Ignition System (Trouble-Shooting) - Makita DCS3500 Repair Manual

07 IGNITION SYSTEM (TROUBLE-SHOOTING)

Is the spark plug dry and properly installed?
Remove spark plug. Is the spark plug damaged? Is it the wrong kind of spark plug?
Is there carbon on the electrodes?
Is the spark gap correct? (should be 0.5 mm)
Is the spark plug oily or does it have carbon deposits on it?
Install ignition testing lamp.
Alternatively, insert universal wrench between cylinder and hood. The wrench must
have metallic contact with the cylinder. Caution: Do not insert the wrench into the spark
plug hole or hold with hand.
Using insulated pliers, hold the unscrewed spark plug against the wrench.
Caution: Do not hold the spark plug directly against the hole. Detonation hazard!
Pull the starting cable smartly. Is there an ignition spark?
Is there damage to the insulation of the high-voltage cable or the ignition cable,
or to the wires themselves?
Is the gap between the flywheel and the ignition module outside of the 0.25-0.3 mm range?
Is the gap uneven? Has the flywheel worn against the ignition module?
Remove flywheel and check. Is the flywheel damaged?
Is the positioning key damaged?
Continue with troubleshooting in fuel system (tank, fuel hose, carburetor).
Reparaturanleitung PS-4600 / PS-5000
Repair manual DCS3500 / DCS3501 / DCS4300 / DCS4301 / EA3500F / EA3501F / EA4300F / EA4301F / MEA3500L / MEA3500M / MEA4300G / MEA4300L
yes
no
yes
no
yes
no
no
no
no
Dry spark plug cap and fasten firmly to spark plug.
If needed, replace the cap or cap spring.
Replace spark plug. Use ONLY a spark plug approved by DOLMAR.
yes
See operating manual! Otherwise the ignition module might be damaged.
Eliminate the causes for carbon deposits on electrodes (bad two-stroke oil, wrong mix,
defective air filter, check carburetor adjustment).
Use DOLMAR high-performance two-stroke oil.
Wash spark plug in acetone. Do not sandblast!
Eliminate cause: wrong carburetor setting, too much oil in fuel,
no
Replace spark plug and check ignition module for corrosion, if necessary replace.
Replace high-voltage cable and/or ignition cable. Has the defect been remedied?
Check radial play of drive shaft, and repair if needed.
Replace ignition module if traces of overheating become visible.
Adjust gap between flywheel and ignition module correctly.
Replace flywheel or key. Before installation wipe cone seat at drive shaft
and flywheel with acetone or alcohol to remove any grease.
Tighten fastening nut to the correct torque! Has the defect been remedied?
Replace ignition module. Has the defect been remedied?
Adjust spark gap.
If necessary, replace spark plug.
frequent short operations.
Has the defect been remedied?
no
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