The 3Y9-00004-0 Piston (0.5 mm O/S) is a genuine OEM replacement piston designed for compatible Tohatsu 2-stroke outboard motors. This 0.5 mm oversize (O/S) piston is intended for engines with a rebored cylinder, restoring proper compression, combustion efficiency, and engine performance during a top-end rebuild or complete overhaul. The original part number 3Y9-00004-0 has been superseded by 3Y9000041M. Manufactured from high-quality aluminium alloy to Tohatsu's original specifications, the 3Y9-00004-0 Piston provides excellent durability, heat dissipation, and precise OEM fitment for reliable performance in demanding marine environments.
Gear Case & Crank Shaft (Tohatsu)
Piston (0.5 mm O/S)
Brand: Tohatsu
SKU: 3Y9-00004-0
$482.35
Key benefits
- Tohatsu MD70B
- Tohatsu MD90B
- and other compatible models using the same piston and crankshaft assembly.
- Always verify compatibility using your engine model and serial number before ordering.
Shipping
Ships Australia-wide