DR Power 9 HP Pro (March 2010 - June 2012) - Manual (Page 23)

CONTACT US AT www.DRpower.com 23
Troubleshooting Table (Continued)
S YMPTOM P OSSIBLE C AUSE
Engine smokes.  Check the oil level and adjust as needed.
 Clean the Engine cooling fins and the carburetor housing if they are dirty.
 The Air Filter may be dirty; change it following the procedure in the Engine Owner’s Manual.
 You may be using the wrong oil. Refer to your Engine Owner’s Manual for detailed
information.
 If the Engine still smokes, visit our website at www.DRpower.com.
The Engine runs well but
the Cutting Head won’t
move.  The Throttle should be fully pressed to engage Clutch.
 The Cutter Head Drive Belt is off the pulleys or broken. Reinstall or change Belt (refer to
“Chapter 4: Maintaining the DR Stump Grinder”).
 Confirm there is nothing wedged/ wrapped around cutter head, or Pulleys.
 Confirm the throttle is moving on the engine.
 Confirm that Belt has not stretched to a point that it is slipping off the Pulleys.
 Clutch is not working. Change Clutch (refer to “Chapter 4: Maintaining the DR Stump
Grinder”).
The Engine does not
fully return to low idle
when the throttle is
released.  Throttle linkage is sticking. Adjust throttle linkage (refer to “Chapter 4: Maintaining the DR
Stump Grinder”)
The Cutting Head is
rotating but the cutting
action is extremely slow
and the stump is
showing signs of
excessive heat.  The teeth are dull or damaged. Replace Teeth (refer to “Chapter 4: Maintaining the DR Stump
Grinder”).
Belt falls off Pulleys
frequently.  Check Pulleys and Belt for damage.
 Check tightness of Idler Arm Pivot Bolt.
Left-side Wheel turns
forward when Brake
Lever is locked or
machine is difficult to
push when Brake Lever
is released.  Brake Cable needs adjusting. Adjust Cable as needed (refer to “Chapter 4: Maintaining the DR
Stump Grinder”).
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.