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  • New Mercury 150-200 HP DFI V6 3.0L Outboard Lower Unit (1979–2018) – New / Remanufactured image 0
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    Mercury Lower Unit | 150-200 HP V6 3.0L | 1.87:1 SKU: ME-G6-08A-N

    From $2,529.00
    $2,807.19
    From $2,529.00
    The OBR Mercury/Mariner V6 lower unit is a replacement gearcase for selected 150, 175 and 200 HP outboards. Every configuration on this page uses a 1.87:1 gear ratio. Standard-rotation options are available with 20- or 25-inch shafts for supplier-listed 1979–2018 applications. The remanufactured counter-rotation...
    From $2,529.00
    $2,807.19
    From $2,529.00
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  • ME-G3-09-N OBR Mercury 75/90 HP Optimax 20-inch gearcaseOBR Mercury Optimax lower-unit propeller shaft close-up
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    Mercury Outboard Lower Unit | 75-125 HP | 3-Cyl DFI/Optimax 2004-2018 SKU: ME-G3-13-N

    From $2,522.00
    $2,832.72
    From $2,522.00
    The OBR Mercury Optimax lower unit is a replacement gearcase for selected Mercury three-cylinder DFI/Optimax two-stroke outboards. Depending on the selected SKU, applications include 75 HP, 90 HP, 115 HP, and selected 125 HP engines. Both new and remanufactured gearcase options are available, with...
    From $2,522.00
    $2,832.72
    From $2,522.00
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  • "ME-G4-08-R": "OBR ME-G4-08-R remanufactured Mercury 75–90 HP 4-stroke lower unit, 2000–2002 short shift rod, 20-inch L""ME-G4-08A-R": "OBR ME-G4-08A-R remanufactured 2003 Mercury 75–90 HP 4-stroke lower unit, short shift rod, 20-inch L"
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    Mercury Outboard Lower Unit | 75–90 HP | 4-Cylinder 4-Stroke SKU: ME-G4-08-R

    From $2,559.00
    $2,840.49
    From $2,559.00
    The OBR Mercury/Mariner 75–90 HP Four-Stroke Lower Unit is a precision-built new or remanufactured replacement gearcase designed specifically for selected four-cylinder Mercury and Mariner 75 HP and 90 HP four-stroke outboards produced from 2000 through 2006. Engineered to restore peak propulsion and reliable power...
    From $2,559.00
    $2,840.49
    From $2,559.00
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  • SEI SE205 Mercury 70-125 HP replacement lower unitMercury SE205 Outboard Lower Unit | 70–125 HP | SE90-205
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    Mercury SE205 Outboard Lower Unit | 70–125 HP | SE90-205 SKU: SE90-205-A20
    MPN: 90-205-A20

    $1,195.00
    $1,326.45
    $1,195.00
    The SEI Mercury SE205 lower unit is a new aftermarket replacement gearcase for selected Mercury and Mariner 3- and 4-cylinder outboards. The SE205 family includes separate configurations for 2-stroke carbureted, DFI and early four-stroke applications, with 2.07:1 or 2.33:1 ratios and 20-inch or 25-inch...
    $1,195.00
    $1,326.45
    $1,195.00
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  • SEI SE206 Mercury V6 replacement lower unit side view
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    Mercury SE206 Outboard Lower Unit | 2.0L, 2.4L & 2.5L | SE90-206 SKU: SE90-206-A20
    MPN: 90-206-A20

    $1,195.00
    $1,326.45
    $1,195.00
    The SEI SE206 Mercury V6 lower unit is a new aftermarket replacement gearcase for selected Mercury 2.0L, 2.4L and 2.5L V6 outboards using a 4¾-inch gearcase housing. Four configurations are available, combining 1.87:1 or 2.00:1 gear ratios with a 20-inch L or 25-inch XL...
    $1,195.00
    $1,326.45
    $1,195.00
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  • SE216 13-spline and Stub Alpha driveshaft comparison
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    Mercury SE216 Outboard Lower Unit | 3.0L Standard Rotation | SE90-216 SKU: 90-216-A20
    MPN: 90-216-A20

    $1,195.00
    $1,326.45
    $1,195.00
    The SEI SE216 Mercury 3.0L Lower Unit is a premium aftermarket standard-rotation replacement gearcase designed for select Mercury 3.0L V6 outboard engines with serial numbers 1B504989 and lower. Engineered for smooth power transfer and long-lasting durability, it is available in 1.75:1 and 1.62:1 gear...
    $1,195.00
    $1,326.45
    $1,195.00
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  • SEI SE218 Mercury 3.0L counter-rotation lower unit
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    Mercury SE218 Outboard Lower Unit |3.0L Counter-Rotation| SE90-218 SKU: 90-218-A25
    MPN: 90-218-A25

    $1,395.00
    $1,548.45
    $1,395.00
    The SEI SE218 Mercury 3.0L counter-rotation lower unit is a new aftermarket replacement gearcase for selected Mercury 3.0L V6 outboards with serial number 1B504989 and below. It is designed specifically for applications requiring counter/left-hand rotation and is available in 1.75:1 and 1.62:1 gear-ratio configurations....
    $1,395.00
    $1,548.45
    $1,395.00
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  • SEI SE221 Mercury 4.8-inch lower unit full product viewSE221 standard-rotation Mercury gearcase side profile
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    Mercury SE221 Outboard Lower Unit | 3.0L V6 & Verado 4.8-Inch |SE90-221 SKU: 90-221-A20
    MPN: 90-221-A20

