coupler questions..possible problem

[diesel1984]

thats a flex coupler something special(not really) that you have to do for aqua jets. how do i fix the stuffing tube?

[JimClark]

They must do that to cover up sloppy workmanship.
Is the stuffing tube epoxied in?

[diesel1984]

possibly lol it should be epoxied in i do have another stuffing tube just never messed with it..how do i put it in right?

[Mich. Maniac]

I see that as well, between the 2 couplings the flex shaft looks like it has slack. may be causing whip at low rpm and then vibrating as a whole at high rpm

[Doozie870]

Everything is wrong, first bend the motor mount way down until you get ONE smooth arc in the flex, then take out the motor mount screws and run the motor connected on say 1/8 throttle, while running, move the motor around slightly from side to side and forward to back, until you find the sweet spot,(motor rpm will increase and sound free running). drop some ca to hold it there and redrill the motor mount holes. Also check your tube bushings for play, most vibration including an out of balance prop, are absorbed by the coupler, IMO.

[diesel1984]

sorry if im coming off say RETARDED but what exactly is a tube bushing? so im starting from scratch getting new mount and putting in new stuff brass tube and the whole nine yards i guess. any suggestions on how to mount the stuffing tube back...im not supposed to bend it or am i? only asking since on the tips section they do..but my stock one was not bent so just stick it in at angle? here is a pic of the stuff tube, let me know if i should change it i havent set it in yet just sitting in place. thanks, michael...also should my stuffing tube be loose for when i bench test it?

[diesel1984]

i bought this boat used and seems to give me nothing but hassle..but i prolly mess with it too much...but im not giving up yet? does my hull look ok or do i need a new one of those 2?

[Doozie870]

Definatly dont run it with the stern tube not fixed!! so are you planning to slide the solid shaft into the brass tube? if so it will heat up and bind quickly,I think OE has a kit that has the tube, bushings,and shaft in one package, I would recommend one of those. clean out where the tube is going to fit real good, maybe with a little acetone, and epoxy the new tube in. the boat looks fine, once you get the kinks out it should be reliable and fun.