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on the purchase of your new Exmark mower. This product has been carefully designed and manufactured to give
you a maximum amount of dependability and years of trouble-free operation. If additional information is needed, or should you require trained
mechanic service, contact your authorized Exmark equipment dealer or distributor. If you need to order replacement parts from your dealer,
always give the model number and serial number of your mower as well as the part number, description and quantity of the part needed.
The Serial No. plate is located on the top of the mower deck on the right hand corner of the machine. For ease of ordering and reference,
wesuggest that you record the information requested in the following identification table.
Place Model No. and Serial No. Label Here
(Included in Literature Pack)
or Fill in Below
Model No.
Serial No.
MFG. CO. INC.
®
Engine Model No. and Spec. No. (Code)
Engine Serial No. (E/No)
Date Purchased
For Serial Nos.
670,000 & Higher
®
Part No. 109-4826 Rev. A

Summary of Contents

  • Page 1

    on the purchase of your new Exmark mower. This product has been carefully designed and manufactured to give you a maximum amount of dependability and years of trouble-free operation. If additional information is needed, or should you require trained mechanic service, contact your authorized Exmark equipment dealer or distributor. If you need to order replacement parts from your dealer, always give the model number and serial number of your mower as well as the part number, description and quantity of the part needed.

  • Page 2

    POTENTIAL HAZARD ♦ This product is a piece of power equipment. WHAT CAN HAPPEN ♦ Failure to follow safe operating practices can result in serious operator injury or even death. HOW TO AVOID THE HAZARD ♦ Keep all shields, guards, and safety devices (especially the grass discharge system) in place and in proper working condition.

  • Page 3

    EXMARK PARTS PLUS EFFECTIVE DATE: September 1, 1995 Program If your Exmark dealer does not have the Exmark part in stock, Exmark will get the parts to the dealer the next business day or the part will be FREE* Guaranteed!! How the Program Works If dealer does not have part in stock for a "down"...

  • Page 4

    CONGRATULATIONS on the purchase of your Exmark Mower. This product has been carefully designed and manufactured to give you a maximum amount of dependability and years of trouble- free operation. This manual contains operating, maintenance, adjustment, and safety instructions for your Exmark mower.

  • Page 5: Table Of Contents

    4. MAINTENANCE Checking the Engine Oil Level ... 22 Checking the Blade Brake Clutch... 22 Cleaning the Underside of the Lawn Mower Housing ... 22-23 Cleaning the Discharge Tunnel and Plug ... 23-24 Servicing the Air Filter ... 24-26 Maintaining the Blade ... 26-28 Cleaning the under the belt cover...

  • Page 6: Safety Alert Symbol, Training, Preparation, Preparation

    1. SAFETY This lawn mower meets or exceeds the CPSC blade safety requirements for walk- behind rotary mowers and the B71.4 specifications of the American National Standards Institute in effect at the time of production. Exmark designed and tested this lawn mower to offer reasonably safe service; however, failure to comply with the following instructions may result in personal injury.

  • Page 7

    POTENTIAL HAZARD ♦ This machine produces sound levels in excess of 85 dBA at the operator’s ear when in operation. WHAT CAN HAPPEN ♦ Exposure to sound levels of 85 dBA or above for extended periods of time can cause hearing loss. HOW TO AVOID THE HAZARD ♦...

  • Page 8

    DANGER POTENTIAL HAZARD ♦ In certain conditions gasoline is extremely flammable and highly explosive. WHAT CAN HAPPEN ♦ A fire or explosion from gasoline can burn you, others, and cause property damage. HOW TO AVOID THE HAZARD ♦ DO NOT smoke while refueling, and stay away from an open flame or where gasoline fumes may be ignited by spark.

  • Page 9

    DANGER POTENTIAL HAZARD ♦ In certain conditions gasoline is extremely flammable and highly explosive. WHAT CAN HAPPEN ♦ A static charge can ignite gasoline vapors. A fire or explosion from gasoline can burn you, others, and cause property damage. HOW TO AVOID THE HAZARD ♦...