    $1,645.00
    $2,070.15
    $1,645.00
    The SEI SE221 Mercury lower unit is a new aftermarket replacement gearcase for selected Mercury outboards using the 4.8-inch torpedo-style housing and a 15-spline propeller shaft. Unlike a single-application gearcase, the SE221 family supports three distinct engine architectures, so the correct configuration must be...
    $1,645.00
    $2,070.15
    $1,645.00
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  • SE228 counter-rotation gearcase opposite-side profile
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    Mercury SE228 Outboard Lower Unit | Counter-Rotation V6 |SE90-228 SKU: 90-228-A25

    $1,865.00
    $2,051.00
    $1,865.00
    The SEI SE228 counter-rotation lower unit is a new aftermarket replacement gearcase for selected Mercury 3.0L V6 two-stroke and legacy Mercury Verado applications using the 4.8-inch torpedo-style gearcase. Seven configurations are available across three engine families, so the correct unit must be selected using...
    $1,865.00
    $2,051.00
    $1,865.00
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  • Mercury Service Manual 3.9-135 HP 1964-1971

    Mercury Service Manual 3.9-135 HP 1964-1971 SKU: ST-B719

    $35.00
    $38.85
    $35.00
    product description:Mercury Service Manual 3.9-135 HP 1964-1971 B719This Mercury Service Manual 3.9-135 HP 1964-1971 B719 is a comprehensive guide that provides detailed information on servicing and repairing Mercury outboard motors. The manual covers a wide range of topics, including engine overhaul, fuel system maintenance,...
    $35.00
    $38.85
    $35.00
  • New Mercury 225-250 HP PRO XS V6 3.0L Torque Master Lower Unit (2013–2018) – Standard Rotation - New & Remanufactured image 0
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    Mercury TorqueMaster 2 Lower Unit | 225–250 HP Pro XS | 20 Inch SKU: ME-G6-25-N

    From $5,929.00
    $6,581.19
    From $5,929.00
    The OBR Mercury TorqueMaster 2 lower unit is a replacement gearcase for selected 2013–2018 Mercury 225 and 250 HP Pro XS 3.0L V6 outboards. This product family is configured for a 20-inch L shaft and a 1.75:1 gear ratio. New and remanufactured versions are...
    From $5,929.00
    $6,581.19
    From $5,929.00
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  • New Mercury 225-250 HP PRO XS V6 3.0L Torque Master Lower Unit (2004–2013) – Standard Rotation – New & Remanufactured image 0
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    Mercury TorqueMaster Lower Unit | 225–250 HP Pro XS | 2005–2013 SKU: ME-G6-23-N

    From $5,334.00
    $6,581.19
    From $5,334.00
    The OBR Mercury 225–250 HP TorqueMaster lower-unit family includes new and remanufactured replacement gearcases in 20-inch L and 25-inch XL shaft configurations. Current OBR listings identify the ME-G6-23 and ME-G6-24 SKU families for selected 2005–2013 TorqueMaster applications. The 20-inch configuration is available as ME-G6-23-N...
    From $5,334.00
    $6,581.19
    From $5,334.00
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  • Counter Rotation Lower Unit ME-G8 Series 1.75 Gear Ratio 5.44 Gearcase Black Silver - Mariners Warehouse
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    Mercury V6/V8 4-Stroke Lower Unit | 1.85:1 SKU: ME-G6-70B-N

    From $6,000.00
    $7,260.00
    From $6,000.00
    The OBR Mercury V6/V8 4-stroke lower unit is a replacement gearcase cataloged for selected 175–300 HP applications requiring a 1.85:1 gear ratio, 4.8-inch gearcase and standard rotation. New and remanufactured options are available. Buyers can select a 20-inch L, 25-inch XL or 30-inch XXL...
    From $6,000.00
    $7,260.00
    From $6,000.00
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  • Counter Rotation Lower Unit ME-G8 Series 1.75 Gear Ratio 5.44 Gearcase Black Silver - Mariners Warehouse
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    Mercury V6/V8 4-Stroke Lower Unit | 1.85:1 SKU: ME-G6-73B-N

    From $5,600.00
    $6,160.00
    From $5,600.00
    The OBR Mercury V6/V8 counter-rotation lower unit family on this page covers selected Mercury-Mariner four-stroke applications that require a 1.85:1 gear ratio. The 4.8-inch configurations are cataloged for selected 175–300 HP V6/V8 applications with 25-inch or 30-inch shafts. The 5.44-inch configurations are cataloged for...
    From $5,600.00
    $6,160.00
    From $5,600.00
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  • Counter Rotation Lower Unit ME-G8 Series 1.75 Gear Ratio 5.44 Gearcase Black Silver - Mariners Warehouse
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    Mercury V8 Counter-Rotation Lower Unit | 250–300 HP SKU: ME-G8-20B-N

    From $6,600.00
    $7,260.00
    From $6,600.00
    The OBR Mercury V8 counter-rotation lower unit is a remanufactured replacement gearcase for selected Mercury 250 HP and 300 HP V8 four-stroke applications requiring a 5.44-inch housing and 1.75:1 gear ratio. Counter-rotation versions are available with 25-inch XL or 30-inch XXL driveshaft lengths and...
    From $6,600.00
    $7,260.00
    From $6,600.00
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