$Refractometer Glycol Battery Screen AdBlue$

Refractometer Glycol Battery Screen AdBlue

M251S

$111.74

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

Refractometer Glycol Battery Screen AdBlueDetails: Overview: Designed to test the concentration of ethylene glycol and propylene glycol coolant antifreeze solutions, battery electrolyte, windscreen washer fluids and AdBlue Diesel Exhaust Fluid (DEF). Coolant antifreeze concentration and windscreen washer fluid concentration is measured as the freezing point in degrees Celsius. Lead acid battery electrolyte concentration is measured as Specific Gravity equivalent to a hydrometer reading.

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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.

New York, 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