STARTING AND STOPPING INSTRUCTIONS

OPERATING INSTRUCTIONS

3.Fully press and release the primer bulb 10 times, slowly. Some amount of fuel should be visible in the primer bulb and fuel lines (Fig. 11). If you can’t see fuel in the bulb, press and release the bulb as many times as it takes before you can see fuel in it.

4.With the unit in the starting position, do not squeeze the throttle control (Fig. 12). Pull the starter rope out a short distance, until you feel some resistance. This is usually around 2-4 inches. Then pull the rope smoothly and briskly. Repeat this 5 times. The engine should start.

IF COLD... For cold weather conditions (below 40°F), flip the Cold Weather Start Lever back up to the run/open position after the unit has started and before squeezing the throttle control.

5.Squeeze the throttle control to warm up the engine for 15 to 30 seconds. In cold weather, let the engine warm up for 30 to 60 seconds.

IF... The engine does not start, go back to step 3.

IF... The engine stops while you are squeezing the throttle, go back to step 4.

STOPPING INSTRUCTIONS

1.Release your hand from the throttle control. Allow the engine to cool down by idling.

2.Put the On/Off Stop Control in the OFF (O) position.

Stop/ Off (O)

Start/ On (I)

Throttle

Control

 

Fig. 10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cold Weather

 

 

 

Primer Bulb

Start Lever

 

 

 

 

 

 

 

 

 

Run/ Open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Close/ Start

Fig. 11

Starter

Rope

Throttle

Control

Fig. 12

•The unit is at waist level

•The cutting attachment is parallel to the ground and easily contacts the grass without the need to bend over Some line breakage will occur from:

•Entanglement with foreign matter

•Normal line fatigue

•Attempting to cut thick, stalky weeds

•Forcing the line into objects such as walls or fence posts

TIPS FOR BEST TRIMMING RESULTS

•For best trimming results, operate unit at full throttle.

•Keep the cutting attachment parallel to the ground.

•Do not force the cutting attachment. Allow the tip of the line to do the cutting, especially along walls. Cutting with more than the tip will reduce cutting

efficiency and may overload the engine.

•Cut grass over 8 inches (200 mm) by working from top to bottom in small increments to avoid premature line wear or engine drag.

•Slowly move the trimmer into and out of the cutting area at the desired height. Move either in a forward-backward or side-to-side motion. Cutting shorter lengths produces the best results.

•Trim only when grass and weeds are dry.

• The life of your cutting line is dependent upon:

•Proper adherence of explained trimming techniques

•What vegetation is cut

• Where vegetation is cut

For example, the line will wear faster when trimming against a foundation wall as opposed to trimming around a tree.

DECORATIVE TRIMMING

 

Decorative trimming is accomplished by removing all vegetation

 

around trees, posts, fences and more.

Fig. 17

 

Rotate the whole unit so that the cutting attachment is at a 30° angle to the ground (Fig. 17).

MAINTENANCE AND REPAIR INSTRUCTIONS

OPERATING INSTRUCTIONS

OPERATING THE RAPID-LINK™ SYSTEM

The Rapid-Link™ system enables the use of these optional Add-Ons:

Mach IV® Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AF720 Hedge Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AH720 Brushcutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BC720* Blower/ Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BT720 Blower Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BV720 Cultivator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GC720 Edger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LE720 Pole Saw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PS720 Straight Shaft Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SS725 Snow Thrower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST720 Turbo Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB720 *Do NOT use this attachment with an electric powered unit.

Rapid-Link™Coupler

Release

REMOVING THE CUTTING ATTACHMENT OR ADD-ON

Button

WARNING: Before you begin using any attachment, read and understand the manual that came with the attachment. Follow all safety information contained within.

MAINTENANCE SCHEDULE

Perform these required maintenance procedures at the frequency stated in the table. These procedures should also be a part of any seasonal tune-up.

NOTE: Some maintenance procedures may require special tools or skills. If you are unsure about these procedures take your unit to any non-road engine repair establishment, individual or authorized service dealer.

