I have a 2002 Fourwinns Freedom with a Volvo Penta 3.0L SX. I replaced the impeller in the fall as part of my yearly tune up. Before heading out, I usually perform a test with the muffs. I'm glad I did because something has gone wrong as it is overheating and the impeller starts to squeal.
I began my diagnostics by putting clear hoses on the sea pump and I ran with the muffs. There is no water flow coming in. I then connected a water hose to the pump inlet with low pressure to bypass the lower unit and it runs great. I then connected the water hose to the hose running to the lower unit. It flows freely out the intake holes. I also taped up the intake (and the single hole) and listen for leaks, nothing obvious. I still need to bypass the lower unit by connecting a hose to the pump intake to a bucket of water to see if the impeller can suck it up.
I do have a question though. When I connect the muffs to the lower unit and disconnect the hose from the pump inlet, should water flow freely out the open hose? I get no water from the pump side at all, but it flows freely out the other way. This seems odd.
I began my diagnostics by putting clear hoses on the sea pump and I ran with the muffs. There is no water flow coming in. I then connected a water hose to the pump inlet with low pressure to bypass the lower unit and it runs great. I then connected the water hose to the hose running to the lower unit. It flows freely out the intake holes. I also taped up the intake (and the single hole) and listen for leaks, nothing obvious. I still need to bypass the lower unit by connecting a hose to the pump intake to a bucket of water to see if the impeller can suck it up.
I do have a question though. When I connect the muffs to the lower unit and disconnect the hose from the pump inlet, should water flow freely out the open hose? I get no water from the pump side at all, but it flows freely out the other way. This seems odd.
