duclover]

Correct me if I am wrong (Any vets that may read this thread) but I believe your answer is: 125 flex shaft with 3/16ths stub shaft flex shaft per the Fuller's site

http://www.drcwebservices.com/ffe/hardware.htm under the offshore hardware advert. Also horizon sells it for under $15...

http://www.horizonhobby.com/Products...ProdID=PRB2812. Hope that helps at least.

[xletts]

Fantastic thanks!

[bwells]

what is a stub shaft flex shaft? I'm trying the same thing but to go to a 3mm motor. Mine is a bj26 ep and only has one flex with u joint to a 1/8 inch prop shaft. I used my plastic calipers and it looks like .145 but that isn't an option. Thanks for any help as this is holding up my first build. Brian

[dodge4x4]

the origional blackjack flex shaft is .150 same as the super vee 27 but back at the stearable outdrive/ u-joint it goes to a 1/8 subshaft or prop shaft. Which ever you want to call it.
Many people are converting them to a 150 flex shaft with a 3/16 prop shaft because theres a large number of prop selections available for the 3/16 shaft where as the 1/8" shaft is pretty limited on prop size unless you want to run a bushing. Personally I
don't like to use bushings. But to change to a 3/16 prop shaft you will need to replace the strut and add a rudder.