Walk Behind Lawn Mower Owner/Operator Manual Models 911150 – BR21P 911151 – BR21P CARB 911152 – BR21SP 911153 – BR21SP CARB 911154 – BR21SPE ENGLISH 01282100 11/07 Printed in USA
TABLE OF CONTENTS Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Storage . . . . . . . . . . . . . . . . . . . . . . . . . 23 Assembly . . . . . . . . . . . . . . . . . . . . . . . . 9 Troubleshooting . . . . . . . . . . . . . . . . . 23 Controls and Features . . . . . . . . . . . . 11 Service Parts . . . . . . . . . . . . . . . . . . . . 24 Operation . . . . . . . . . . . . . . . . . . . . . . . 12 Accessories . . . . . . . . . . . . . . . . . . . . . 24 Maintenance. . . . . . . . .
UNAUTHORIZED REPLACEMENT PARTS Use only Ariens replacement parts. Replacing any part on this vehicle with anything other than an Ariens authorized replacement part may adversely affect the performance, durability, or safety of this unit and may void the warranty. Ariens disclaims liability for any claims or damages, whether warranty, property damage, personal injury or death arising out of the use of unauthorized replacement parts. To locate your nearest Ariens Dealer, go to www.ariens.com on the internet.
SAFETY CAUTION: POTENTIALLY HAZARDOUS SITUATION! If not avoided, MAY RESULT in minor or moderate injury. It may also be used to alert against unsafe practices. WARNING: This cutting machine is capable of amputating hands and feet and throwing objects. Failure to observe the safety instructions in the manuals and on decals could result in serious injury or death. Slopes are a major factor related to slip and fall accidents. Operation on all slopes requires extra caution.
SAFETY DECALS AND LOCATIONS Do not operate mower unless guards are in operating position or entire bagger is attached. ALWAYS replace missing or damaged safety decals. Refer to Figure 2 for safety decal locations. OL4540 Keep safety devices (guards, shields, switches, etc.) in place and working. 1 OL3030 Go across slopes, not up and down. 3 Look down and behind before and while moving backward. Do not park on a slope unless chocked or blocked.
Read, understand and follow all safety practices in Owner/Operator Manual before beginning assembly. Failure to follow instructions could result in personal injury and/or damage to unit. If the operator or the mechanic cannot read the manual, it is the owner’s responsibility to explain it to them. Only the user can prevent and is responsible for accidents or injuries occurring to themselves, other people or property. ALWAYS remove key (if equipped) and disconnect wire from spark plug before assembly.
If you strike an object, or if equipment vibrates abnormally, stop engine at once, wait for moving parts to stop and disconnect wire from spark plug. Repair any damage before restarting unit. Keep rear door closed when engine is running unless the grass bag is in place. Stop engine before removing and emptying grass bag. When mulching or bagging, ALWAYS install discharge cover. When side discharging, ALWAYS install side discharge deflector.
ALWAYS drain fuel outdoors away from ignition sources. ALWAYS shut off engine , and remove key, and close fuel shutoff valve when transporting unit on a truck or trailer. Avoid Electric Shock. DO NOT disconnect wire from spark plug while engine is running. Do NOT put battery in fire or mutilate. Explosive Gases! NO flames, NO sparks, NO smoking, near battery. Poisonous battery fluid contains sulfuric acid. Contact with skin, eyes or clothing can cause severe chemical burns.
ASSEMBLY 911150, 151, 152, 153 CAUTION: AVOID INJURY. Read and understand the entire Safety section before proceeding. CARTON CONTENTS 1 6 911154 2 3 4 5 OM1706 1. 2. 3. 4. 5. 6. Mower Unit Mulch Cover Side Discharge Chute Mulch Plug Literature Pack Grass Bag Figure 3 Figure 4 ASSEMBLY 1. Remove mower and handlebar from carton. 2. Install the handlebars on the pivot pins attached to the handlebar uprights. NOTE: Make sure the cables (connected to the handlebar) are on the left side of the unit. 3.
911150, 151, 152, 153 911154 7. Fill engine crankcase with oil. See engine manual. 8. Set-up mower for bagging, side discharge or mulching. See MOWER SET-UP on page 14. NOTE: Bagging is not standard on push models. See ACCESSORIES on page 24 for kit part numbers. 9. Fill fuel tank. See FILLING THE FUEL TANK on page 14. 10. Connect the battery. See BATTERY (electric start models) on page 21. 11. Connect spark plug wire. 12. Check the engine/blade control feature.
