Replacing headlight bulb, Replacing fuse, Service miscellaneous – John Deere z425 User Manual

Page 39: Using proper fuel

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Service Miscellaneous - 38

SERVICE MISCELLANEOUS

4. Connect the other end (F) of negative (–) booster cable to a metal part
of the disabled machine engine block away from battery.

5. Start the engine of the disabled machine and run machine for several
minutes.

6. Carefully disconnect the booster cables in the exact reverse order:
negative cable first and then the positive cable.

Replacing Headlight Bulb (If Equipped)

1. Park machine safely. (See Parking Safely in the SAFETY section.)

MX37472

2. Turn bulb socket (A) 1/4 turn counterclockwise to remove.

3. Replace defective bulb with a new bulb.

4. Insert bulb socket into housing, push in and turn 1/4 turn clockwise to
install.

Replacing Fuse

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Raise operator’s seat.

MX37906

Picture Note: Z225 shown.

3. Pull blown fuse out of socket.

• Fuse identification:

4. Check metal strip in fuse window and discard fuse(s) if strip is broken.

5. Push new, correct amp, fuse into correct socket.

6. Lower operator’s seat.

Service Miscellaneous

Using Proper Fuel

Use regular grade unleaded fuel with an octane rating of 87 octane or
higher. Fuel blends containing up to 10% ethanol or up to 15% MTBE
reformulated fuel are acceptable. Do not use fuel or additives containing
methanol as engine damage can occur.

Always use fresh, clean fuel that is purchased in a quantity that can be
used within approximately 30 days, or add fuel stabilizer.

Fuel is blended to give best seasonal performance. To avoid engine
performance problems such as hard starting or vapor lock, use in-season
fuel. Use fuel during warm weather that was purchased during that
season, and use fuel during cold weather that was purchased during that
season.

Fuel can become stale in machines with engines that are used seasonally
or infrequently during a season. Stale fuel can produce varnish and plug
carburetor components which can affect engine performance.

Keep fuel storage container tightly covered and in a cool area out of direct
sunlight. Fuel can break down and degrade if not sealed properly or
exposed to sun and heat.

Condensation may collect in the fuel tank because of a variety of operating
or environmental conditions and, over time, may affect your machine’s
operation. Fill fuel tank at the end of daily use and store fuel in plastic
containers to reduce condensation.

For best year-round performance and fuel-handling, add stabilizer to fuel

IMPORTANT: Avoid damage! Electric charge from booster battery
can damage machine components. Do not install negative
booster cable to machine frame. Install only to the engine block.

Install negative booster cable away from moving parts in the
engine compartment, such as belts and fan blades.

A

Position

Circuit

Fuse Size

A

Main Circuit

20 amp

B

Starter Circuit

20 amp

C

Key Switch/Fuel Solenoid

7.5 amp

D

Headlights (Optional)

7.5 amp

A

C

D

B

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