★★★★★ 4
Good value for the price
Color: Black, Size: 1
A good fit and good value for the money
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
WSM ENGINE COUPLER MERCRUISER 4 - Triangle Style- 337-420, 18643A5
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
WSM ENGINE COUPLER MERCRUISER 4 - Triangle Style- 337-420, 18643A5ITEM#: 337 420ENGINE COUPLERMERCRUISER 4 8 CYLINDEROEM#: 18643A5 Flex plate style for late models, small crankshaft bolt pattern style engine BRAND: WSM FITMENTS: Make Model Year(s) Mercruiser ALL NOTE: TRIANGLE STYLE
Quick Dispatch:
Your WSM ENGINE COUPLER MERCRUISER 4 - Triangle Style- 337-420, 18643A5 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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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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4.2 ★★★★★
Based on 498 reviews
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Product Reviews
★★★★★ 5
Plug That Hole!
Color: Black, Size: 1
I have been very pleased with how well this cover is holding up. It fits snugly into the receiver hole and stays put. Makes the back of the car look so much better and keeps dirt out of the receiver. Good Job! PLUS: I don't have to store the plug in the back of the car any longer! Hinged piece is still nice and flexible.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 12, 2025
★★★★★ 5
Well constructed! Tight Fit.
Color: Black, Size: 1
Great construction, very durable. A bit tight to install, but that is not necessarily a bad thing. It will certainly keep it from ever falling off.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
★★★★★ 5
Easy to install.
Color: Black, Size: 1
Well worth the money and looks great.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Good hitch cover
Color: Black, Size: 1
This is a well made,tight fitting hitch cover but the holding strap is too small to go over the hitch lip so I used my wife’s hair dryer to heat it up a skosh and voila! Fit like a charm! I recommend this cover.
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Reviewed in the United States on February 22, 2026
