Yanmar N18 Cam Roller
Mega Marine supplies genuine and reconditioned cam roller for Yanmar N18 marine engines, along with complete engines and a comprehensive range of spare parts. Fast RFQ response and global delivery.
The cam roller assembly — also called the tappet roller or roller follower — rides on hardened camshaft lobes, translating the cam profile geometry into the linear motion that drives fuel injection pumps and exhaust valve actuators. The hardened steel roller runs on precision needle or roller bearings within a guide housing that constrains movement to a true linear path.
Function in the Engine
Follows the camshaft lobe profile to convert rotary cam motion into precise linear reciprocating motion, reduces sliding friction to pure rolling contact at the cam interface, transmits the cam force to the fuel pump element or exhaust valve actuator push rod.
About the Yanmar N18
Yanmar N-series 180mm bore medium-speed engine for propulsion and auxiliary applications in smaller commercial vessels.
Common Issues Requiring Replacement
Roller surface and cam lobe wear from contaminated or insufficient lubrication, roller bearing cage failure and roller breakage from overloading, guide wear causing misalignment of the roller face to the cam lobe, surface fatigue spalling from high Hertzian contact stresses.
Mega Marine supplies genuine OEM and quality reconditioned cam roller for Yanmar N18 engines, with full traceability and global shipping to any port worldwide. We respond to quote requests within 4–6 hours.
- Engine Brand
- Yanmar
- Engine Model
- N18
- Part Category
- Cam Roller
- Condition
- Genuine & Reconditioned
Browse the full N18 parts range.
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