troubleshooting

 

 

 

 

 

 

 

Troubleshooting (Engine)

 

Symptom

Possible Problem

Solution

 

 

 

 

Spark plug bridging?

Check gap, insulation or replace spark plug.

 

 

 

 

Carbon deposit on spark plug?

Clean or replace spark plug.

 

 

 

 

Short circuit due to deficient spark plug

Check spark plug insulation, replace if worn.

 

insulation?

 

 

 

Improper spark plug gap?

Set to proper gap.

 

Fuel reaching carburetor?

Check fuel line.

 

Water in fuel tank?

Flush or replace fuel tank.

 

Fuel filter clogged?

Replace fuel filter.

Difficult to start, fuel is available, but no spark

Stuck carburetor?

Check float mechanism.

Spark plug is red?

Check transistor ignition unit.

at spark plug.

 

 

If insufficient compression, repair or replace

 

Spark plug is bluish white?

engine. If injected air leaking, correct leak. If

 

 

carburetor jets clogged, clean carburetor.

 

 

 

 

 

Check transistor ignition unit is broken, and

 

No spark present at tip of spark plug?

replace defective unit. Check if voltage cord

 

cracked or broken and replace. Check if

 

 

 

 

spark plug if fouled and replace.

 

 

 

 

No oil?

Add oil as required.

 

 

 

 

Oil pressure alarm lamp blinks upon starting?

Check automatic shutdown circuit, "oil

 

(if applicable)

sensor". (if applicable)

 

ON/OFF switch is shorted?

Check switch wiring, replace switch.

Difficult to start, fuel is available, and spark is

Ignition coil defective?

Replace ignition coil.

Improper spark gap, points dirty?

Set correct spark gap and clean points.

present at the spark plug.

Condenser insulation worn or short circuiting?

Replace condenser.

 

 

Spark plug wire broken or short circuiting?

Replace defective spark plug wiring.

 

Wrong fuel type?

Flush fuel system, and replace with correct

 

type of fuel.

 

 

Difficult to start, fuel is available, spark is

 

 

Water or dust in fuel system?

Flush fuel system.

present and compression is normal.

 

 

Air cleaner dirty?

Clean or replace air cleaner.

 

 

 

 

 

Choke open?

Close choke.

 

 

 

 

Suction/exhaust valve stuck or protruded?

Reseat valves.

 

 

 

 

Piston ring and/or cylinder worn?

Replace piston rings and/or piston.

Difficult to start, fuel is available, spark is

 

 

Cylinder head and/or spark plug not tightened

Torque cylinder head bolts and spark plug.

present and compression is low.

properly?

 

 

Head gasket and/or spark plug gasket

Replace head and spark plug gaskets.

 

damaged?

 

 

 

No fuel in fuel tank?

Fill with correct type of fuel.

 

Fuel cock does not open properly?

Apply lubricant to loosen fuel cock lever,

 

replace if necessary.

No fuel present at carburetor.

 

Fuel filter/lines clogged?

Replace fuel filter.

 

 

Fuel tank cap breather hole clogged?

Clean or replace fuel tank cap.

 

Air in fuel line?

Bleed fuel line.

QP305SLT/QPT305SLT CENTRIFUGAL PUMP • operation and parts manual — rev. #1 (10/11/10) — page 25

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Multiquip QPT305SLT, QP305SLT manual Troubleshooting Engine
Page 24 Page 26

QPT305SLT, QP305SLT specifications

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