John Deere Products & Services Lawn Mower D100 User Manual

mower/engine (C) service interval has been reached. When service is
required, the service “SVC” arrows (D) will periodically flash for two
hours. Follow the service timetable on the maintenance schedule
located under the seat. For specific service procedures, see the
Service section of this manual.

• Hourmeter cannot be reset.

• The hourmeter display will always be on.

• The decimal point will flash while the hourmeter is accumulating time.

Using Key Switch and Headlights

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A — STOP Position
B — Headlights On Position
C — Run Position
D — Start Position

Engine Off

NOTE: Headlights will drain the battery rapidly if key switch is left in

headlights on position (B) with the engine off.

• To turn headlights on, turn key switch to headlights on position (B).

• To turn headlights off, turn key switch to STOP position (A).

Engine On

• To turn headlights on, start engine, then turn key switch from run

position (C) to headlights on position (B).

• To turn headlights off, turn key switch from headlights on position (B)

to run position (C).

Starting the Engine

IMPORTANT: Hydrostatic transmission might be damaged if the

bypass rod is not pushed back to operating position before
attempting to start the engine. Do not start or operate the
machine with the bypass rod in the pulled-out position.

Make sure bypass rod is pushed in.

CAUTION: Engine exhaust fumes contain carbon monoxide
and can cause serious illness or death.

Do not run an engine in an enclosed area, such as a garage,
even with doors or windows opened.

Move the machine to an outside area before running the
engine.

Sit in seat.

Make sure mower is disengaged. (See Engaging and Disengaging
Mower in the OPERATING section.)

Lock the park brake.

For automatic models, put transmission shifter into center slot.

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Check starting conditions:
•

If engine is cold: Move throttle/choke lever (A) up to the choke

position.

• If engine is warm: Move throttle/choke lever (A) to the half-speed

position.

IMPORTANT: Starter may be damaged if starter is operated for more

than 20 seconds at a time:

Wait two minutes before trying again if engine does not start.

Turn key to start position for no more than five seconds.

Release key to run position when engine starts, and gradually move
choke lever down to the off position.
• If engine does not start, wait 10 seconds.

• Turn key to start position again for no longer than 5 seconds.

• Repeat procedure if necessary.

IMPORTANT: Unnecessary engine idling may cause engine damage.

Excessive idling can cause engine overheating, carbon
build-up, and poor performance.

Let engine run at high idle for a couple of minutes to warm-up before
operating machine.

Idling the Engine

IMPORTANT: Unnecessary engine idling may cause engine or

transmission damage. Excessive idling can cause engine
overheating, carbon build-up, and poor performance.

Idling or low throttle operation while mowing, climbing hills,
or towing could result in transmission overheating. always
operate at full throttle once the engine is warm.

Do not operate machine with hood open. Hood must be
closed for proper engine cooling and exhaust.

• Engine is air cooled and needs a large volume of air to keep cool.

Keep air intake screen on top of engine clean.

• Keep hood closed when engine is idling.

Stopping the Engine

IMPORTANT: Do not stop the engine by moving choke control to the

choke position. Backfire, fire or engine damage can occur.
Follow recommended procedure for stopping engine.

Let engine run at high throttle without load for a few seconds.

Operating