A Mercury outboard water pump is a engine cooling system. A outboard water pump is what blows steam through to get the car cool,
does the lower unit need to be removed to replace the water pump on a 1995 Johnson 115 hp outboard engine
Every two years to be safe
if your water pump fails, engine will overheat. You will have no heat in vehicle.
The 15 horsepower Mercury outboard motor does not have a water pump. The outboard motor is air cooled and does not have a need for circulating water.
This depends on what engine you are working on.
If referring to an outboard engine, running the motor without water supplied will ruin a water pump in less than 60 seconds. Never dry run a marine engine.
no but if you try to run the car with the water pump out you could overheat your engine
The gearcase assembly on an outboard engine is sealed, and draining is not needed. If however, the gear lube has not been changed in a while, during the water pump replacement is generally a good time to do so.
A trim pump allows your outboard engine to lift off the water on a Y axis. As your craft gains momentum, you can lift it a bit to ensure you have as much thrust as you can have.
easiest way to tell if water pump is working is to run engine until at running temp. then carefully remove radiator cap. with someone slightly reving engine, look into radiator. if the pump and thermostat are working correctly, you will see the coolant moving(circulating) in the radiator
with tools.