Yanmar 4LHA-HTP Operation Manual page 415

Chapter 3 Fuel Injection Equipment
II. Troubleshooting
Malfunctions
The engine
cannot be
stopped
Note: Main points related to troubleshooting are noted above. Items related to "Additional
Devices are not included.
Causes
1. The magnet valve armature is
stuck in the open position
2. Foreign matter is lodged on the
magnet valve armature's seating
portion
3-1-58
Remedies
Repair or replace
Repair
4LHA Series