Howard Sterndrive
Rear Admiral
- Joined
- Nov 5, 2008
- Messages
- 4,603
I just picked up a new Michigan Apollo XHS 4 blade stainless prop for my 92 V6 Mercruiser (50 or so hours on my SEI Gen 2 drive).
With the new prop, I have a low frequency vibration on cruise that's rumbling through the whole boat. It's not there with the aluminum 20P 4 blade (also Michigan).
I tried a new hub as I had just transferred my old hub to the new prop, but no improvement.
I initially thought it was rubbing, because even at no-wake speed there is a bit of a growl. It just gets more pronounced on plane. No evidence of rubbing though.
Is there anything else I should try before warranty?
My neighbour has a 4.3 Mercruiser in his bowrider.... thinking I'll ask if I can try it on his boat.
looks like a similar thing here:
http://forums.iboats.com/showthread.php?t=439821
same deal, I love the performance of this Apollo, but this rumble can't be doing the lower unit any good.
With the new prop, I have a low frequency vibration on cruise that's rumbling through the whole boat. It's not there with the aluminum 20P 4 blade (also Michigan).
I tried a new hub as I had just transferred my old hub to the new prop, but no improvement.
I initially thought it was rubbing, because even at no-wake speed there is a bit of a growl. It just gets more pronounced on plane. No evidence of rubbing though.
Is there anything else I should try before warranty?
My neighbour has a 4.3 Mercruiser in his bowrider.... thinking I'll ask if I can try it on his boat.
looks like a similar thing here:
http://forums.iboats.com/showthread.php?t=439821
same deal, I love the performance of this Apollo, but this rumble can't be doing the lower unit any good.