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Eliminating Water Heater from Mercury Engine 7.4 MPI


Wanted to share the photos and how to eliminate the engine coolant from going through the water heater. My water heater on my Voyager 370 started leaking water and I was not comfortable having the engine coolant go ing through the water heater so I looped the connections on the engine with a piece of 5/8" silicone heater hose that is rated at 350 degrees and high pressure, yes the hose is better than you need but worth the extra 10 bucks.

Left the hoses going to the water heater in case we hook one back up and ran the new hose by the hoses and made sure the new hose was not coming into contact with anything that would rub a hole in it.

Pictures attached.

This also allows us to remove the old water heater and replace with something in the future.

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