Part of the Yanmar Operator Manuals.
All 523 pages of this Yanmar 6N18(A)L-V operation manual PDF focus on one machine: the 6N18(A)L-V marine auxiliary engine, from cold startup through full load operation at sea. Packed with torque tables, clearance specs, and a maintenance chapter that walks through every inspection interval, this is the reference Yanmar hands its own engineers. Tighten the cylinder head nuts to 58.8 ± 0.5 MPa; torque the fuel injection nozzle sleeve to 157~167 N-m on MDO or 245~265 N-m on HFO. No more guessing at limits in the engine room. Bookmarked by section and keyword-searchable: grab your tablet, open the manual, get the right number before you touch a wrench.
What's Inside This Manual
| System | Pages |
|---|---|
| Front Matter & Preface | 1-22 |
| Engine Description | 23-34 |
| Structure of Major Parts | 35-36 |
| Table of Engine Standard Adjustments | 37-39 |
| Operation | 40-65 |
| Fuel Oil, Lub. Oil & Cooling Water | 66-67 |
| Maintenance Checking | 68-108 |
| Maintenance Servicing | 109-168 |
| Principal Dimensions & Part Mass | 169-172 |
| Table of Tightening Torques of Major Bolts | 173-177 |
| Clearances & Wear Limits of Major Parts | 178-182 |
| Troubleshooting & Countermeasures | 183-189 |
| Parts List & Attached Figures | 190-523 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head tightening nut | 58.8 ± 0.5 MPa (600 ± 5 kgf/cm²) | p. 173 |
| Connection rod bolt | 49(5) N-m (kgf-m) 120+3 -0 (deg.) | p. 173 |
| Fuel injection valve nozzle sleeve torque (MDO) | 157 ~ 167 N-m (16 ~ 17 kgf-m) | p. 174 |
| Fuel injection valve nozzle sleeve torque (HFO) | 245 ~ 265 N-m (25 ~ 26 kgf-m) | p. 174 |
| Exhaust manifold clamping bolt torque | 59 ~ 69 N-m (6 ~ 7 kgf-m) | p. 503 |
| Exhaust expansion joint clamping bolt torque | 59 ~ 69 N-m (6 ~ 7 kgf-m) | p. 503 |
| Suction valve seat interference | 0.045 ~ 0.095 mm | p. 125 |
| Exhaust valve seat interference (59 Φ part) | 0.039 ~ 0.072 mm | p. 125 |
| Starting air pressure alarm setting value | 0.65(6.6) MPa(kgf/cm²) | p. 38 |
| Total cylinder displacement | 42.75 L | p. 23 |
| Engine mass (singly) | 6,500 kg | p. 23 |
| Fuel injection pressure | 34.0 ± 0.5 MPa | p. 37 |
