The raw water
circuit suddenly stopped pumping the other day - lucky I was still in the marina!!
is a fresh water
cooled Sole Mini 34 around 23 years old and is running fine. I had been away for a couple of weeks and started the motor
the other day to giver her a run. After about 30 sec I noticed a change in the engine noise
& checked the exhaust
- no water
Double checking the seacock was open (yes) and if there was anything else obviously wrong, I took the impeller out. It looked OK - no craking or any other physical damage. I noticed the face plate for the pump was badly scored (both sides - it's 23 years young!!) and put a new impeller in anyway. Started motor again & still no water.
When I bought the boat a coulple of years ago from Sydney
I got a mechanic
the motor & replace the impeller & put some spares on board for the trip to Hobart. The spare impeller was about 3mm less in depth
than the orignial after comparing, so I guess this would stop the water pumping along with the scored plate.
I ordered a new plate & genuine Sole impeller & gaskets (Johnson & Jabsco
do not make one the same size (depth..)) & will fit on the weekend. While at the boat today I also checked that the sea cock was not blocked and nothing stuck in the hose, Pump body & fittings & heat exchanger
- all clear.
Question - when I put it all back together, how long should it take to get the raw water
pumping through the system as I don't want to kill the new $55 impeller. The water pump is about at water line level so it doesn't have to lift
the water very far. I will lubricate the impeller with gylcerine.
I also turned the motor over to ensure the shaft in the pump was turning (yes).
If it still does't pump - is there anything else I should check before I call the mechanic