Just some thoughts based on our 3GM with Sender fresh water cooling 1) It is not normal for any hose to be dry
2) Check the fluid level in the Sendur heat exchanger. Run engine without radiator cap until thermostat opens allowing full coolant flow. Top off with anti freeze as needed. This is the engine side of the system – not the water. Check to verify fluid is moving in exchanger. If system has been drained, there may be an air pocket somewhere that needs to be pushed out by fluid. Exchanger fluid level should be absolutely full when warm. There should be a plastic overflow / expansion tank connected to exchanger just under cap. Should have 1 – 2 inches of coolant. 3) Are you getting water out the exhaust?? If so then water side of system is probably OK. If not, common issue Is exhaust riser water passage gets blocked. Fix is replace riser Best of luck – the 3GM is a great engine John and Maryann Legacy III 1982 C&C 34 Noank, CT
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