John Gibbons
Recruit
- Joined
- Jul 7, 2019
- Messages
- 4
I just purchased a used 2010 Tahoe Q4 SS (18') with a Mercruiser 4.3L (4 barrel) 190 hp. The market for used boats where I live is very competitive and there was no opportunity for a water test prior to purchase. It has what I believe to be the stock prop (3 blade aluminum, not sure of the pitch or size).
The boat has very poor performance though the engine seems to perform normally. When accelerating I have to rev up to to max RPM (4800) to get the boat on plane and it will only do about 21 mph when trimmed out at that RPM. I have to be careful not to over rev the engine as I hit 4800 RPM at roughly 3/4 throttle.
My initial suspicion was the prop but now I am thinking it might a damage hub or worse, something in the drive itself. I am looking for advice from anyone who has experience a similar issue or some guidance on how to figure out what the issue is.
Thanks
John
The boat has very poor performance though the engine seems to perform normally. When accelerating I have to rev up to to max RPM (4800) to get the boat on plane and it will only do about 21 mph when trimmed out at that RPM. I have to be careful not to over rev the engine as I hit 4800 RPM at roughly 3/4 throttle.
My initial suspicion was the prop but now I am thinking it might a damage hub or worse, something in the drive itself. I am looking for advice from anyone who has experience a similar issue or some guidance on how to figure out what the issue is.
Thanks
John