DR Power 9 HP Pro (March 2010 - June 2012) - Manual (Page 22)

22 DR ® STUMP GRINDER
Chapter 5: Troubleshooting
Most problems are easy to fix. Consult the Troubleshooting Table below for common problems and their solutions. If you
continue to experience problems, contact us at www.DRpower.com or call toll-free 1-800-DR-OWNER (376-9637) for support.
Troubleshooting Table
S YMPTOM P OSSIBLE C AUSE
Recoil will not pull out
or is difficult to pull.  There may be an oil compression lock in the cylinder. Take out the Spark Plug; hold a rag
over the Spark Plug hole and pull the Recoil Cord several times to blow out any oil in the
Cylinder. Wipe off the Spark Plug and reinstall it.
 Check the Engine oil level; the Engine may be seized.
 The Recoil may be broken or jammed. Visit our website at www.DRpower.com.
The Engine will not
start.
(Please refer to the
Engine Owner’s Manual
for Engine-specific
procedures.)
 Make sure the Operator Presence Lever is held down and that the Ignition Switch is in the
RUN position (Manual Start), or the Key is inserted into the Key switch and rotated to the
right (Electric Start).
 Check the oil and gas level.
 Make sure that the Fuel Shut-Off is in the ON position.
 Check that the Spark Plug Wire is attached.
 The Air Filter may be dirty; change it following the procedure in the Engine Owner’s Manual.
 The gas may be old; change it if necessary. Use a fuel stabilizer if you keep gas longer than
one month.
 Check the Throttle and Choke settings, adjustment and travel.
 The Spark Plug may be dirty or cracked; change it if necessary. If it’s oily, leave it out, hold a
rag over the Plug Hole and pull the Recoil Cord several times to blow out any oil in the
Cylinder, then wipe off the Plug and reinsert it.
 Check the wire connections—especially the ground connections to the Engine and the Starter
connections. Check to be sure that all of the connections are clean and tight.
 The Battery may not be charged. Check the voltage yourself or at a Service Station. If it is low,
charge it with a 12-volt, 1 to 2 amp trickle Charger. If you do not use your machine for at least
45 minutes at a time, the Battery may need to be periodically charged. See the “Battery Care
“section in Chapter 4.
 If your Engine still won’t start, visit our website at www.DRpower.com.
The Engine lacks power
or is not running
smoothly.
(Please refer to the
Engine Owner’s Manual
for engine-specific
procedures.)
 Make sure the Choke Lever is all the way off.
 The Air Filter may be dirty; change it following the procedure in the Engine Owner’s Manual.
 The Spark Plug may be dirty or cracked; change it if necessary.
 The gas may be old; change it if necessary. Use a fuel stabilizer if you keep gas longer than
one month.
 The Engine oil may be dirty. Change it if necessary.
 Check that the Cooling Fins are clean and free of debris. Clean as needed.
 If your Engine still lacks power, visit our website at www.DRpower.com.
Set the Wheel Brake, shut down the engine, remove the spark plug wire and wait 5 minutes before performing any maintenance
procedure or inspection on the Stump Grinder.