Multiquip MQP20P manual Troubleshooting engine, Troubleshooting Engine

Troubleshooting (engine)

Troubleshooting (Engine)

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

MQP20P STANDBY GENERATOR • operation and parts manual — rev. #1 (11/28/11) — page 37