WSM Thermostat Mercruiser 165 / 224 Hp - 18-3555, 99155A 1

WSM Thermostat Mercruiser 165 / 224 Hp - 18-3555, 99155A 1

Marsoni

M251S

$24.97

Get it in 3 business days with 1 day shipping. Friday, May 29

WSM Thermostat Mercruiser 165 / 224 Hp - 18-3555, 99155A 1Item#: 18 3555 Thermostat Mercruiser 165 224 Hp OEM#: 99155A 1 Brand: Sierra FITMENTS: Make Model Year(s) Mercruiser 165 ALL Mercruiser 224 ALL Note: 160 F

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I was concerned at first that the clean water/solution tank was small, but it's prefect for my needs. I was able to clean up 4 puppy-pee spots perfectly, and still have half the solution left over that I loaded in. I like that it is really compact so stores easily, that the cord and hose wind up nice and tight, and it can fit in a small space. Cleaning the dirty water tank was a breeze and took 2 minutes. Would recommend for spills and spot cleaning. Very handy and affordable.

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Reviewed in the United States on May 25, 2026