DR Power Tow-Behind 13.74 Pro-XL (August 2010 - August 2014) - Manual (Page 32)

32 DR ® LEAF and LAWN VACUUM
Troubleshooting Table (Continued)
S YMPTOM P OSSIBLE C AUSE
The Engine lacks power
or is not running
smoothly.
(Please refer to the
Engine Owner’s Manual
for engine-specific
procedures.)
 Check the Throttle travel. See your engine owners manual.
 The Choke should be pushed all the way to the left (RUN. See your engine owners manual.
 Check to see if the Air Filter is clean. If it’s dirty, change it following the procedure in the Engine
Owner’s Manual.
 The Spark Plug should be clean. If the Spark Plug is dirty or cracked, change it. 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.
 You should be using fresh, clean gas. If the gas is old, change it. Use a fuel stabilizer if you keep
gas longer than one month.
 Check and make sure the Engine has the right amount of clean oil. If it’s dirty, change it
following the procedure in your engine owners manual.

If your Engine still lacks power, visit us at www.DRpower.com or call 1-800-DR-OWNER (376-
9637) for assistance.
Engine smokes.  Check the oil level and adjust as needed.
 You may be operating the machine on too great an incline. See Slopes on page 19.
 Check the Air Filter and clean or replace if needed.
 You may be using the wrong oil—too light for the temperature. Refer to your Engine Owner’s
Manual for detailed information.
 Clean the Engine cooling fins and the carburetor housing if they are dirty.
 If the Engine still smokes, visit us at www.DRpower.com or call 1-800-DR-OWNER (376-9637) for
assistance.
Wheels tracking left or
right while being towed.  Check the tire pressure. Refer to the Tire manufacturers recommended pressure on the side of
the Tire and adjust pressure as needed.
Vibrations higher than
normal.  Check for Chipper Blade damage. See page 25.
NOTE: You must not sharpen the Chipper Blade; you must replace it if damaged.
Lawn Deck is not
vacuuming well.  Be sure the Lawn Deck Blades are engaged and running at full throttle.
 Be sure the Deck is set at the proper mowing height.
 Be sure the Leaf and Lawn Vacuum Engine is running at full throttle.
 Use 1st or 2nd gear on your Lawn Tractor for best results.
 Turn off the Lawn Tractor Engine and Vacuum Engine, and check the Hose Adapter for clogs.
 Look for clogs along the Hose. Shake the Hose to loosen and free any clog.
 Turn off the Lawn Tractor Engine and Leaf and Lawn Vacuum Engine, and disconnect the Leaf
and Lawn Vacuum Engine Spark Plug Wire. Check for clogs in the Impeller Outlet Duct and Inlet
Hose.
 If your Lawn Deck still is not vacuuming properly, visit us at www.DRpower.com or call 1-800-
DR-OWNER (376-9637) for assistance.
Before performing any maintenance, repairs or inspection, you must first shut off the mower and leaf and lawn vacuum engines,
wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.