Wiseco 40108M10000 Forged Piston Kit Sea-Doo 1503cc 4-TEC 10:1 High Compression Standard Bore 99.94mm

The Wiseco 40108M10000 is a high-compression forged piston kit designed for Sea-Doo 1503cc 4-TEC personal watercraft engines. Built to a 10:1 compression ratio at a standard bore of 99.94mm (100mm nominal), this kit is an ideal upgrade for naturally aspirated 4-TEC applications where increased compression and durability are priorities.

All Wiseco pistons are forged from high-silicon, low-expansion aluminum alloy, providing superior tensile strength, reduced reciprocating weight, and improved heat transfer compared to cast alternatives. Each piston features Wiseco's ArmorGlide skirt coating to minimize friction and extend service life under demanding marine conditions.

Kit Includes:

• Forged aluminum piston
• Piston rings
• Wrist pin (piston pin)
• Circlips

Key Specifications:

• Bore Size: 99.94mm (Standard / STD)
• Compression Ratio: 10:1
• Stroke: 63.40mm
• Engine: Sea-Doo 1503cc 4-TEC (3-cylinder)
• Skirt Coating: ArmorGlide
• Material: Forged high-silicon aluminum alloy

Important Installation Note: Wiseco forged pistons require different piston-to-wall clearances than OEM cast pistons. Consult Wiseco's specification sheet and a qualified marine engine builder to set proper clearances before installation.

Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, Ohio, the 40108M10000 delivers the performance and reliability that Wiseco has built its reputation on for over 80 years in powersports engine components.