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WSM Mercury/Mariner 30-300 HP Lower Unit Bushing 447-318, 23-77631A 2, 18-2155

Marsoni M251S
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WSM Mercury/Mariner 30-300 HP Lower Unit Bushing 447-318, 23-77631A 2, 18-2155ITEM#: 447 318 BUSHING, LOWER UNIT MERCURY MARINER 30 300 HP OEM#: 18 2155, 23 37428A1, 23 77631A 2 BRAND: WSM FITMENTS: Make Model Year(s) Mariner ALL Mercury 2 Cyl 2. 875 Bore Cross Flow 35 1984 1989 Mercury 2 Cyl 2. 875 Bore Cross Flow 40 1980 1983 Mercury 3 Cyl 2. 875 Bore Cross Flow 50 1983 1990 Mercury 3 Cyl 2. 875 Bore Cross Flow 60 1984 1990 Mercury 3 Cyl 2. 875 Bore Cross Flow 70 1976 1983 Mercury 4 Cyl 2. 565 Bore Cross Flow 30 1989 1997
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4.3 ★★★★★
Based on 153 reviews
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Verified Purchase
judith stevens
Lowell, US
★★★★★ 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
K
Verified Purchase
Kimberly matthews
West Palm Beach, US
★★★★★ 2
Quality control lacking
One tee conector was missing. Nothing avaliable locally that fits.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 13, 2025
A
Verified Purchase
Alexandra
Draper, US
★★★★★ 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
E
Verified Purchase
Eric
Charlottesville, US
★★★★★ 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
C
Verified Purchase
Carl L. Bradley
Omaha, US
★★★★★ 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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