Dixon ZTR 5424 - Manual (Page 21)

OPERATION INSTRUCTIONS
STARTING INSTRUCTIONS: Engine has been operated.
1. Move throttle control lever 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 lever to wide open or maximum setting for actual
operation of the mower deck.
4. Engine must be operated at wide open or maximum setting to insure
adequate lubrication, cooling and cut quality of the mower deck.
DO NOT operate the engine in an enclosed area
due to the harmful exhaust gas produced.
NOTE: 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.
Page 19