Troubleshooting - Black Max BM5020 Operator's Manual

Problem
Engine starts, runs, Carburetor requires
and accelerates but adjustment to idle speed.
will not idle.
Carburetor requires
Chain turns at idle. adjustment to idle speed.
Air leak in the intake
system.
Bar and chain running Chain oil tank empty.
hot and smoking.
Chain tension is too tight.
Oiler is not
functioning.
Engine starts and Chain brake is
runs, but chain is not engaged.
rotating.
Chain tension is too tight.
Guide bar and
chain assembled incor-
rectly.
Guide bar and/or chain
are damaged.
Drive sprocket teeth
damaged
If problem persists after trying the above solutions, contact customer service or a qualified service
center for assistance.
NOTICE:
As the equipment owner, you are responsible for the performance of the required maintenance listed
in the Maintenance section. It is recommended that you retain all receipts covering maintenance on
your equipment. Neglecting or failing to perform the required maintenance may increase emissions,
decrease fuel efficiency, degrade performance, cause irreversible engine damage and/or void your
warranty.
This product has a Three-year Limited Warranty for personal, family,
or household use (30 days for business or commercial use).
For warranty details, visit www.blackmaxtools.com

TROUBLESHOOTING

Possible Cause
or call (toll free) 1-800-726-5760.
Page 38 — English
Turn idle speed screw "T" clockwise to increase idle speed.
Refer to Adjusting the Carburetor in the Maintenance section of
this manual.
Turn idle speed screw "T" counterclockwise to decrease speed.
Refer to Adjusting the Carburetor in the Maintenance section of
this manual.
Contact an authorized service center for a rebuild kit.
Oil tank should be filled every time fuel tank is filled.
Tension chain per instructions in Adjusting the Chain Tension in
the Maintenance section of this manual.
Run at half throttle 30 to 45 seconds. Stop saw and check for lubri-
cant dripping from safety tip and guide bar. If lubricant is present,
the chain may be dull or bar may be damaged. If no lubricant is on
the safety tip, contact an authorized service center.
Release chain brake. Refer to Operating the Chain Brake in the
Operation section of this manual.
Tension chain per instructions in Adjusting the Chain Tension in
the Maintenance section of this manual.
Refer to Replacing the Guide Bar and Chain in the Maintenance
section of this manual.
Inspect guide bar and chain for damage.
Contact an authorized service center for drive sprocket replacement.
Solution