Prop Shaft Alignment Yearly Maintenance Item

[DOCDRS]

While prying on the motor mount tap the trunnion with a hammer. Vibration should set it free

[squeeg333]

The rear is the tough one. I think Doug has it right, try tapping on the trunnion while prying. Fortunately, I didn't have to do this, but vibrations should shake it loose. Good luck man! One thing to check is that all four of the trunnion pins are loose, loose enough to wiggle them by hand. If any of them are still tight, you won't get it to move no matter what you do!!

[rdlangston13]

i never got it better than .017. called a local shop and the owner said dont worry about it.

[cab13367]

i never got it better than .017. called a local shop and the owner said dont worry about it.

Was it consistent all the way around? Did you recheck the gap after you torqued down the coupler bolts?

[rdlangston13]

Was it consistent all the way around? Did you recheck the gap after you torqued down the coupler bolts?

no matter where the shaft was turned the gap was on the port side lower section. after torquing the coupler down there will be no gap since it will be pressed together right?

[cab13367]

no matter where the shaft was turned the gap was on the port side lower section.

That's good because that means your shaft is not bent.

after torquing the coupler down there will be no gap since it will be pressed together right?

No. There should always be a slight, consistent gap (.002") all the way around if it's aligned properly.

[rdlangston13]

That's good because that means your shaft is not bent.



No. There should always be a slight, consistent gap (.002") all the way around if it's aligned properly.

the reason it never got smalled than .017 is because the motor just would not move. and i thought if you tightened the couplers up it pull the two together. have a gab after tightening the bolts makes no sense to me

[DOCDRS]

the reason it never got smalled than .017 is because the motor just would not move. and i thought if you tightened the couplers up it pull the two together. have a gab after tightening the bolts makes no sense to me

NO, tightning anything should not adjust the alignment. Tightening just holds everything where it is supposed to be. If when you rotate your shaft the gap remains constant in the same place then as Al stated your shaft is not bent. But .017 is a huge misalignment. The goal is to not have more than a .002 gap anywhere around the coupler not .002 around the entire coupler, although if this were the case then if you pulled them a little closer that .002 would drop to 0 which is what is perfect. You have to prybar and tap the trunnion to free the engine mount on its mount. Once you get it free it usu moves easier.

[squeeg333]

I guess I'm confused on that as well. If we torque the 4 coupling bolts to spec, that should pull the two coupling faces together to have no gap. At least, that's what I would think?

[brain_rinse]

I agree... I'd expect a gap of 0 when the bolts are tightened down, regardless of shaft alignment.