  • Page 10: Operation

    POTENTIAL HAZARD ♦ Gasoline vapor can collect inside enclosed trailers and may be ignited by electrical sparks or hot engine/exhaust components. WHAT CAN HAPPEN ♦ Explosion and fire may occur, resulting in property damage, personal injury and/or death. HOW TO AVOID THE HAZARD ♦...

  • Page 11

    1.4.1 Give complete, undivided attention to the job at hand. 1.4.2 Mow only in daylight or in good artificial light, keeping away from holes or hidden hazards. DO NOT operate the mower when children or others are in the area. 1.4.3 When feasible, avoid operating the equipment in wet grass.

  • Page 12: Maintenance & Storage, Operation, Maintenance & Storage

    1.4.11 Keep hands, feet, and clothing away from rotating parts while the mower is being operated. Keep clear of the discharge opening at all times. 1.4.12 Stop the engine, wait for all moving parts to stop, and remove the spark plug wire(s) and/or remove key: Before checking, cleaning, or working on the mower.

  • Page 13: Safety Signs, Safety Signs

    1.5.8 Keep all guards, shields and safety devices in place and in safe working condition. 1.5.9 Frequently check for worn or damaged components that could create a hazard. 1.5.10 All replacement parts must be the same as or equivalent to the parts supplied as original equipment.

  • Page 14

    For Units without a Blade Brake Clutch PART NO.: 39-5770 LOCATION: Top RH Surface of Mower Deck For Units with a Blade Brake Clutch PART NO.: 103-6328 LOCATION: Top Surface of Throttle Control PART NO.: 104-8585 LOCATION: Top LH Surface of Mower Deck For Units with a Blade Brake Clutch PART NO.: 43-8480 LOCATION: Top RH Surface of Mower Deck...

  • Page 15: Model Numbers, Engine, Fuel System, Safety Interlock System, Transmission, Deck, Dimensions, Controls

    2. SPECIFICATIONS 2.1 MODEL NUMBER: MPKA21; MSKA21, MSKA21B; MSHN21; MSHN21B 2.2 ENGINE 2.2.1 Engine Specifications: See your engine owner's manual. 2.2.2 RPM (No Load): 3300 rpm 2.3 FUEL SYSTEM 2.3.1 Capacity: 4 qt. (3.8 liter) Kawasaki Units; 2.1 qt (2.0 liter) Honda Units 2.3.2 Type of Fuel: Use only clean, fresh, regular grade, unleaded gasoline with the pump sticker octane rating of 87 or higher.

  • Page 16: Controls

    3.1.2 Blade Control Bail: Located on the upper handle as shown in Figure 1. When the blade control bail is depressed, the system senses that the operator is in the normal operator's position. For units with a Blade Brake Clutch: When the blade control bail is released, the system senses that the operator has moved from the normal operating position and will stop the blade.

  • Page 17: Pre-start, Pre-start

    3.1.7 Fuel Shut-Off Valve: For Kawasaki Units: The fuel shut off valve is installed on the fuel line midway between the fuel tank and the engine as shown in Figure 3. For Honda Units: The fuel shut off valve is located on the engine as shown in Figure 4.

  • Page 18

    expect to use in 30 days. Using unleaded gasoline results in fewer combustion deposits and longer engine life. NOTE: Do not add oil to the gasoline. NOTE: Do not use methanol, gasoline containing methanol, gasohol containing more the 10% ethanol, premium gasoline or white gas. Using these fuels can damage the engine’s fuel system.

  • Page 19: Operating Instructions, Operating Instructions

    Authorized Service Dealer. 3.3.4 Using the Self-Propel Drive (Self-Propelled Units Only): The lawn mower has three ground speeds. 1 is slow, 2 is medium, and 3 is fast Start the engine. Using the ground speed control, select the desired ground speed.

