Mercury 135 -200 HP Bottom Guided - 100-19-04PK, 9737T4 .010 SIZE PORT 3.510

Mercury 135 -200 HP Bottom Guided - 100-19-04PK, 9737T4 .010 SIZE PORT 3.510"

Marsoni

M251S

$128.74

Get it in 3 business days with 1 day shipping. Friday, May 29

Mercury 135 -200 HP Bottom Guided - 100-19-04PK, 9737T4 .010 SIZE PORT 3.510"ITEM#: 100 19 04PK PISTON KIT MERCURY MARINER 135 200 HP 90 91 PORT . 010 OVER NOTE: 3. 510" BOTTOM GUIDED BRAND: WSM FITMENTS: Make Model Year(s) Mariner ALL Mercury 6 Cyl 3. 125 Bore 2L 135 1990 1991 Mercury 6 Cyl 3. 125 Bore 2L 150 1990 1991 Mercury 6 Cyl 3. 375 Chrome Bore 2. 4L 175 1990 1991 Mercury 6 Cyl 3. 375 Steel Bore 2. 4L XR 4 150 1990 1991 Mercury 6 Cyl 3. 501 Bore 2. 5L 200 1991 Mercury 6 Cyl 3. 501 Bore 2. 5L EFI 175 1990 1991 Mercury 6

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UPDATE: Two tips broke off when unplugging them from the binding post and are now lodged in. Inexcusable and an utterly poor product. Solid connection in the binding post with no wobble or wiggle. They require some force to insert into the binding post, but once they're in they remain snug. I also tried removing and reinserting a few times and the connection remained solid. I've used other plugs in the past that have a softer tip and easily deform after one or two insertions. These do not have that issue.

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Reviewed in the United States on January 11, 2026