Not all boats have the ability to dump the tank. Have to have a macerator and it’s an extra option when the boat is purchased new. You would know if you had it because it is a keyed switch that would be located somewhere close to the toilet incorpo...
Also had same alarm due to water flow also. Outdrive sucked up a plastic bag on one side of intake reducing water flow through cooling system. Once removed alarm stopped and engine ran fine.
Mine only had roughly 250 hours, all salt water. I exhausted all avenues before changing manifold. At time mechanic recommended changing both, didn’t listen and second went soon after. My manifolds went after 4 years. Mechanic said Mercury must k...
