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Troubleshooting table (continued) – DR Power 9 HP Pro (March 2010 - June 2012) User Manual

Page 23

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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.