mark1905
Chief Petty Officer
- Joined
- May 25, 2008
- Messages
- 535
Hello all..
This is a cleaned up version of this thread:
http://forums.iboats.com/showthread.php?t=292530
1997 3.0LX Alpha 1 Gen 2
When running above 4300rpm, boat is making a screeching/rubbing/growl noise from the back transom area. At 4000 - 4300, it only does it while turning from side to side. Exactly when you touch the steering wheel, it makes the sound.
We've run with the hatch up, had my mechanic stick his head all in there, and he cannot figure out where exactly it is coming from or what the heck it is. It is coming from the rear of the motor, but not in the motor. Drivelive/transom area.
Purchased the boat last year, and did a dumdum and didn't check the bellows. They were cracked and leaking bad, and as such the gimbal bearing was rusted and shot. Replaced the gimbal bearing, and obviously checked engine alignment when doing so. U joints were fine, however. All bellows replaced. Shaft lubed up, everything put back together. Changed out drive fluid and it was a little old and dark, but not overly smelly and had no water in it at all. Looked fine.
Sound was there before the gimbal replacement, but at a higher rpm. Since then, it has not gotten any worse, but is happening at a lower and lower RPM. Used to be only at WOT/4600, now it's at 3/4 throttle and 4000rpm.
As per Dons' advice, I took off the power steering belt to make sure that it wasn't power steering pressure related. The noise is still there.
So, we are leaning possibly to some kind of carrier bearing in the upper unit? Any suggestions?
This is a cleaned up version of this thread:
http://forums.iboats.com/showthread.php?t=292530
1997 3.0LX Alpha 1 Gen 2
When running above 4300rpm, boat is making a screeching/rubbing/growl noise from the back transom area. At 4000 - 4300, it only does it while turning from side to side. Exactly when you touch the steering wheel, it makes the sound.
We've run with the hatch up, had my mechanic stick his head all in there, and he cannot figure out where exactly it is coming from or what the heck it is. It is coming from the rear of the motor, but not in the motor. Drivelive/transom area.
Purchased the boat last year, and did a dumdum and didn't check the bellows. They were cracked and leaking bad, and as such the gimbal bearing was rusted and shot. Replaced the gimbal bearing, and obviously checked engine alignment when doing so. U joints were fine, however. All bellows replaced. Shaft lubed up, everything put back together. Changed out drive fluid and it was a little old and dark, but not overly smelly and had no water in it at all. Looked fine.
Sound was there before the gimbal replacement, but at a higher rpm. Since then, it has not gotten any worse, but is happening at a lower and lower RPM. Used to be only at WOT/4600, now it's at 3/4 throttle and 4000rpm.
As per Dons' advice, I took off the power steering belt to make sure that it wasn't power steering pressure related. The noise is still there.
So, we are leaning possibly to some kind of carrier bearing in the upper unit? Any suggestions?