818904T1 8M0220957 Mercury Swivel Bracket | Genuine Used Part

🔧 Product Description

Genuine Mercury Swivel Bracket Assembly - Part Numbers: 3408-818904T1 / 1400-8M0220957

A genuine used Mercury swivel bracket for selected 65HP to 125HP outboards using the single-ram power-trim mounting system. The bracket forms the central structural connection between the driveshaft housing, steering arm and transom-bracket assembly.

Mercury progressively updated this casting through several OEM revisions, with 8M0220957 being the current service replacement for the original 818904-series bracket.

⚙️ Key Features

• Genuine Mercury heavy-duty swivel bracket assembly
• Original part number 3408-818904T1 with current replacement 1400-8M0220957
• Used with selected single-ram power-trim outboard installations
• Supports steering, tilting and engine-load transfer through the midsection
• Applicable to selected 3-cylinder, 4-cylinder, Jet and four-stroke Mercury / Mariner platforms

🚤 Compatibility

Commonly used on

• Mercury and Mariner single-ram power-trim swivel-bracket assemblies
• 3-cylinder and 4-cylinder outboard midsections
• EFI, four-stroke, Jet and carburetted platforms using the 818904-series bracket

Typically suits

• Engine models:
• Mercury / Mariner 65 Jet - serial 0G760300 to 0T979999
• Mercury / Mariner 65 Jet international - serial 0P017000 to 0P325499
• Mercury / Mariner 75HP 3-cylinder - serial 0G760300 to 0T979999
• Mercury / Mariner 75HP 3-cylinder international - serial 0P017000 to 0P325499
• Mercury / Mariner 75HP four-stroke - serial 0G960500 to 0T800999
• Mercury / Mariner 75HP four-stroke Bodensee - serial 0G960500 to 0T800999
• Mercury / Mariner 80 Jet - serial 0G760300 to 0T979999
• Mercury / Mariner 80 Jet international - serial 0P017000 to 0P325499
• Mercury / Mariner 90HP 3-cylinder - serial 0G760300 to 0T979999
• Mercury / Mariner 90HP 3-cylinder international - serial 0P017000 to 0P325499
• Mercury / Mariner 90HP four-stroke - serial 0G960500 to 0T800999
• Mercury / Mariner 100HP 4-cylinder - serial 0G760300 to 0G965520
• Mercury / Mariner 100HP 4-cylinder international - serial 0P017000 to 0P058999
• Mercury / Mariner 115HP 4-cylinder - serial 0G760300 to 0T979999
• Mercury / Mariner 115HP 4-cylinder international - serial 0P017000 to 0P325499
• Mercury / Mariner 115HP EFI four-stroke - serial 0T178500 to 0T800999
• Mercury / Mariner 125HP 4-cylinder - serial 0G760300 to 0T979999
• Mercury / Mariner 125HP 4-cylinder international - serial 0P017000 to 0P325499
• HP Range: 65HP - 125HP
• Engine Type: Mercury / Mariner carburetted, EFI and four-stroke outboard with selected Jet applications
• Year Range: Approximately 1994 - 2006, dependent on model and serial number

🔌 Function

The swivel bracket carries the outboard midsection and steering arm between the port and starboard transom brackets. It permits steering rotation and controlled tilt movement while transferring propeller thrust, engine weight and trim loads into the boat transom.

⚠️ Common Signs of Failure

• Excessive side-to-side steering movement
• Cracked casting around the steering-arm or yoke mounting area
• Corrosion and pitting around pivot bores or grease passages
• Seized swivel movement caused by worn or contaminated bushes
• Uneven trim movement or visible bracket misalignment

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 1400-8M0220957 → Supersedes 1400-8M0107419
• 1400-8M0107419 → Supersedes 1400-8M0088881
• 1400-8M0088881 → Supersedes 1400-898032A03
• 1400-898032A03 → Supersedes 3408-881919T01
• 3408-881919T01 → Supersedes 3408-818904T1
• 3408-818904T1 → Supersedes 3408-818904A1

OEM / Related Numbers

• 1400-8M0220957
• 8M0220957
• 1400-8M0107419
• 8M0107419
• 1400-8M0088881
• 8M0088881
• 1400-898032A03
• 898032A03
• 3408-881919T01
• 881919T01
• 3408-818904T1
• 818904T1
• 3408-818904A1
• 818904A1
• 99661A35 - Related swivel arm
• 42961A06 - Related lower yoke

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated