Our boat has a Nissan
. We have a Jabsco
pump. We had the first one rebuilt and bought a new spare. The rebuild
started leaking so we put on the new pump and it shortly thereafter started leaking. Belt is properly tensioned and the pulley is aligned. From the Jabsco
manual it says ball bearing pumps can spin at 5,000 rpm
and we're not close to that as the crankshaft pulley and the pump pulley are close in size.
One thing that is noticeable is that our water volume going through the exhaust
is huge compared to other boats. Maybe need a bigger pulley and slow the speed down?
Any ideas why the pumps keep leaking?