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Thermostat Kit (140°F) for MerCruiser V6 & V8 non-high performance GM engines with standard cooling

Marsoni M251S
Sale price$40.95
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Get it in 3 business days with 1 day shipping. Friday, May 29
Thermostat Kit (140°F) for MerCruiser V6 & V8 non-high performance GM engines with standard coolingFor over 40 years, Engineered Marine Products has been successfully serving both the OEM and marine after market by providing superior quality, reliable, and competitive marine products at affordable prices. We're pleased to be appointed as UK Distributor for this brand. This six piece EMP Thermostat Kit is for 1983 onwards MerCruiser V6 & V8 non high performance GM based engines with standard cooling systems (140F). Replaces: Mercury Pt. No. 807252Q4
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  • We offer a 30-day return/exchange service after receiving.
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4.6 ★★★★★
Based on 2257 reviews
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Verified Purchase
Joey Kapinos
Lake Worth, US
★★★★★ 4
Shelf is sturdy and made of good material, easy to assemble , LED strip could be better
Size: 24 x 6, Color: Black-rgb, Size: 24 x 6, Color: Black-rgb
The shelf is built of solid material and it is very easy to assemble and also install. The LED strip is okay, nothing special and if you don't flick the actual switch on/off of the battery pack your batteries will drain EXTREMELY FAST; the RGB will start flashing making it seem unusable/defective because the controller won't function properly either when in reality it's just dead batteries. I'd probably buy other LED strips that are of higher quality, rechargable and have more features if I were to purchase these again in the future. Pleased with the purchase overall though.
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Reviewed in the United States on May 14, 2026
K
Verified Purchase
katie casey
Charlottesville, US
★★★★★ 5
Great shelves and very sleek
Size: 31 x 7, Color: Black-rgb
Love these shelves so much. They have been holding up my Lego flower collection beautifully
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Reviewed in the United States on February 2, 2026
I
Verified Purchase
Ivan
Lake Worth, US
★★★★★ 1
wasting your money
Size: 35 x 7, Color: White-rgb
I’m very disappointed with this purchase. The shelves have a questionable finish - honestly, you can get something cheaper and much better quality at IKEA. But the biggest issue is the lighting. None of the lights work. I put in brand-new batteries and absolutely nothing happens. I wouldn’t recommend wasting your money on this product.
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Reviewed in the United States on November 13, 2025
M
Verified Purchase
MemoJuan13
Alexandria, US
★★★★★ 3
Lights stop working after a few usage
Size: 31 x 7, Color: Black-rgb
I had these shelves for a few months now. The shelves are great and are very easy to install. I also like that they offer different sizing, so depending what you are storing on them. They can fit a lot of items and are sturdy so you don’t have to worry about it falling. The lights were amazing at first and the main reason why I bought this product, but after a few times using them they stopped working completely and no longer connect.
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Reviewed in the United States on November 11, 2025
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Verified Purchase
polly becker
New York, US
★★★★★ 2
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Incomplete kit. Missing anchors. LED are white not yellow or amber. Shelf is dented. Had to buy double sided tape for the LEDs to stick. Strips can't hold weight of charging blocks. Not easy to install
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Reviewed in the United States on May 16, 2026

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