Cub Cadet ST227S Operator's Manual page 4

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Table Of Contents

Table of Contents

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Enlarged version

OPERATING INSTRUCTIONS

NOTE:

Always keep the trimming line fully extended. Line release becomes more difficult when the cutting line gets shorter.

Each time the head is bumped, about 1 inch (25.4 mm) of trimming line releases. A blade in the cutting head shield will

cut the line to the proper length if any excess line is released.

For best results, tap the bump knob on bare ground or hard soil. If attempting a line release in tall grass, the engine may

stall. Always keep the trimming line fully extended. Line release becomes more difficult when the cutting line gets shorter.

NOTE:

Do not rest the Bump Head™ on the ground while the unit is running.

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

• Keep the cutting head parallel to the ground.

• Do not force the cutting head. 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.

• Cut from right to left whenever possible. Cutting to the left improves the unit's cutting efficiency. Clippings are

thrown away from the operator.

• Slowly move the unit 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 the cutting line is dependent upon:

• Following the trimming techniques

• What vegetation is being 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, etc..

Rotate the whole unit so that the cutting head is at a 30° angle to the ground (Fig. 11).

MAINTENANCE AND REPAIR INSTRUCTIONS

MAINTENANCE SCHEDULE

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.

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.

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.

NOTE:

Please read the California/EPA statement that came with the unit for a complete listing of terms and

coverage for the emissions control devices, such as the spark arrestor, muffler, carburetor, etc.

FREQUENCY

MAINTENANCE REQUIRED

Before starting engine

Fill fuel tank with fresh fuel

Every 10 hours

Clean and re-oil air filter

Every 25 hours

Check spark plug condition and gap

REMOVING THE LINE

WARNING:

Never use metal-reinforced line, wire, chain or rope. These can break off and become

dangerous projectiles.

1. Rotate the bump knob clockwise until all line is

inside the cutting head (Fig. 12).

2. Using a flat-head screwdriver, insert the tip into

the line dimple and just under the exposed

portion of the line (Fig. 13)

3. Pull the line straight out until all line is removed

from the cutting head.

LINE INSTALLATION

Always use original equipment manufacturer 0.095

in. (2.41 mm) replacement line.

1. Align the arrows on the bump knob with the spool

cover eyelets, if they are not already (Fig. 14).

2. Using 16 ft. (4.8 m) of 0.095 in. (2.41 mm)

replacement line push both ends of the line

through the holes in the bump knob until they

protrude through the eyelets on both sides of the

cutting head. Continue pulling the line until

approximately 8 ft. (2.4 m) is visible from both

sides of the cutting head. (Fig. 15)

3. Hold the spool cover, turn the bump knob

clockwise to wind the line around the spool until about 5 in. (12.7 cm) is protruding from each side of the cutting

head. (Fig. 12)

4. Start the unit and bump the cutting head on the ground until the desired cutting length is achieved. Excess line will

be trimmed off by the line blade.

NOTE:

If the cutting line ends are pulled into the cutting head or the line becomes twisted, refer to Removing the Line.

AIR FILTER MAINTENANCE

WARNING:

To avoid serious personal injury, always turn the unit off and allow it to cool before you

clean or service it.

Cleaning the Air Filter

Failure to maintain your air filter properly can result in poor performance or can cause

permanent damage to your engine.

1. Open the air filter cover. Push the locking tab on the top of the cover inward, then

pull the air filter cover out and down. (Fig. 16).

2. Remove the air filter (Fig. 16).

3. Wash the filter in detergent and water. Rinse the filter thoroughly and allow it to

dry.

4. Apply enough clean SAE 30 motor oil to lightly coat the filter.

5. Squeeze the filter to spread and remove excess oil.

6. Replace the filter.

NOTE:

If the unit is operated without the air filter, you will VOID the warranty.

7. Reinstall the air filter cover. Position the slots on the bottom of the air filter cover onto the tabs at the bottom of the

back plate (Figs. 16).

8. Swing the cover up until the tab on the air filter backplate snaps into place in the slot on the air filter cover (Fig. 16).

IDLE SPEED ADJUSTMENT

The idle speed of the engine is adjustable. An idle adjustment screw is between the air filter cover and the engine

starter housing (Fig. 17).

NOTE:

Careless adjustments can seriously damage the unit. An authorized service dealer should make carburetor

adjustments.

WARNING:

The cutting attachment will spin during idle speed adjustments. Wear protective clothing

and observe all safety instructions to prevent serious personal injury.

If, after checking the fuel mixture and cleaning the air filter, the engine still will not idle,

adjust the idle speed screw as follows:

1. Start the engine and run for one minute to warm up. Refer to Starting/Stopping

Instructions.

2. Release the throttle trigger and let the engine idle. If the engine stops, insert a small

phillips screwdriver into the idle adjustment screw (Fig. 17). Turn the idle speed

screw clockwise 1/8 of a turn at a time (as needed) until the engine idles smoothly.

3. If the engine appears to be idling too fast, turn the idle speed screw

counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed.

Checking the fuel mixture, cleaning the air filter and adjusting the idle speed should

solve most engine problems. If not and all of the following are true:

• the engine will not idle

• the engine hesitates or stalls on acceleration

• there is a loss of engine power

Have the carburetor adjusted by an authorized service dealer.

