Thermostat, Invensys, 1/4", 36", SPST, 25A

Marsoni

M251S

$50.70

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

Thermostat, Invensys, 1/4", 36", SPST, 25AThermostats Single pole rated at 25 amps with max temp rating at 107F. Best results are obtained when the bulb is installed in a dry well or groove tube at or immediately before the heater. This is a safety device! If it is found to be out of calibration, do not attempt to perform a field adjustment! Replace bad thermostat with a new one. Product Specifications: Thermostat Type Mechanical Thermostat Application Generic Bulb Diameter 1 4" Bulb Length 3

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The Good: Changing the fluid in the lower unit is a very easy DIY job. This can save you hundreds of dollars each year by doing it yourself. The Bad: You need a special pump to change the oil, and sometimes it comes with the gear lube. Unfortunately this product did not come with it. Luckily my neighbor had an extra one from changing the lube a different boat laying around and was able to use that. The Ugly: If you have to go get the pump, that could cost a few extra dollar but is just an extra nuisance. The pumps are interchangable but you just need to clean it between uses (DON'T MIX DIFFERENT OIL BRANDS)

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Reviewed in the United States on October 28, 2025

Verified Purchase

Joe H.

Chelsea, US

★★★★★ 5

Works fine in outdrive

Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube

Good gear oil. Purple dye for leak detection

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Reviewed in the United States on April 2, 2026

Verified Purchase