shaft alignment question
Posted: Tue May 04, 2010 4:49 pm
I'm pretty sure I'm going in this coming weekend and one thing has been bugging me.
When I hauled the boat, the port side shaft was almost touching the bottom/right corner of the shaft log. It wasn't actually touching, no evidence that it was and no vibration or noise last year. The cutlass bearings are both tight with no play.
Over the winter, I replaced the stuffing box and hose on each side. With the coupler disconnected, I can get the shaft centered by loosening the clamps on the stuffing box hose and shifting it to the left about about a 1/4". The end of the hose doesn't sit exactly flush with face of the shaft log on one side now (on the inside) by the 1/4" or so.
I called Buck Algonquin and they said this was a good idea and would save time in "wearing" in the new stuffing box. That part is good and once it goes in I can do my final alignment.
The downside is now there's a slight gap on one side of the cutlass bearing because I've shifted the shaft over. At some point, I assume it'll wear into the other side and eventually cause a vibration. It really wants to be more to the right because I'm sure it's been that way for years.
My question is, how long would that take?
I know I can get the engine aligned doing it this way but probably need to replace the cutlass bearing so it's more in-line. Again, no play now but a slight gap that wasn't there before. I could probably put it back the way it was but I just don't like the idea of the shaft being so close to the log, not much margin for error if it shifted out of alignment.
Do you guys think I can get a season out of the cutlass bearing and deal with it next year? I just don't know how fast they wear. I'm trying to make this decision now while I can still see under the boat.
thanks,
Bob
When I hauled the boat, the port side shaft was almost touching the bottom/right corner of the shaft log. It wasn't actually touching, no evidence that it was and no vibration or noise last year. The cutlass bearings are both tight with no play.
Over the winter, I replaced the stuffing box and hose on each side. With the coupler disconnected, I can get the shaft centered by loosening the clamps on the stuffing box hose and shifting it to the left about about a 1/4". The end of the hose doesn't sit exactly flush with face of the shaft log on one side now (on the inside) by the 1/4" or so.
I called Buck Algonquin and they said this was a good idea and would save time in "wearing" in the new stuffing box. That part is good and once it goes in I can do my final alignment.
The downside is now there's a slight gap on one side of the cutlass bearing because I've shifted the shaft over. At some point, I assume it'll wear into the other side and eventually cause a vibration. It really wants to be more to the right because I'm sure it's been that way for years.
My question is, how long would that take?
I know I can get the engine aligned doing it this way but probably need to replace the cutlass bearing so it's more in-line. Again, no play now but a slight gap that wasn't there before. I could probably put it back the way it was but I just don't like the idea of the shaft being so close to the log, not much margin for error if it shifted out of alignment.
Do you guys think I can get a season out of the cutlass bearing and deal with it next year? I just don't know how fast they wear. I'm trying to make this decision now while I can still see under the boat.
thanks,
Bob