Rareelectrical Powerhead Rebuild Kit Compatible With 1970-1997 Mercury Mariner 20 40 50 Hp 743-5172A6 20Hp 2.565 Bore 0.030" Over Cross Flow 2-4 Cyl 2-Stroke Outboard Piston Gasket Ring Kit Marine

Mercury Mariner Powerhead Rebuild Kit - 20/40/50 HP Cross Flow 0.030" Oversize - Complete powerhead rebuild kit for Mercury and Mariner 20HP, 40HP, and 50HP cross flow outboard engines with 2.565" (65.91mm) bore. Includes pistons, rings, gaskets, and bearings for a complete rebuild. 2-cylinder (20HP) and 4-cylinder (40/50HP) models, 1970-1997. SPECIFICATIONS: - Product Type: Powerhead Rebuild Kit - Bore Size: 2.565" (65.91mm) - Oversize: 0.030" Oversize - Cylinders: 2 (20HP) / 4 (40/50HP) - Block Type: Cross Flow - Engine Type: 2-Stroke Outboard - Condition: New OEM PART NUMBERS: 743-5172A, 743-5172A6, 780-9229A VEHICLE APPLICATIONS: - Mercury 20 HP 2-Cyl 2.565 Bore Cross Flow 1970-1985 - Mercury 20 HP 2-Cyl 2.565 Bore Cross Flow 1972-1979 - Mercury 40 HP 4-Cyl 2.565 Bore Cross Flow 1990-1997 - Mercury 50 HP 4-Cyl 2.565 Bore Cross Flow 1970-1985 - Mariner 20/40/50 HP Cross Flow 1970-1997 ⚠️ IMPORTANT: Verify OEM part number before ordering to ensure proper fitment.

• Compatible with MARINER,MERCURY. Please verify your OEM part number from your original unit to help ensure fitment.
• Replaces: Oem Cross References: / 743-5172A / 743-5172A6 / 780-9229A / Specifications: / Bore Size: 2.565" (65.91Mm) / Oversize: 0.030" Oversize / Cylinders: 2 (20Hp) / 4 (40/50Hp) / Block Type: Cross Flow / Engine Type: 2-Stroke Outboard
• Applications: Mercury Outboard: / - 20 Hp 2-Cyl 2.565 Bore Cross Flow 1970-1985 / - 20 Hp 2-Cyl 2.565 Bore Cross Flow 1972-1979 / - 40 Hp 4-Cyl 2.565 Bore Cross Flow 1990-1997 / - 50 Hp 4-Cyl 2.565 Bore Cross Flow 1970-1985 / Mariner Outboard: / - 20 Hp Cross Flow 1970-1985 / - 40 Hp Cross Flow 1990-1997 / - 50 Hp Cross Flow 1970-1985
• Applications: ...
• Powerhead Rebuild Kit Source: Aftermarket