Dixon ZTR 5000 Series Operator's Manual page 20

OPERATION INSTRUCTIONS
STARTING INSTRUCTIONS:
1. Move throttle control to 1/4 to 1/2 setting.
2. Insert ignition key and turn to "Start" position. When engine starts,
release ignition key. Key will return to "Run" position.
3. Move throttle control to FAST position for actual operation of the mower
deck.
NOTE:
4. Engine must be operated with throttle control in the FAST position, or
maximum setting to insure adequate lubrication and cooling of the engine,
and cut quality of the mower deck.
A CAUTION
NOTE:
Page 18
Engine has been operated.
Model ZTR 5022 may require partial choke setting to start even
if the engine has been operated for a period of time.
DO NOT operate the engine in an enclosed area due to the
harmful exhaust gas produced.
On initial operation, set throttle at slow speed.
Engine cannot be restarted when blade is engaged.
Safety switches stop engine when operator leaves seat while
mower blade is engaged.
Always turn engine off when leaving mower.