Yanmar N18 Injector
Mega Marine supplies genuine and reconditioned injector for Yanmar N18 marine engines, along with complete engines and a comprehensive range of spare parts. Fast RFQ response and global delivery.
The fuel injector atomises and injects precisely timed doses of pressurised fuel oil directly into the combustion chamber. The assembly comprises a nozzle holder body, needle valve, spring, and multi-hole nozzle tip — typically 8-12 holes of 0.3-0.4mm diameter in large 2-stroke engines — producing the spray pattern matched to the combustion chamber geometry. Opening pressure is set at 250-400 bar.
Function in the Engine
Atomises fuel oil into the optimal fine spray pattern for efficient combustion, controls injection timing and duration precisely with each engine cycle, maintains a fuel-tight seal against combustion back-pressure between injection events.
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
Nozzle spray hole erosion increasing hole diameter and degrading spray quality, needle valve sticking from contaminated or low-lubricity fuel, dribbling between injections causing combustion deposits and black smoke, spring fatigue reducing opening pressure, needle seizure from thermal distortion.
Mega Marine supplies genuine OEM and quality reconditioned injector 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
- Injector
- Condition
- Genuine & Reconditioned
Browse the full N18 parts range.
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