is this normal?

[chrisdoc0608]

I just replaced my pump and midshaft, while trying to shim the back of the pump i put bt an 8th'' or a little more of shims and the drive shaft is still not in the center of the hole. Is that much shimming normal? it just seems a bit excessive

 

[D-Roc]

does your hull have number written on it from the factory at the back two pump bolts?

 

[chrisdoc0608]

no numbers anywhere near the bolts that i can see, I tightened the front bolts and the rear bolts were sitting 1/8'' off of the hull with nothing shimming it, with the shims i have in it now (motor shims) it brought the shaft up a bit so it is not on touching anything but it is not centered

 

[keefer]

Maybe the shaft is a little out of true. You would have to put it on V blocks with a dial indicator to check the runout. I have bent mine while removing a stubborn prop. It can be straightened without too much trouble. I would just shim the back with a big enough shim to take up the gap and make sure the shaft was straight and then shim the engine to align the couplers if necessary.

 

[SurferSmurf]

i just had the same issue. i had to put 1/8 to 3/16 in there. the shaft is dead strait. but i would imagine the poor alignment from the previous owner is what destroyed the drive shaft and coupler shaft.

 

[chrisdoc0608]

the shaft appears to be straight, there is no loping motion when it spins so i am pretty sure it is fine. my previous midshaft was not straight and i think thats what made my splines go. i guess ill just leave it alone, the shaft isnt touching the hole in the hull at least