MAINTENANCE

INSPECT BLADE

WARNING: Before you inspect or remove the blade, disconnect the wire to the spark plug. If the blade hits an object, stop the engine. Check the unit for dam- age. The blade has sharp edges. When you hold the blade, use gloves or cloth material to protect your hands.

If you keep the blade sharp and inspect the blade for damage, the blade will cut better and be more safe to operate. Frequently check the blade for excessive wear, cracks, or other damage. Frequently check the nut that holds the blade. Keep the nut tight. If the blade hits an object, stop the engine. Disconnect the wire to the spark plug. See if the blade is bent or damaged. Check the blade adapter for damage. Before you operate the unit, replace damaged parts with original equipment parts. See the authorized service center in your area. Every three years, have an authorized service person inspect the blade or replace the old blade with an original equipment part.

HOW TO REMOVE AND INSTALL THE BLADE

1.Remove the mower housing. See the instructions on “How To Remove The Mower Housing”.

2.Use a piece of wood to keep the blade from rotating.

3.Remove the nut that holds the blade (Figure 12).

Hi–Lift

Edge Up

Mandrel

Blade Adapter

Blade

Belleville Washer

 

Washer

Nut

Figure 12

 

4.

Check the blade and the blade adapter according to the in-

 

structions for “Inspect Blade”. Replace a badly worn or dam-

 

aged blade with an original equipment blade. See an

 

authorized service center in your area.

5.

Clean the top and bottom of the mower housing. Remove all the

9.Tighten the nut that holds the blade to a torque of 35 foot pounds (47,5 N–m).

10.Install the mower housing. See “How To Install The Mower Housing”.

Blade Adapter

 

 

Blade

 

Washer

Belleville Washer

Nut

 

(Outside rim must be

Figure 13

against the blade.)

HOW TO SHARPEN THE BLADE

WARNING: Vibration can be caused if the blade is not correctly balanced or if the blade is damaged. A blade that is damaged with cracks can break and cause an accident.

Keep a sharp edge on the blade. A blade that is not sharp will cause the tips of the grass to become brown.

1.Sharpen the blade two times a year or every 25 hours.

2.Remove the blade according to the instructions in “How To Re- move And Install The Blade”.

3.Clean the blade with a brush, soap and water. Check the blade. Look for cracks, nicks, or other damage. Replace a badly worn or damaged blade with an original equipment blade. See an authorized service center in your area.

4.Sharpen the blade with a file (Figure 14). Make sure you keep the original bevel angle.

5.Make sure the blade is balanced. Use a screwdriver and hold the blade parallel to the ground (Figure 14). A blade that is balanced will stay parallel to the ground. If the blade is not bal- anced, the heavy end will rotate toward the ground. Sharpen the heavy end until the blade is balanced.

6.A new blade will cut better than a badly worn blade. Every three years, have an authorized service person inspect the blade or replace the old blade with an original equipment blade.

7.Assemble the blade according to the instructions “How To Re- move And Install The Blade”.

 

grass and debris.

6.

Mount the blade and blade adapter on the mandrel

 

(Figure 12).

7.

Mount the blade so that the hi–lift edges are up. If the blade

 

is upside down, the blade will not cut correctly and can cause

 

an accident.

8.

Fasten the blade with the original washers and nut. Make sure

 

the outside rim of the Belleville washer is against the blade

 

(Figure 13).

WARNING: Always keep the nut tight that holds the blade. A loose nut or blade can cause an accident.

F–030753L

22

Screwdriver

Blade is balanced

when parallel to the ground.

Ground

Blade

File

Figure 14

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Murray 425604x18A manual Inspect Blade, HOW to Remove and Install the Blade, HOW to Sharpen the Blade
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425604x18A specifications

The Murray 425604x18A is a powerful and versatile lawn mower engineered to meet the needs of both residential and commercial users. With its robust design and advanced features, this mower stands out in the market, ensuring efficient lawn maintenance for a variety of grass types and terrains.

One of the key features of the Murray 425604x18A is its reliable engine. Powered by a high-performance motor, it delivers consistent power for cutting through tough grass and uneven landscapes. The engine boasts a low-emission system, making it an environmentally friendly option while still maintaining optimal performance. This balance of power and eco-friendliness is particularly appealing to those who are conscious of their carbon footprint.

In terms of cutting capabilities, the Murray 425604x18A offers a cutting width of 18 inches, allowing for easy maneuverability in tighter spaces. It is equipped with multiple cutting height adjustments, enabling users to achieve their desired lawn finish, whether they prefer a closely cropped look or a longer grass finish. The precision cutting technology ensures that each pass leaves a uniform and clean cut, promoting a healthier lawn.

Comfort and ease of use are also highlights of this mower. The ergonomic design includes an adjustable handle, ensuring that operators of all heights can find a comfortable grip. The lightweight construction enhances maneuverability, reducing fatigue during prolonged use. The mower’s large wheels provide excellent traction, making it suitable for various terrains, from hilly landscapes to flat gardens.

Another notable characteristic is the mower's ease of maintenance. The durable blade system is designed for simple sharpening and replacement, allowing users to keep their mower in top condition with minimal hassle. Additionally, the easy-to-access engine compartment simplifies routine checks and servicing.

The Murray 425604x18A is also designed with safety in mind. Features such as a safety switch ensure that the mower cannot be started accidentally, protecting users and bystanders alike.

Overall, the Murray 425604x18A combines power, efficiency, and ease of use, making it an outstanding choice for anyone looking to maintain their lawn effectively. With its thoughtful design and reliable performance, this mower stands ready to tackle the challenges of lawn care with confidence.
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