CONTROLS AND FEATURES 1 19 18 2 3 5 17 20 6 12 4 1 21 9 3 16 18 2 9 4 6 10 7 17 7 13 12 5 8 11 16 9 9 9 15 10 13 8 9 14 Figure 6 1. Engine/Blade Control 2. Wheel Drive Control (911152, 153, 154) 3. Handlebars 4. Grass Bag 5. Rear Door 6. Fuel Tank and Cap 7. Oil Fill/Dipstick 8. Muffler and Muffler Guard 9. Cutting Height Levers (2 Rear Wheel Adjusters, 2 Front Wheel Adjusters) 10. Lift Handle 11. Primer Bulb (911150, 151, 152, 153) 12. Air Filter 13. Mulch Cover 14.
OPERATION CONTROLS AND FEATURES CUTTING HEIGHT ADJUSTMENT See Figure 6 for locations. DANGER: Avoid injury from rotating blade. ALWAYS shut off engine before adjusting cutting height. WARNING: Improper operation can lead to injury. Learn what the controls do and how they work. Thoroughly read and understand entire Operator Manual. CAUTION: On self-propelled models, both rear wheels must be set at same height or traction drive may not work properly. CAUTION: AVOID INJURY.
OPTIONAL CONTROLS Speed Limiter (911152, 153, 154) Primer Bulb (911150, 151, 152, 153) The speed limiter increases or decreases tension in the drive cable, which limits the unit’s forward speed. In the operator’s position, turn the speed limiter to the left to increase maximum forward speed. Turn the speed limiter to the right to decrease maximum forward speed. Push the primer bulb in to add fuel for easier engine start.
MOWER SET-UP CAUTION: DO NOT operate mower unless either side discharge cover or side discharge deflector is installed. Thrown objects may cause damage or injury. Never operate unit with rear door open unless grass bag is in place. CAUTION: If clog or obstruction prevents grass flow, release engine/blade control and disconnect spark plug wire before attempting to clear away any clogs. Ignition Switch (911154) 1 2 A removable key operates the ignition switch.
1 3 2 1 2 1. Side Discharge Chute 2. Knob 4 3 3. Mulch Cover Figure 11 To Mulch 1. Rear Door 2. Bagger Chute 3. Mounting Pin 4. Grass Bag Frame See Figure 12 on page 16. 1. Shut off unit. 2. Remove grass bag and side discharge chute, if installed. 3. Make sure mulch cover is closed and secured with knob. 4. Lift rear door and insert mulch plug with the beveled face to the left. There should be no openings between mulch plug and mounting surface of the deck. 5. Close rear door.
5. With engine/blade control held against the handlebar, grasp starter handle and pull rope slowly until it pulls harder. This is the compression stroke. Let rope rewind slowly. 6. Pull rope with rapid continuous full arm stroke to start engine. Allow rope to rewind slowly. IMPORTANT: DO NOT let starter handle snap against bracket. 7. Repeat steps 4 and 6 until engine starts. (If engine does not start, see TROUBLESHOOTING on page 23.
MAINTENANCE CHECK WHEEL DRIVE CONTROL (self-propelled models) CAUTION: AVOID INJURY. Read and understand the entire Safety section before proceeding. Ariens Dealers will provide any service, parts or adjustments which may be required to keep your unit operating at peak efficiency. Should engine require service, contact an Ariens Dealer or an authorized engine manufacturer's service center.
Sharpen the Mower Blades 3. Check mower blade balance. Slide mower blade on an unthreaded bolt. A balanced blade should remain in a horizontal position. If either end of mower blade moves downward, sharpen the heavy end until blade is balanced (Figure 14). 4. Install mower blade on unit. 5. Tighten the bolts to a torque of 37.5 50 lbf-ft (51-68 N•m). CAUTION: DO NOT sharpen mower blades while on unit. An imbalanced mower blade will cause excessive vibration and eventual damage to unit.
CHECK SPARK PLUG CHECK MUFFLER Spark plug should be replaced every 100 hours of operation or each year. NOTE: Loose spark plug wire terminals can cause sparking. Replace terminal if damaged. Check muffler for debris, cracks, wear, or other damage. CAUTION: Replace worn-out mufflers immediately. Continued use could result in fire or explosion. CHECK ENGINE COOLING WARNING: HOT SURFACES can cause death or serious injury. DO NOT TOUCH parts which are hot from operation. ALWAYS allow parts to cool.
