Troubleshooting (Engine) - MULTIQUIP Power MQP20P Operation And Parts Manual

Symptom
Engine will not start or start is delayed,
although engine can be turned over.
At low temperatures engine will not start.
Engine fires but stops soon as starter is
switched off.
Engine stops by itself during normal
operation.
Low engine power, output and speed.
MQp20p STaNDBY geNeRaTOR • OpeRaTiON aND paRTS MaNual — Rev. #1 (11/28/11) — page 37

trOubLEShOOtIng (EngInE)

Troubleshooting (Engine)
Possible Problem
No Fuel reaching injection pump?
Defective fuel pump?
Fuel filter clogged?
Faulty fuel supply line?
Compression too low?
Fuel pump not working correctly?
Oil pressure too low?
Low starting temperature limit exceeded?
Defective battery?
Air or water mixed in fuel system?
Engine oil too thick?
Defective battery?
Fuel filter blocked?
Fuel supply blocked?
Defective fuel pump?
Fuel tank empty?
Fuel filter blocked?
Defective fuel pump?
Mechanical oil pressure shutdown sensor
stops the engine due to low oil?
Fuel tank empty?
Fuel filter clogged?
Fuel tank venting is inadequate?
Leaks at pipe unions?
Speed control lever does not remain in
selected position?
Engine oil level too full?
Injection pump wear?
Solution
Add fuel. Check entire fuel system.
Replace fuel pump.
Replace fuel filter and clean tank.
Replace or repair fuel line.
Check piston, cylinder and valves. Adjust or
repair per engine repair manual.
Repair or replace fuel pump.
Check engine oil pressure.
Comply with cold starting instructions and
proper oil viscosity.
Charge or replace battery.
Check carefully for loosened fuel line
coupling, loose cap nut, etc.
Refill engine crankcase with correct type of
oil for winter environment.
Replace battery.
Replace fuel filter.
Check the entire fuel system.
Replace fuel pump.
Add fuel.
Replace fuel filter.
Replace fuel pump.
Add oil. Replace low oil shutdown sensor if
necessary.
Replace fuel filter.
Replace fuel filter.
Ensure that tank is adequately vented.
Check threaded pipe unions tape and tighten
unions a required.
See engine manual for corrective action.
Correct engine oil level.
Use No. 2-D diesel fuel only. Check the fuel
injection pump element and delivery valve
assembly and replace as necessary.