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38 TOW-BEHIND DR
®
FIELD and BRUSH MOWER
WHEN PERFORMING ANY ADJUSTMENT OR MAINTENANCE, YOU MUST FIRST SHUT OFF THE ENGINE,
WAIT FIVE (5) MINUTES TO ALLOW PARTS TO COOL AND DISCONNECT THE SPARK PLUG WIRE(S),
KEEPING IT AWAY FROM THE SPARK PLUG(S).
SYMPTOM POSSIBLE CAUSE
The Engine lacks
power or is not
running smoothly.
(Please refer to the
Engine Owner’s
Manual for Engine-
specific procedures.)
⇒ Check the Throttle Lever travel and adjustment. Make sure the Throttle Lever is in
the Run position.
⇒ The Air Filter may be dirty, change it following the procedure in the Engine
Owner’s Manual.
⇒ The Spark Plug(s) may be dirty or cracked, change it.
⇒ If the Spark Plug(s) is oily, leave it out, hold a rag over the Plug hole(s) and crank
the Engine over a couple of times using the Electric Starter to blow out any oil in
the Cylinder(s), then wipe off the Plug(s) and reinsert it.
⇒ The gas must be fresh and clean. If the gas is old, change it. Use a fuel stabilizer
if you keep gas longer than one month.
⇒ The Engine may not have the right amount of clean oil. If it is dirty, change it
following the procedure on page 28.
⇒ If your Engine still lacks power, 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 and
Uneven Terrain” on page 26.
⇒ Check the Air Filter(s) 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 Cooling Fins and the Carburetor housing if they are dirty.
⇒ If the Engine still smokes, call 1-800-DR-OWNER (376-9637) for assistance.
The Belt frays or
rolls over the Pulley.
⇒ There may be a nick in a Pulley groove. Check the Belt for wear and hard spots.
File off any nicks on the Pulley.
⇒ The Belt may be stretched; replace it. See page 29.