★★★★★ 5
Works as it should
Works as it should
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
O-Ring 180mm x 188mm x 4mm - Viton (80) Black
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
O-Ring 180mm x 188mm x 4mm - Viton (80) BlackProduct Details : O Ring 180mm x 188mm x 4mm Viton (80) Black Part No: MOR1800040 V Product Category: O Rings Product Type: O Ring Standards: Standard Material(s): Viton Material Code: FPM Color: Black Durometer: 80 Temperature Range: 13F to +428F ( 25C to +220C) System Of Measurement: METRIC Dimensions: 180mm x 188mm x 4mm Interior Diameter (d): 180mm Outside Diameter (D): 188mm Cross Section (S): 4mm For any information about products, please
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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Based on 1770 reviews
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Product Reviews
★★★★★ 4
Four Stars
Just what I needed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 14, 2016
★★★★★ 5
Functioned as advertized.
Installed these in my Whalers 96 200 Offshore. No issues, used permatex gasket compound on aluminum engine parts after cleaning with fine brass wire wheel.
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Reviewed in the United States on November 20, 2024
★★★★★ 5
Fits 1988 Sea Ray V-135 2 stroke (Mercury)
For those of you with the 135 hp
mercury that was branded as the "Sea Ray 135" and paint matched to the boat (i.e. Seville's and some others) this is the 147 degree thermostat for that motor. My Seville is an '88 and It's difficult to cross reference the serial numbers on those motors when searching for parts. Only buy Quicksilver parts for these motors. Happy to find them on Amazon because Boats.net as an example, is not clear on what you're getting.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 3, 2024
★★★★★ 5
fixed issue
stopped the overheat issue on my outboard!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 6, 2025
