Ariens 936027 (Sierra 1640H Twin) Specifications download pdf (Page 10)

Operation (Continued)

Throttle/Choke

• Throttle/Choke lever controls engine speed (to

increase, push up-to decrease, pull down) and

activates choke (push lever up and to right past

offset). On the 16 HP B & S twin model, the

throttle and choke are separate controls.

• To start a cold engine move lever to “CHOKE”

position and after engine has started, gradually

pull lever down to open choke and allow engine

to warm up at 1/2 throttle setting. (It should not

be necessary to choke a warm engine).

CAUTION: DO NOT change engine

governor setting or over speed the

engine.

• Attachments should be operated at full throttle

unless otherwise specified in attachment Owner’s

Manual. Select desired travel speeds with Speed

Selector.

Ignition

• With operator on seat, tractor will not start unless

Speed Selector is in neutral (N), (gear drive

only) Implement Power is disengaged,

(Off) Clutch/Brake Pedal is

depressed or parking brake is set.

Refer to indicator lights figure 3.

• To start engine, place ignition key in ignition

switch and turn it clockwise to (Start) position.

When engine starts, release ignition key. Turn

ignition key counterclockwise to (Off) to stop

engine.

CAUTION: Turn ignition key (OFF) and

remove it before attempting any

maintenance, adjustments, or leaving

tractor unattended.

• If engine fails to start on first attempt, turn ignition

key (OFF), wait a few seconds and try again.

Best starter life is obtained by using short starting

cycles.

IMPORTANT: DO NOT operate starter motor more

than 15 seconds per minute, as overheating and

damage can occur.

After engine has started, allow it to warm up before

applying load.

IMPORTANT: Run engine at 1/2 of (FAST) engine

speed for at least five minutes in below freezing

temperatures to prevent internal damage to engine

and transaxle.

Clutch/Brake Pedal

CAUTION: Test brake regularly. To test,

roll tractor by hand on a level surface

while depressing clutch/brake pedal. If

brake does not hold tractor with 3/4” to

1” of pedal travel remaining, adjust disc

brake according to instruction in

Adjustments Section. Be sure

transmission disconnect is disengaged

when testing brakes on hydro.

• When Clutch/Brake Pedal is fully depressed, disc

brake on transaxle stops tractor.

• It is recommended that clutch/brake pedal be

fully depressed when shifting to any desired

gears on gear drive transaxles. Release

clutch/brake pedal slowly for smooth acceleration

and remove foot from pedal on gear drive

transaxles. Do not leave foot on pedal during

operation as belt slippage may occur.

CAUTION: Fully depressing

clutch/brake pedal unlatches parking

brake.

NOTE: When starting engine, depress clutch/brake

pedal. (In extremely cold weather, allow engine to

warm up, then release clutch/brake pedal and allow

transaxle to warm up before applying load.)

• Depressing pedal de-clutches drive belt and then

applies brake. To stop tractor in emergency

situations, fully depress clutch/brake pedal.

Always position speed control in slow ground

speed prior to releasing clutch/brake pedal on

gear drive models.

FAST ENGINE

SPEED

SLOW CHOKE

RUNOFF CRANK

BRAKECLUTCH

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Ariens 936027 (Sierra 1640H Twin) Specifications Page 10

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