Piston Ring 66T-11603-00 for Yamaha T40 40HP Piston STD Set 80MM

This standard piston ring kit serves as a reliable aftermarket spare part marked OEM PN 66T-11603-00. It matches the 80mm STD piston set installed on Yamaha T40 40HP two-stroke marine outboards. Precision machining delivers efficient sealing within cylinder bores. Wear-resistant alloy material withstands continuous marine operation and reduces gas blow-by. All dimensions comply with OEM standards for simple assembly. This ring set recovers adequate compression and maintains stable power output on water.

This is a brand new piston set (STD size) For Yamaha Outboard Motor ,And also for Parsun,Hidea,Seapro,Hangkai,HDX etc 2 strok 40HP ,E40X series.

Ref. Part No: 66T-11631-00

Piston Diameter: 80mm / 3.149in

Wrist Pin: 20mm / 0.787in

It used on:

for Yamaha 40HP E40MH 40X outboard engine

E40MLHW-REV - 1998 E40MLHX - 1999 E40MLHY - 2000 E40MLHZ - 2001---up

Parsun 40HP E40MH 40X boat motor