Thanks for the replys , i new it wasnt the seals as i have a spare upper with no seals on the shaft and that woulnt go in , plus i could tell it was something solid stoping it going in the last inch .

i kinda have the same problem Installed complete new transom assy went to install engines with gil offshore mounts and one engine lines up perfect and the other is not. not sure what could have changed.

Those o-rings are a b*tch sometimes!!!

Have you ever tried to give a cat a bath? Well, Bravo's do the same thing when you try to put them behind some HP.

I just did some Bravo work too. Everything goes back ok until the last inch. LOL put the thing in gear, slap on a prop and turn the driveshaft, Universal) a bit, move the drive back in as you turn or nodge the driveshaft. The drive shaft teeth needs to align with the engine (female) groves. The reason it won't go back since the teeth are not the same alignment as you took them off. no biggie, just be gentle.

Yes that can sometimes be the case if you have not changed the Gimble /B , but if the Eyeball is off from what was in there when you removed drive that thing will never go back on no matter how hard you ram it in . The eyeball has to be lined up with the splines on the motor .