1989 5hp Force Long Shaft Removal?

[Klink]

I'm changing the impeller on a 1989 5hp long shaft, I've done short shaft impellers a few times, but this long shaft has an extra 5" extension housing that is attached at the front and I can't remove it from the lower unit. The manual says nothing about this 5" extension. According to the part diagram the rod that holds it in place is not threaded and should slide right off, but it isn't budging. The rod that holds it is the same one that holds the short shaft in the front. Except it is 5" longer. Anyone ever work on one of these long shafts?

 

[Frank Acampora]

It is a crappy design and the long front stud frequently will be corroded tight in its hole. Apply heat and penetrant and try to twist the 5 inch extension. You may actually end up twisting our the stud from the gearcase.. When you do get it free and go to reasssmble it, ream the corrosion out of the hole and coat the stud with anti-seize to help prevent a recurrence.

 

[Frank Acampora]

It is a crappy design and the long front stud frequently will be corroded tight in its hole. Apply heat to the front of the aluminum extension and penetrant and try to twist the 5 inch extension. You may actually end up twisting our the stud from the gearcase.. When you do get it free and go to reasssmble it, ream the corrosion out of the hole and coat the stud with anti-seize to help prevent a recurrence.

You can try threading on a nut so you don't ****-up the threads and hammering on it but this will most likely be futile

 

[Klink]

It is a crappy design and the long front stud frequently will be corroded tight in its hole. Apply heat to the front of the aluminum extension and penetrant and try to twist the 5 inch extension. You may actually end up twisting our the stud from the gearcase.. When you do get it free and go to reasssmble it, ream the corrosion out of the hole and coat the stud with anti-seize to help prevent a recurrence.

You can try threading on a nut so you don't ****-up the threads and hammering on it but this will most likely be futile

Did it all, thanks! I locked two nuts on top back to back and tried to take it off with an open wrench, with much oil. Then I tried it the same locked nuts again but with also a vise grip, and that did the trick. I cleaned the bottom threads on the rod and the lower unit hole with a tap and die. Everything is now spotless to install again, this time with the threads coated in Permatex 3H. Thanks!