Troubleshooting Guide - Shindaiwa T2500 Owner's/Operator's Manual

Troubleshooting Guide

ENGINE DOES NOT START
What To Check Possible Cause
Faulty recoil starter.
Does the engine crank?
NO
Fluid in the crankcase.
Internal damage.
YES
Loose spark plug.
Good compression?
NO
Excess wear on cylinder, piston, rings.
Valves not seating.
YES
Fuel incorrect, stale or contaminated;
Does the tank contain NO
mixture incorrect.
fresh fuel of the proper
grade?
YES
Check for clogged fuel filter and/or vent.
Is fuel visible and moving
NO
in the return line when
Priming pump not functioning properly.
priming?
YES
The ignition switch is in "O" (OFF)
Is there spark at the spark
NO
position.
plug wire terminal?
Shorted ignition ground.
Faulty ignition unit.
YES
If the plug is wet, excess fuel may be in
Check the spark plug.
the cylinder.
The plug is fouled or improperly gapped.
The plug is damaged internally or of the
wrong size.
LOW POWER OUTPUT
What To Check Possible Cause
Operator is overworking the unit.
Is the engine overheating?
Carburetor mixture is too lean.
Improper fuel ratio.
Fan, fan cover, cylinder fins dirty
or damaged.
Carbon deposits on the piston or in
the muffler.
Clogged air cleaner element.
Engine is rough at all
speeds. May also have
Loose or damaged spark plug.
black smoke and/or
unburned fuel at the
Air leakage or clogged fuel line.
exhaust.
Water in the fuel.
Piston seizure.
Faulty carburetor and/or diaphragm.
Valve clearance set incorrectly.
Overheating condition.
Engine is knocking.
Improper fuel.
Carbon deposits in the combustion
chamber.
Valve clearance set incorrectly.
Remedy
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
Tighten and re-test.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
Refill with fresh, clean unleaded gasoline with
a pump octane of 87 or higher mixed with
a 2-cycle air cooled mixing oil that meets or
exceeds ISO-L-EGD and/or JASO FC classified
oils at 50:1 gasoline/oil ratio.
Replace fuel filter or vent as required; restart.
Consult with an authorized servicing dealer.
Move switch to "I" (ON) position and restart.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
Crank the engine with the plug removed,
reinstall the plug, and restart.
Clean and regap the plug to 0.024 - 0.028
inch (0.6 - 0.7 mm). Restart.
Replace the plug with an NGK CMR6H or
equivalent resistor type spark plug of the
correct heat range. Set spark plug electrode
gap to 0.024-0.028 inch (0.6-0.7 mm).
Remedy
Shorten trimmer line. Cut at a slower rate.
Consult with an authorized servicing dealer.
Refill with fresh, clean unleaded gasoline with
a pump octane of 87 or higher mixed with
a 2-cycle air cooled mixing oil that meets or
exceeds ISO-L-EGD and/or JASO FC classified
oils at 50:1 gasoline/oil ratio.
Clean, repair or replace as necessary.
Consult with an authorized servicing dealer.
Service the air cleaner element.
Tighten or replace.
Repair or replace filter and/or fuel line.
Replace the fuel. See page 9.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
See above.
Check fuel octane rating; check for presence of
alcohol in the fuel (pg. 9). Refuel as necessary.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
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