I'm not 100% convinced the engine is overpowering the impeller.
The old Buick motors arnt what I'd call a powerhouse.
You really need to pull the pump unit and measure the clearances
On the Seapoos I have played with, a wear ring that looks good means night and day between one with the correct clearances.
Most wear will be in the front end so viewing from the rear prob isn't the best indication.
Bookmarks