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Water Psi on 2018 Mercury 250 Pro XS

Posted By: Bassattak

Water Psi on 2018 Mercury 250 Pro XS - 07/26/21 01:42 PM

Hey All,

Looking for the water psi. I should be seeing on my 2018 Mercury 250 Pro XS 4-stroke at WOT?
Posted By: Pat Goff

Re: Water Psi on 2018 Mercury 250 Pro XS - 07/26/21 01:49 PM

15 is my low number at WFO. There's some that are happy with 12.
Posted By: Bassattak

Re: Water Psi on 2018 Mercury 250 Pro XS - 07/26/21 03:09 PM

Thanks. Appears i may have an issue. I have a pretty decent stream of water from the Pee hole but PSI only ranges from 1.0-1.9. This is on the analog gauge and also the Mercury smart gauge. Engine Temp runs around 130-140 degrees
Posted By: Pat Goff

Re: Water Psi on 2018 Mercury 250 Pro XS - 07/26/21 04:27 PM

It's just a tube that forces water to a diaphragm in the gauge. Typically some buckethead has crimped the tube with a zip tie.
Posted By: boatman025

Re: Water Psi on 2018 Mercury 250 Pro XS - 07/26/21 09:07 PM

Have you put a impeller in
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