DRIVE BELT REPLACEMENT 1 (self-propelled models) 2 To remove drive belt: 1. Disconnect spark plug wire from spark plug. 2. Remove transmission cover. 3. Disconnect idler return spring from idler arm. See Figure 16. 4. Disconnect the wheel drive cable from transmission mount, and then disconnect drive cable spring from idler arm. 5. Remove belt from transmission input pulley and transmission idlers, and then push the belt out through the belt channel. 6. Put the unit in the service position.
2. Connect the wheel drive cable spring to the idler arm as shown in Figure 19, and then connect the wheel drive cable to the transmission mount. See Figure 16. NOTE: Unit comes equipped with a maintenance-free battery that requires no regular maintenance except cleaning the terminals. To Remove Battery from Unit 1.Disconnect negative (–) cable first, then positive (+) cable (Figure 20). 2.Remove battery cover and battery. Save mounting hardware for reinstallation. To Replace Battery on Unit 1.
To adjust: 1. Move the wheel drive cable adjuster up or down the handlebar. See Figure 22. To increase traction and speed, move the cable adjuster down the handlebar. To decrease traction and speed, move the cable adjuster up the handlebar. 2. Check the adjustment and readjust as needed. Connect battery charger here. Figure 21 WHEEL DRIVE CONTROL ADJUSTMENT (self-propelled models) See Figure 22.
STORAGE Engine CAUTION: AVOID INJURY. Read and understand the entire Safety section before proceeding. IMPORTANT: NEVER spray unit with highpressure water or store unit outdoors. Store mower in a cool, dry, protected location. Cleaning Allow unit to cool. Clean unit thoroughly with mild soap and low pressure water. Brush off dirt and debris from all surfaces. Touch up all scratched surfaces to prevent rust. Matching touch-up paint is available from your Ariens Dealer.
PROBLEM PROBABLE CAUSE CORRECTION Grass does not disperse evenly 1. Too much grass is being removed per cutting. 2. Grass is too wet. 3. Mowing speed is too fast. 1. Raise cutting height. Mower does not bag clippings 1. Grass bag is overfilled. 1. Empty grass bag and do not allow it to overfill. 2. Remove mulching plug. Wheel drive does not engage (SelfPropelled models) 1. Wheel drive control not engaged. 2. Drive belt out of position. 2. Allow grass to dry. 3. Mow slower. 2.
SPECIFICATIONS Model Number 911150 Description BR21P Length - in. (cm) 911152 911154 BR21SP BR21SPE 70 (177.8) Height - in. (cm) 47 (119.4) Width - in. (cm) 21.5 (54.6) Actual Weight - lbs (kg) 69 (31.3) 83 (37.6) 102 (46.2) Cutting Width- in. (cm) 21 (53.3) 21 (53.3) 21 (53.3) 1–4 (2.5 – 10.4) 1–4 (2.5 – 10.4) 1–4 (2.5 – 10.4) Kohler Kohler Honda Cutting Height - in. (cm) Engine, 4 cycle Model Courage ZT-7 Courage ZT-7 GCV160 Engine Power - @ Max. RPM 7.0 lbf-ft (9.
SPECIFICATIONS Model Number Description 911151 911153 BR21P – CARB Length - in. (cm) BR21SP – CARB 70 (177.8) Height - in. (cm) 47 (119.4) Width - in. (cm) 21.5 (54.6) Actual Weight - lbs (kg) 69 (31.3) 83 (37.6) Cutting Width- in. (cm) 21 (53.3) 21 (53.3) 1–4 (2.5 – 10.4) 1–4 (2.5 – 10.4) Kohler Kohler Cutting Height - in. (cm) Engine, 4 cycle Model Engine Power - @ Max. RPM Max Rotation Speed of Cutting Edge - RPM (min-1) Governed RPM (May be different from maximum rpm.
Ariens Limited Warranties 2-Year Limited Lawn and Garden Consumer Warranty Ariens Company (Ariens) warrants to the original purchaser that Ariens and Gravely brand consumer products manufactured by Ariens Company will be free from defects in material and workmanship for a period of two (2) years after the date of purchase, and that Ariens will repair any defect in material or workmanship, and repair or replace any defective part, subject to the conditions, limitations and exclusions set forth herein.
Exceptions, Limitations, Exclusions These warranties are subject to the following conditions, limitations, and exclusions: The following items are excluded from this To obtain warranty service, the following warranty: conditions must be met: • Engines and engine accessories are covered • The purchaser must perform the only by the engine manufacturer’s warranty maintenance and minor adjustments and are not covered by this warranty. explained in the owner’s manual.
Ariens Company 655 West Ryan Street Brillion, WI 54110-1072 920-756-2141 Fax 920-756-2407 www.ariens.