  • Page 20

    Take a half sheet of newspaper and crumple it into ball small enough to go under the deck (about three inches or 76 mm in diameter) as shown in Figure 7. G1112 Place the ball of newspaper five inches (12.7 cm) in front of the lawn mower (Fig. 8). 5 in (12.7 cm)

  • Page 21

    11. Immediately push the lawn mower over the newspaper ball. 12. Stop the engine and wait for all moving parts to stop. 13. Walk around the lawn mower to check for the newspaper ball. If the ball did not go under the deck, repeat step 7 through 12.

  • Page 22

    3.3.8 Adjusting the Cutting Height Each wheel is adjusted individually with a wheel height adjustment lever. The cutting heights are listed in the following table. 0.75 in (19 mm) 1.25 in (32 mm) 1.75 in (44 mm) POTENTIAL HAZARD ♦ Adjusting the cutting height levers could bring your hands into contact with a moving blade.

  • Page 23

    Pull the discharge door handle forward until the pin clears the catch, and move the handle rearward until the pin locks in the bag notch (Fig. 11). Pin locked in bag notch NOTE: The discharge door in the lawn mower housing is now open. Mowing with the Grass Bag WARNING POTENTIAL HAZARD ♦...

  • Page 24

    To install the bag, refer to the Installing the Grass Bag in Section 3.3.9. POTENTIAL HAZARD ♦ If the discharge door does not close completely, the lawn mower could throw objects. WHAT CAN HAPPEN ♦ Thrown objects can result serious personal injury or death to the operator or bystanders.

  • Page 25

    If the grass is too long and the leaves clump on top of the lawn, the lawn mower may plug and cause the engine to stall. •...

  • Page 26

    4. MAINTENANCE NOTE: Determine the left and right sides of the machine from the normal operating position. Recommended Maintenance Schedule Service Interval Each Use 5 Hours 50 Hours 75 Hours 100 Hours 250 Hours 300 Hours Storage Change the engine oil after the first 5 operating hours. NOTE: Refer to your engine operator’s manual for additional maintenance procedures.

  • Page 27: Checking The Engine Oil Level, Checking The Blade Brake Clutch

    5. Disengage the blade, stop the engine and wait for all moving parts to stop. 6. Turn off the water. 7. Start the lawn mower, engage the blade, and let the lawn mower run for a few minutes to dry out its components.

  • Page 28: Cleaning The Discharge Tunnel And Plug, Cleaning The Discharge Tunnel And Plug

    Scraping Method If washing does not remove all debris from under the lawn mower, scrape it clean. 1. Disconnect the wire from the spark plug. 2. Drain the fuel from the fuel tank. Refer to Emptying the Fuel tank and Cleaning the Fuel Filter.

  • Page 29: Servicing The Air Filter, Servicing The Air Filter

    ♦ Thrown objects can cause serious injury or kill the operator or bystanders. HOW TO AVOID THE HAZARD ♦ Never start or operate the lawn mower unless one of the following is true: The discharge tunnel plug is locked securely in the discharge tunnel.

  • Page 30

    6. Saturate the pre-cleaner with clean engine oil, then squeeze it (do not twist) to remove the excess oil. 7. Install the foam pre-cleaner. 8. Install the new paper air filter. 9. Install the cover. For Honda Units: Service Interval: Inspect the air cleaner elements after each use.

  • Page 31: Maintaining The Blade, Maintaining The Blade

    If you notice a slot or wear (Fig. 20B and 20C), replace the blade. NOTE: For the best performance, install a new blade before the cutting season begins.

  • Page 32

    For Blade Brake Clutch Units: Install a sharp, balanced Exmark blade, the accelerator, the anti-scalp cup, and the blade nuts. The sail of the blade must point toward the top of the lawn mower housing for proper installation. Torque the blade nuts to 15-27 ft-lb (20-37 N m).

  • Page 33: Cleaning The Blade Brake Clutch Shield, Cleaning The Blade Brake Clutch Shield

    1. Stop the engine and wait for all moving parts to stop. 2. Disconnect the wire from the spark plug (Fig 5 & 7). 3. Remove the bolts that secure the belt cover to the lawn mower housing (Fig. 23). Belt Cover 4.

