I just got through doing this after my raw water pumps seal failed without my knowledge and sprayed my generator with salt water
for some indeterminable time, I only found out after it eventually seized.
My Nexgen requires 4 GPM of water flow, the March pump I used if I remember the specs flows 8 GPM at 10' of head. I was concerned this would be too much and I would have to reduce it down, but I didn't. It is obviously more flow, but the generator handles it easily.
Wired directly into the AC output of the generator, pump doesn't run without the generator running so that part is fail safe.
As other have indicated the March pumps must be below water line, they will not prime.
March pump and new mechanical water pump
were about the same price
, March pump has no impellers to fail and clog the heat exchanger, and based on my experience with them on air conditioners, they run longer than my generator will most likely last before failure. Think about it, how many years have you seen them run AC's on a boat
in the Marina?
I see no downside to this, and makes me wonder why generators don't come this way? I guess it's another thing to wire and install where a manual pump isn't?
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