Troubleshooting (Engine) - MULTIQUIP QP205SB Operation Manual

Symptom
Difficult to start
Fuel is available but spark plug will not ignite
(power available at high-tension cable).
Fuel is available but spark plug will not ignite
(power NOT available at high-tension cable).
Fuel is available and spark plug ignites
(compression normal).
Fuel is available and spark plug ignites
(compression low).
Operation not satisfactory
Not enough power available
(compression normal, no misfiring).
Not enough power available
(compression normal, misfiring).
Engine overheats.
Rotational speed fluctuates.
Recoil starter not working properly.
QP205SB CENTRIFUGAL PUMP • OPERATION MANUAL — REV. #0 (04/06/23)— PAGE 27
TROUBLESHOOTING ( ENGINE )
Table 8. Engine Troubleshooting
Possible Problem
Bridged spark plug gap?
Carbon deposit at ignition?
Short circuit due to defective insulators?
Improper spark gap?
Short circuit at stop switch?
Defective ignition coil?
Muffler clogged with carbon deposits?
Mixed fuel quality inadequate?
Fuel in use inadequate (water, dust)?
Air cleaner clogged?
Defective cylinder head gasket?
Worn cylinder?
Loose spark plug?
Clogged air cleaner?
Air in fuel line?
Improper fuel level in carburetor float chamber?
Carbon deposits in cylinder?
Defective ignition coil?
Ignition plug often shorts?
Fuel in use inadequate (water, dust)?
Excessive carbon deposition in combustion
chamber?
Exhaust or muffler clogged with carbon?
Incorrect spark plug heat value?
Improper governor adjustment?
Defective governor spring?
Erratic fuel flow?
Air taken in through suction line?
Dust in rotating part?
Spring failure?
Solution
Check ignition system.
Clean or replace ignition.
Replace insulators.
Set spark plug gap to the correct
distance.
Check stop switch circuit. Replace stop
switch if defective.
Replace ignition coil.
Clean or replace muffler.
Check fuel to oil mixture.
Flush fuel system and replace with
fresh fuel.
Clean or replace air cleaner.
Tighten cylinder head bolts or replace
head gasket.
Replace cylinder.
Tighten spark plug.
Clean or replace air cleaner.
Bleed (remove air) from fuel line.
Adjust carburetor float.
Clean or replace cylinder.
Flush fuel system and replace with
fresh fuel.
Replace ignition wires, clean ignition.
Flush fuel system and replace with
fresh fuel.
Clean or replace crankcase.
Clean or replace muffler.
Replace spark plug with correct spark
plug type.
Adjust governor to correct lever.
Clean or replace ignition.
Check fuel line.
Check suction line.
Clean recoil starter assembly.
Replace spiral spring.