WARNING: To prevent serious injury, never perform maintenance or repairs with unit running. Always service and repair a cool unit. Disconnect the spark plug wire to ensure that the unit cannot start.

NOTE: Maintenance, replacement, or repair of the emission control devices and system may be performed by any non-road engine repair establishment, individual or authorized service dealer.

FREQUENCY

MAINTENANCE REQUIRED

SEE

Before starting engine

Fill fuel tank with fresh fuel

p. 4

 

Check oil

p. 6

 

 

 

Every 10 hours

Clean and re-oil air filter

p. 6

 

 

 

1st change at 10 hours

Change oil

p. 6

2nd change at 25 hours

Change oil

p. 6

Every 25 hours after

Clean spark arrestor

p. 7

 

 

 

10 hours on new engine

Check rocker arm to valve clearance and adjust

p. 6

Every 25 hours

Check rocker arm to valve clearance and adjust

p. 6

WARNING: To avoid serious personal injury and damage to the unit, shut the unit off before removing or installing add-ons.

1.Turn the knob counterclockwise to loosen (Fig. 13).

2.Press and hold the release button (Fig. 13).

3.While firmly holding the upper shaft housing, pull the cutting attachment or add-on straight out of the Rapid-Link™ coupler (Fig. 14).

Installing the Cutting Attachment or Add-On

NOTE: Place the unit on the ground or on a work bench to make add-on installation or removal easier.

1.Turn knob counterclockwise to loosen (Fig. 13).

2.While firmly holding the add-on, push it straight into the Rapid-Link™ coupler (Fig. 14).

Guide Recess

Fig. 13

Primary Hole

Upper Shaft

 

Lower Shaft

Housing

 

Housing

 

 

 

 

Fig. 14

 

 

 

 

 

 

Every 25 hours

Check spark plug condition and gap

p. 6

FIXED LINE INSTALLATION

Always use original equipment manufacturer 0.105 inch (2.67 mm) replacement line. Lines other than those specified may make the engine overheat or fail.

To install the trimming line:

1. Insert each end of the replacement line into the holes on either side of retention hook (Fig. 18).

2.Push the ends through until they stick out of the sides of

the head (Fig. 19).

WARNING: Never use metal-reinforced line,

 

Fig. 18

 

wire, chain, or rope. These can break off and

 

 

 

 

become dangerous projectiles.

 

 

NOTE: Aligning the release button with the guide recess will help installation (Fig. 13).

CAUTION: Lock the release button in the primary hole and securely tighten the knob before operating this unit.

CAUTION: Add-ons are to be used in the primary hole only. Using the wrong hole could lead to personal injury or damage to the unit.

3.Turn the knob clockwise to tighten (Fig. 15).

WARNING: Always wear eye, hearing, foot and body protection to reduce the risk of injury when operating this unit.

For edging (when using the line head cutting attachment with Rapid-Link™ models), lock the release button of the cutting attachment into the 90° edging hole (Fig. 15).

90˚ Edging Hole

(Trimmer Only)

Knob

Fig. 15

3.

Pull the ends through making sure that the ends are of

 

equal length and the middle of the line is centered between

 

the insertion holes (Fig. 20).

4.

If the ends are not of equal length, push the longer end

 

back through the head part way and pull the shorter end to

 

compensate. Repeat until both ends are the same length.

5.

Push the trimmer line until it lies flat against the cutting

Fig. 19

head (Fig. 21). Make sure the two lengths of cutting line are of equal length. If they are not, adjust until they are.

WARNING: Always use the correct line length when installing trimming line on the unit. If the two lengths of cutting line are not of equal length, the unit may develop a vibration.

HOLDING THE TRIMMER

 

Before operating the unit, stand in the operating position (Fig. 16).

Fig. 16

Check for the following:

•The operator is wearing eye protection and proper clothing

•With a slightly-bent right arm, the operator’s right hand is holding the shaft grip

•The operator’s left arm is straight, the left hand holding the handle

Fig. 20

 

 

 

Fig. 21

 

 

 

5