


WSM SIERRA Gasket Kit, Complete Mercruiser / GM 7.4L - 18-4387, 27-801853
Marsoni
M251S
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Friday, May 29
WSM SIERRA Gasket Kit, Complete Mercruiser / GM 7.4L - 18-4387, 27-801853Item#: 18 4387 Gasket Kit, Complete Mercruiser GM 7. 4L OEM#: 27 801853 Brand: Sierra FITMENTS: Make Model Year(s) Mercruiser ALL Note: Oval Ports
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Your WSM SIERRA Gasket Kit, Complete Mercruiser / GM 7.4L - 18-4387, 27-801853 orders ship within 1-2 business days.
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4.7 ★★★★★
Based on 1551 reviews
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Product Reviews
★★★★★ 1
Some of the components are plastic
This is not a heavy duty application what so ever . One of the flanges broke . We do not recommend this product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 5, 2024
★★★★★ 2
Quality control lacking
One tee conector was missing. Nothing avaliable locally that fits.
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Reviewed in the United States on July 13, 2025
★★★★★ 1
It doesn’t stay in
The pipe keeps coming out. Not worth the money. Not sturdy to hold a top table.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2024
★★★★★ 2
Good finish, poor hardware.
Set screws are poor quality and are sometimes powdercoated on the exposed threads. Leads to striped hex sockets and inability to tighten properly.
Durable finish as evidenced by no visible damage after throwing parts across the shop in frustration.
Ended up running self tapping screws thru parts to complete assembly.
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Reviewed in the United States on February 26, 2024
★★★★★ 1
Kinda flimsy…
Thought the assembly was metal, it’s some kind of PVC.
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Reviewed in the United States on September 22, 2025
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