Fig. 10

Fig. 11

Bump

Knob

Dimple

Fig. 12

Fig. 13

Arrows

Eyelet

Fig. 14

Air Filter

Tab

Fig. 16

Idle Adjustment Screw

Fig. 17

MAINTENANCE AND REPAIR INSTRUCTIONS

REPLACING THE SPARK PLUG

Use replacement #753-06193, a Champion® RDJ8J spark plug, or equivalent. The correct air gap is 0.025 inch (0.635 mm).

1. Stop the engine and allow it to cool. Grasp the plug wire firmly and pull it from the spark plug.

2. Clean around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8-inch socket counterclockwise.

WARNING:

Do not sand blast, scrape or clean electrodes. Grit in

the engine could damage the cylinder.

3. Replace a cracked, fouled or dirty spark plug. Set the air gap at 0.025 in. (0.635 mm)

using a feeler gauge (Fig. 18).

4. Install a correctly-gapped spark plug in the cylinder head. Tighten by turning the

5/8-inch socket clockwise until snug.

If using a torque wrench torque to: 110-120 in.•lb. (12.3-13.5 N•m)

Do not over tighten.

WARNING:

To avoid serious personal injury, always turn the unit off and allow it to cool before you

clean or service it.

CLEANING

Use a small brush to clean off the outside of the unit. Do not use strong detergents. Household cleaners that contain

aromatic oils such as pine and lemon, and solvents such as kerosene, can damage plastic housing or handle. Wipe off

any moisture with a soft cloth.

STORAGE

• Never store a fueled unit where fumes may reach an open flame or spark.

• Allow the engine to cool before storing.

• Store the unit locked up to prevent unauthorized use or damage.

• Store the unit in a dry, well-ventilated area.

• Store the unit out of the reach of children.

Short Term Storage (1-2 weeks)

1. Store the unit in a horizontal position. If this is not possible, store the unit vertically with the engine at the top.

Long Term Storage

If planning on storing the unit for an extended time, use the following storage procedure:

1. Drain all fuel from the fuel tank into a container with the same 2-cycle fuel mixture. Do not use fuel that has been

stored for more than 30 days. Dispose of the old fuel/oil mix in accordance with federal, state and local regulations.

2. Start the engine and allow it to run until it stalls. This ensures that all fuel has been drained from the carburetor.

3. Allow the engine to cool. Remove the spark plug and put 5 drops of high quality motor oil into the cylinder. Pull the

starter rope slowly to distribute the oil. Reinstall the spark plug.

NOTE:

Remove the spark plug and drain all of the oil from the cylinder before attempting to start the unit after storage.

4. Thoroughly clean the unit and inspect it for any loose or damaged parts. Repair or replace damaged parts and

tighten loose screws, nuts or bolts. The unit is ready for storage.

SEE

ELECTRIC STARTER AND POWER START BIT™ FEATURES

This unit is designed to be started with an optional electric starter or

p. 3

Power Start Bit™ that are sold separately. If choosing to start the

unit using one of these features or have questions please contact

p. 4

your local retailer or call 1-877-282-8684 U.S, (1-800-668-1238

Canada), for more information and purchasing. You may also go to

p. 4

www.cubcadet.com or www.cubcadet.ca.

Flat-Head

Screw Driver

CAUSE

ENGINE WILL NOT START

Empty fuel tank

Trimmer

Line

Primer bulb wasn't pressed enough

Engine is flooded

Old or improperly mixed fuel

Fouled spark plug

ENGINE WILL NOT IDLE

Air filter is plugged

Old or improperly mixed fuel

Improper idle speed

ENGINE WILL NOT ACCELERATE

Old or improperly mixed fuel

Cutting head bound with grass

Dirty air filter

ENGINE LACKS POWER OR STALLS

Old or improperly mixed fuel

Fouled spark plug

Tab Lock

ENGINE STOPS WHILE IN USE

Engine overspeed protection engaged

CUTTING ATTACHMENT WILL NOT ADVANCE LINE

Air Filter

Cutting attachment bound with grass

Cover

Cutting attachment out of line

Line twisted when refilled

Not enough line is exposed

IF FURTHER ASSISTANCE IS REQUIRED, CONTACT AN AUTHORIZED SERVICE DEALER.

Engine Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle

Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.10 in. (2.794 cm)

Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 cc

Operating RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,500+ rpm

Idle Speed RPM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,200 - 3,400 rpm

Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 in. (0.635 mm)

Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel/Oil Mixture

Fuel/Oil Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40:1

Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 fl.oz. (414 ml)

Total Approximate Unit Weight (without fuel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 13 lbs. (5 - 6 kg)

Cutting Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Proulx™

Shoulder Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Optional

Line Spool Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5 in. (114.3 mm)

Trimming Line Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.095 in. (2.41 mm)

Cutting Path Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 in. (45.72 cm)

* All specifications are based on the latest product information available at the time of printing. We reserve the right

to make changes at any time without notice.

CLEANING AND STORAGE

OPTIONAL ACCESSORY

Electric Start Feature

TROUBLESHOOTING

ACTION

Fill fuel tank with properly mixed fuel

Press primer bulb fully and slowly 10 times

With choke lever in position 3, squeeze the trigger and

pull the starter rope

Drain fuel tank and add fresh fuel mixture