66T-11631-00-93 Piston Kit Ring Set STD for YAMAHA 40HP Outboard

The piston is the "heart" of an outboard motor (marine engine). It moves up and down in a reciprocating motion, enduring alternating mechanical and thermal loads, making it one of the most critical components in the engine.

The piston is the "heart" of an outboard motor (marine engine). It moves up and down in a reciprocating motion, enduring alternating mechanical and thermal loads, making it one of the most critical components in the engine.

The piston is the "heart" of an outboard motor (marine engine). It moves up and down in a reciprocating motion, enduring alternating mechanical and thermal loads, making it one of the most critical components in the engine.

The piston is the "heart" of an outboard motor (marine engine). It moves up and down in a reciprocating motion, enduring alternating mechanical and thermal loads, making it one of the most critical components in the engine.

The piston is the "heart" of an outboard motor (marine engine). It moves up and down in a reciprocating motion, enduring alternating mechanical and thermal loads, making it one of the most critical components in the engine.

The piston is the "heart" of an outboard motor (marine engine). It moves up and down in a reciprocating motion, enduring alternating mechanical and thermal loads, making it one of the most critical components in the engine.

The piston is the "heart" of an outboard motor (marine engine). It moves up and down in a reciprocating motion, enduring alternating mechanical and thermal loads, making it one of the most critical components in the engine.