  • Page 34: Emptying The Fuel Tank And Cleaning The Fuel Filter

    POTENTIAL HAZARD ♦ Tipping the lawn mower may cause the fuel to leak from the carburetor or the fuel tank. WHAT CAN HAPPEN ♦ Gasoline is extremely flammable, highly explosive, and under certain conditions, can cause personal injury or property damage.

  • Page 35: Lubricating The Pivot Arms, Servicing The Spark Plug, Servicing The Spark Plug

    1. Close the door in the lawn mower housing and remove the grass bag. 2. If the lawn mower does not self propel, rotate the control knob clockwise 1/2 turn to tighten the belt.

  • Page 36: Changing The Engine Oil, Changing The Oil Filter

    5. Clean around the dipstick. 6. Remove the dipstick by rotating the cap counterclockwise and pulling it out. 7. Raise the left side of the lawn mower to drain the oil form the dipstick fill tube into the drain pan.

  • Page 37

    Oil Filter G0227 Figure 28 1. Run the engine to warm the oil. POTENTIAL HAZARD ♦ Oil may be hot after engine has been run. WHAT CAN HAPPEN ♦ Contact with hot oil can cause severe personal injury. HOW TO AVOID THE HAZARD ♦...

  • Page 38: Lubricating The Gear Case, Adjusting The Blade Brake Cable

    14. Recycle the used oil filter according to local codes. 4.15 Lubricating the Gear Case (Self-Propelled Units Only): Service Interval: After every 100 operating, grease the gear case. 1. Remove the grass bag. 2. Install a grease gun onto the fitting through the belt cover opening (Fig. 30) Grease Fitting Belt Cover G0229...

  • Page 39: Servicing The Wheels, Preparing The Fuel System, Preparing The Fuel System

    Preparing the fuel system. To prepare the lawn mower for off season storage, perform the recommended maintenance procedures. Store the lawn mower in a cool, clean, dry place. Cover the lawn mower to keep it clean and protected. Bearing/Hub Wheel...

  • Page 40: General Storage Information, Removing The Lawn Mower From Storage, Removing The Lawn Mower From Storage

    5. Install the spark plug but do not connect the wire to the spark plug. General Storage Information 1. Clean the lawn mower housing. Refer to Section 4.3 Cleaning the Underside of the Lawn Mower Housing. 2. Clean any dirt and chaff from the cylinder, cylinder head fins, and blower housing.

  • Page 41: Accessories, Troubleshooting, Troubleshooting

    Side Discharge Kit 7. TROUBLESHOOTING Exmark designed and built your lawn mower for trouble free operation. Check the following components and items carefully, and refer to Section and Maintenance for more information. If a problem continues, contact an Authorized Service Dealer.

  • Page 42

    Problem Engine runs rough Lawn mower or engine vibrates excessively Uneven cutting pattern Discharge chute plugs Lawn mower does not self- propel (Self-Propelled Models Only) Possible Causes 1. The wire is not connected to the spark plug. 2. The spark plug is pitted, fouled, or the gap is incorrect.

  • Page 43: Warranty

    Products • All Products (except as noted below) • All Attachments and Accessories • Metro 21 Series • Belts and Tires • Battery • Engine* Warranty is covered by engine manufacturer *Please refer to the engine manufacturer’s warranty statement...

  • Page 44

    NOTES - 39 -...

  • Page 45

    NOTES - 40 -...

  • Page 46

    NOTES - 41 -...

  • Page 47

    SERVICE RECORD Date Description of Work Done Service Done By - 42 -...

  • Page 48

    SEE EXMARK’S COMPLETE CUSTOM RIDE SEAT SUSPENSION SYSTEM ROLL OVER PROTECTION SYSTEM (ROPS) ULTRA VAC COLLECTION SYSTEM ULTRA VAC QUICK DISPOSAL SYSTEM © 1997-2007 EXMARK MFG. CO. INC. INDUSTRIAL PARK BOX 808 BEATRICE, NE 68310 ALL RIGHTS RESERVED LINE OF ACCESSORIES RIDING ACCESSORIES DECK LIFT ASSIST KIT HITCH KIT...

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