Raw Water Pump
 

...anybody know why my volvo outdrive will not pick-up water to the raw water pump, i replaced the circulation pump and thermostat but still no suction to feed the engine...i hose fed the raw water pump by disconnecting the outdrive feed and had water exhaust with no problem...need help,cold weather coming can't properly winterize.

Lee 1995 Devanti 23.5 5.8fl ford....about 100 hrs of salt water use... Plymouth Ma.

Re: Raw Water Pump
 

See if this solves the problem. The engine picks up cooling water through the out drive. The intake is in the lower unit, there is an internal passage in the drive and at about the midpoint there is a fitting that has a hose connected to it. This fitting can corrode, particularly in saltwater use and you get an air leak. At displacement speed the fitting is submerged so no problem. At planing speed this fitting breaks the surface and now you will have a problem.

Easy way to check without hauling the boat is to connect a clear hose before the pump, test and see if you get air bubbles.

Re: Raw Water Pump
 

mikeyt, thank you for the reply i will try your suggestion, i will inform you of the outcome and thaks again

Lee

Re: Raw Water Pump
 

mikeyt, thanks for the reply i will try your suggestion and let you know of the outcome, thanks again

Lee