OMC water pump problem

[john b]

I have a 1989 Bayliner Trophy with an OMC Cobra outdrive. I have replaced the internals and the housing of the water pump. Initially I thought the problem was solved but it has come back. There is no water being pumped up. When I remove the hose on the engine with the engine running there is no water comming out of the hose. I've increased the rpm with no luck. I am able to run the boat using the airator pump for cooling. OK I hope I have made my problem clear. ANY SUGESTIONS? null

 

[12Footer]

Re: OMC water pump problem

Take the intake hose off the water pump.Attach it to<br />a garden hose.<br /><br />Turn the water hose on, and observe the flow out of the raw water intake at the hull fitting.. I suspect an obstruction in the raw water intake primarily, but if you had good flow to the pump, check the thermostat. I doubt this is bad, as you state that you can get cooling thru the aireator pump.

 

[clanton]

Re: OMC water pump problem

Did you change impeller in outdrive, and is impeller turning. There is power steering oil cooler between outdrive pump and engine, may be stopped up . There is a plug and screw that look likes oil drain plug on the port side of outdrive if missing most of the water will come out this hole. The hole is for a flushing connector.