Troubleshooting - Black Max BM4CSSAC Operator's Manual

PROBLEM
Engine will not start
Engine does not reach full speed
and emits excessive smoke
Engine starts, runs, and
accelerates but will not idle
Engine emits too much smoke
Engine rope cannot be pulled
Line will not advance
Grass wraps around driveshaft
housing and string head
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 sec-
tion. 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.

TROUBLESHOOTING

POSSIBLE CAUSE
No spark.
No fuel.
Engine is flooded.
Air filter is dirty.
Spark arrestor screen is dirty.
Spark plug fouled.
Idle speed screw on carburetor
needs adjustment.
Too much lubricant in crankcase.
Lubricant has entered the
combustion chamber.
Line is welded to itself.
Not enough line on spool.
Line is worn too short.
Line is tangled on spool.
Engine speed is too slow.
Cutting tall grass at ground level.
Operating trimmer at part throttle.
Page 13 — English
SOLUTION
Clean or replace spark plug. Reset spark plug gap. Refer
to Spark Plug Replacement earlier in this manual.
Push primer bulb until bulb is full of fuel. If bulb does not
fill, primary fuel delivery system is blocked. Contact a
qualified service center. If primer bulb fills, engine may
be flooded, proceed to next item.
Set the choke lever to the RUN position. Squeeze the
trigger and pull the rope repeatedly until the engine starts
and runs.
NOTE: Depending on the severity of the flooding, this
may require numerous pulls of the starter grip and rope.
Clean air filter. Refer to Cleaning the Air Filter earlier
in this manual.
Contact a qualified service center.
Clean or replace spark plug. Reset spark plug gap. Refer
to Spark Plug Replacement earlier in this manual.
Turn idle speed screw clockwise to increase idle speed.
See Figure 14.
Drain lubricant and refill with correct amount of 20W50
engine lubricant. See Adding/Checking Engine
Lubricant in the Operation section of this manual.
This is usually caused by storing the unit for an extended
time with the engine in an upside-down position. Remove
and clean the spark plug. Drain the lubricant out of the
spark plug hole, then reinstall the spark plug.
Check engine lubricant and add if necessary prior to
starting. Refer to Adding/Checking Engine Lubricant
earlier in this manual.
Replace line. Refer to the applicable line replacement
section in this manual.
Install more line. Refer to the applicable line replacement
section in this manual.
Pull lines while alternately pressing down on and releasing
the bump knob.
Remove line from spool and rewind. Refer to the
applicable line replacement section in this manual.
Advance line at full throttle.
Cut tall grass from the top down to prevent wrapping.
Operate trimmer at full throttle.