RedMax HC510DV manual Troubleshooting guide, Check Probable Causes Action,  32 

11. Troubleshooting guide

Case 1. Starting failure

CHECK PROBABLE CAUSES ACTION

fuel tank	➞	incorrect fuel
fuel filter	➞	fuel filter is clogged
carburetor adjustment screw ➞		out of normal range
sparking (no spark)	➞	spark plug is fouled/wet
	➞	plug gap is incorrect
spark plug	➞	disconnected

➞drain it and with correct fuel

➞clean

➞adjust to normal range

➞clean/dry

➞correct (GAP: 0.6~0.7mm)

➞retighten

Case 2. Engine starts but does not keep running/Hard re-starting.

CHECK PROBABLE CAUSES ACTION

fuel tank	➞ incorrect fuel or staled fuel
carburetor adjustment screw	➞ out of normal range
muffler,cylinder (exhaust port)	➞ carbon is built-up
air cleaner	➞ clogged with dust
cylinder fin, fan cover	➞ clogged with dust

➞drain it and with correct fuel

➞adjust to normal range

➞wipe away

➞wash

➞clean

When your unit seems to need further service, please consult with our RedMax service shop in your area.

32 