Multiquip MQD2H manual Engine Troubleshooting

Page 27

 

 

 

TROUBLESHOOTING

 

 

 

 

 

 

 

TABLE 8. ENGINE TROUBLESHOOTING

 

 

 

 

 

 

 

SYMPTOM

POSSIBLE PROBLEM

SOLUTION

 

 

 

 

 

 

 

Difficult to start

 

 

 

 

 

 

 

 

 

 

Ignition plug being bridge?

Check ignition system.

 

 

 

 

 

 

 

Fuel is available but spark plug

Carbon deposit at ignition?

Clean or replace ignition.

 

 

 

 

 

 

will not ignite. (Power available

Short circuit due to defective

Replace insulators.

 

 

at high tension cable).

 

 

insulators?

 

 

 

 

 

 

 

 

 

 

 

 

 

Improper spark gap?

Set spark plug gap to the correct gap.

 

 

 

 

 

 

 

Fuel is available but spark plug

Short circuit at stop switch?

Check stop switch circuit. Replace stop switch if defective.

 

 

will not ignite. (Power NOT

 

 

 

 

 

 

 

 

available at high tension cable).

Ignition coil defective?

Replace ignition coil.

 

 

 

 

 

 

 

 

Muffler clogged with carbon

Clean or replace muffler.

 

 

 

deposits?

 

 

 

 

 

 

 

 

 

Mixed fuel quality is

Check fuel to oil mixture.

 

 

Fuel is available and spark plug

inadequate?

 

 

 

ignites (compression normal).

 

 

 

 

Fuel in use inadequate (water,

Flush fuel sytem and replace with fresh fuel.

 

 

 

 

 

 

dust)?

 

 

 

 

 

 

 

 

 

Air Cleaner clogged?

Clean or replace air cleaner.

 

 

 

 

 

 

 

 

Defective cylinder head gasket?

Tighten cylinder head bolts or replace head gasket.

 

 

Fuel is available and spark plug

 

 

 

 

Cylinder worn?

Replace cylinder.

 

 

ignites (compression low ).

 

 

 

 

 

 

 

Spark plug loose?

Tighen spark plug.

 

 

 

 

 

 

 

Operation not satisfactory

 

 

 

 

 

 

 

 

 

 

Air cleaner clogged?

Clean or replace air cleaner.

 

 

 

 

 

 

 

Not enough power available

Air in fuel line?

Bleed (remove air) from fuel line.

 

 

 

 

 

 

(compression normal, no miss-

Fuel level in carbureator float

 

 

 

firing).

Adjust carbureator float

 

 

chamber improper?

 

 

 

 

 

 

 

 

 

 

 

 

Carbon deposits in cylinder?

Clean or replace cylinder

 

 

 

 

 

 

 

 

Ignition coil defective?

Flush fuel sytem and replace with fresh fuel.

 

 

Not enough power available

 

 

 

 

Ignition plug often shorts?

Replace ignition wires, clean ignition.

 

 

(compression normal, miss-

 

 

 

 

 

 

firing).

Fuel in use inadequate (water,

Flush fuel sytem and replace with fresh fuel.

 

 

 

 

 

 

dust)?

 

 

 

 

 

 

 

 

 

Excessive carbon depostion in

Clean or replace crankcase.

 

 

 

combustion chamber?

 

 

 

 

 

 

 

 

Engine overheats.

Exhaust or muffler clogged with

Clean or replace muffler.

 

 

 

carbon.

 

 

 

 

 

 

 

 

 

Spark plug heat value incorrect?

Replace spark plug with correct type spark plug.

 

 

 

 

 

 

 

 

 

 

 

MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 27

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Contents Models MQD2H MQD3H Proposition 65 Warning Page Table of Contents MQ-D2H/D3H Gasoline Powered Diaphragm PumpsOrdering parts has never been easier Parts Ordering ProceduresSafety Messages Safety InformationGeneral Safety Pump Safety Lifting Safety Specifications Specifications PumpDimensions MQ-D2HMQ-D3H Application General InformationContact your nearest Multiquip ComponentsInitial Servicing Basic EngineInspection InspectionHandle Installation SetupMechanical seal to prevent water Starting the Engine Honda engine OperationNormal Shutdown Pump Vacuum Test MaintenanceAltitude. See Tables 4 Rotation of Suction and Discharge Ports Seized Plunger Engine Maintenance Schedule Daily Pump Storage Preparation for LONG-TERM StorageEngine Troubleshooting TroubleshootingEngine Troubleshooting Pump Troubleshooting Xxxxx only Not Used on Explanation of Code in Remarks ColumnQty Description Nameplate and Decals Assy Name Plate and Decals AssyDECAL, MQ Logo DECAL, Grease MonthlyWaterbox and Flap Valve Assy -INCH MQD2H Waterbox and Flap Valve AssyFlapper Valve Assy Suction Priming ChamberPriming Plug Primimg Plug GasketPump Assy -INCH MQD2H -PUMP AssyOIL Seal Internal Retaining Ring 1-1/2Plunger ARM CrankHANDLE, Engine and Wheel Assy -INCH MQD2H -HANDLE, ENGINE, and Wheel Assy MQD3H -WATERBOX and Flap Valve Assy 212300001 Pump Assy -INCH MQD3H Pump Assy170400200 MQD3H HANDLE, ENGINE, and Wheel Assy Engine Mount TBD Bolt MQD3H HANDLE, ENGINE, and Wheel AssyAIR Cleaner Assy Honda GX120K1QX2 Engine AIR Cleaner AssyGASKET, Elbow GROMMET, AIR CleanerCOLLAR, AIR Cleaner Collar B, AIR CleanerCamshaft Assy Honda GX120K1QX2 Engine Camshaft AssyLIFTER, Valve SPRING, Weight ReturnROD, Push ARM, Valve RockerCarburetor Assy Honda GX120K1QX2 Engine Carburetor AssyFloat SET PLATE, Lever SettingGasket SET Valve SET, FloatControl Assy Honda GX120K1QX2 Engine Control AssySPRING, Throttle Return ARM, GovernorROD, Governor SPRING, GovernorCrankcase Cover Assy Honda GX120K1QX2 Engine Crankcase Cover AssyPIN A, Dowel GASKET, Case CoverGASKET, OIL Filler CAP BEARING, Radial BallCrankshaft Assy Honda GX120K1QX2 Engine Crankshaft AssyCRANKSHAFT, H-TYPE Cylinder Barrel Assy Honda GX120K1QX2 Engine Cylinder Barrel AssySHAFT, Governor ARM WEIGHT, GovernorPIN, Governor Weight SLIDER, GovernorCylinder Head Assy Honda GX120K1QX2 Engine Cylinder Head AssyCOVER, Head GUIDE, Valve OS OptionalCLIP, Valve Guide GASKET, Cylinder HeadFAN Cover Assy Honda GX120K1QX2 Engine FAN Cover AssyPLATE, Side OIL Alert GROMMET, Adjusting CoverWIRE, Stop Switch 370MM COVER, FAN *NH1* BlackFlywheel Assy Honda GX120K1QX2 Engine Flywheel AssyNUT, Special 14MM FAN, CoolingPULLEY, Starter FlywheelFuel Tank Assy Honda GX120K1QX2 Engine Fuel Tank AssyGASKET, Fuel Filler CAP RUBBER, Supporter 107MMJOINT, Fuel Tank TANK, Fuel *NH1* BlackIgnition Coil Assy Honda GX120K1QX2 Engine Ignition Coil AssyCoil ASSEMBLY, Ignition Muffler Assy Honda GX120K1QX2 Engine Muffler AssySCREW, Tapping MufflerPROTECTOR, Muffler GASKET, MufflerPiston Assy Honda GX120K1QX2 Engine Piston AssyPISTON, OS BOLT, Connecting RODRing SET, Piston Standard PISTON, StandardRecoil Starter Assy Honda GX120K1QX2 Engine Recoil Starter AssyGUIDE, Ratchet SCREW, SettingREEL, Recoil Starter RATCHET, StarterGasket KIT Assy Honda GX120K1QX2 Engine Gasket KIT Assy06111ZH7405 Labels Assy Honda GX120K1QX2 Engine Labels AssyMARK, OIL Alert E EmblemLABEL, Caution MARK, ChokeFreight Policy Terms and Condition of Sale PartsPage HERE’S HOW to GET Help

MQD2H specifications

The Multiquip MQD2H is a versatile and robust diesel-powered generator designed to cater to a wide range of applications, making it a staple for construction sites, emergency backup, and outdoor events. Engineered with advanced technologies, this generator is built to deliver reliable power and withstand challenging environments.

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Safety is also a priority with the Multiquip MQD2H. The generator incorporates automatic shutdown features for low oil pressure and high engine temperature, protecting the unit from potential damage. This built-in safety mechanism provides peace of mind for operators, knowing that the generator is safeguarded against operational hazards.

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