Ariens Sno-Thro Deluxe Series Service Manual
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Ariens Sno-Thro Deluxe Series Service Manual

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Service Manual
®
Deluxe Series Sno-Thro
Models
921045 – Deluxe 24
(SN 100000 +)
921046 – Deluxe 28
(SN 100000 +)
921047 – Deluxe 30
(SN 100000 +)
921048 – Deluxe 28 SHO
(SN 100000 +)
921049 – Deluxe 30 EFI
(SN 100000 +)
921323 – Deluxe 24 CE
(SN 100000 +)
921324 – Deluxe 28 CE
(SN 100000 +)
E10
ENGLISH
05135630B • 12/19

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Questions and answers

Dick McAdams
February 24, 2025

How does the torsion spring on the auger idler work

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1 comments:
Mr. Anderson
February 24, 2025

The torsion spring on the Ariens Sno-Thro Deluxe Series auger idler is installed onto the idler pivot rod. It provides tension to maintain proper positioning and function of the traction drive idler assembly. During disassembly, the torsion spring is removed from the idler pivot rod, and during reinstallation, it is placed back onto the pivot rod along with the traction drive idler assembly.

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Summary of Contents for Ariens Sno-Thro Deluxe Series

  • Page 1 Service Manual ® Deluxe Series Sno-Thro Models 921045 – Deluxe 24 (SN 100000 +) 921046 – Deluxe 28 (SN 100000 +) 921047 – Deluxe 30 (SN 100000 +) 921048 – Deluxe 28 SHO (SN 100000 +) 921049 – Deluxe 30 EFI (SN 100000 +) 921323 –...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SAFETY ........2 TRACTION DRIVE CABLE REPLACEMENT.
  • Page 3 A parts manual and an operator’s manual for your unit are available for free download or purchase at www.ariens.com. AriensCo recommends using only genuine Ariens replacement parts on this unit. Using unauthorized parts may adversely affect the performance, durability or safety of this unit and may void the warranty.

  • Page 4: Safety

    Failure to follow these instructions and warnings may cause death or serious 4. Notice injury. If you have purchased this product from an Ariens NOTICE: Indicates information or procedures that are dealer, the dealer can provide you with training.

  • Page 5: Safety Decals

    SAFETY DECALS Stop engine, remove key, and read manual The safety decals on your machine are visual reminders of before making any repairs or adjustments. the important safety information in this manual. All messages on your unit must be fully understood and carefully followed.

  • Page 6: Safety Rules

    SAFETY RULES Handle fuel with care; it is highly flammable. • Use an approved fuel container. The following safety instructions are based on the B71.3 specifications of the American National Standards Institute • Never add fuel to a running engine or hot engine. in effect at the time of production.
  • Page 7 After striking a foreign object, stop the engine, remove the Never operate the snow thrower without good visibility or wire from the spark plug, disconnect the cord on electric light. Always be sure of your footing, and keep a firm hold motors, thoroughly inspect the snow thrower for any on the handles.
  • Page 8 Always refer to operator's manual for important details if Never fill fuel containers inside a vehicle or on a truck or the snow thrower is to be stored for an extended period. trailer bed with a plastic liner. Always place containers on the ground away from your vehicle before filling.

  • Page 9: Draining Fuel System

    DRAINING FUEL SYSTEM SEPARATE HOUSING FROM FRAME Remove Auger Housing Move unit to an open, well-ventilated area with no flames or sparks. IMPORTANT: Save all hardware for reinstallation. Remove fuel tank cap and siphon fuel into a clean Stop engine, remove key and wait for moving parts to gasoline container.
  • Page 10 See Figure 4. Remove chute deflector cable from J-clamp on engine mount. See Figure 5. Remove hairpin, sleeve bushing and cable eyelet from deflector arm under control panel. Using pliers, compress cable anchor tabs and remove anchor from deflector bracket. IMPORTANT: Reinstall sleeve bushing and hairpin so parts are not misplaced.
  • Page 11 11. Remove hardware retaining belt finger to engine and See Figure 9. remove belt finger. See Figure 7. 13. Position support, such as a trash can, under handlebars so tractor / frame remains upright when separated from auger housing. 14. Chock or block wheels to prevent tractor / frame movement.

  • Page 12: Reinstall Auger Housing

    Reinstall Auger Housing See Figure 12. See Figure 11. WARNING: AVOID INJURY. Attachment sheave With assistance from a capable helper, engage edges are sharp. Wear thick gloves to install attachment clutch lever so attachment brake will not belts onto attachment sheave. obstruct attachment drive pulley in step 2.
  • Page 13 10. Check belt finger clearance: 15. Remove sleeve bushing and hairpin from deflector arm and reinstall cable eyelet onto deflector arm pin. • Engage attachment clutch lever and ensure belt Reinstall sleeve bushing and hairpin. See Figure 14. finger located opposite belt idler is less than 3.2 mm (1/8") from belt, but not touching the belt.

  • Page 14: Bottom Cover Removal

    BOTTOM COVER REMOVAL ATTACHMENT DRIVE BELT REPLACEMENT Remove Bottom Cover Remove Attachment Drive Belts IMPORTANT: Save all hardware for reinstallation. IMPORTANT: Save all hardware for reinstallation. WARNING: AVOID INJURY. Before placing unit Stop engine, remove key and wait for all moving parts in service position, drain fuel from tank and fuel to stop and for hot parts to cool.

  • Page 15: Traction Drive Belt Replacement

    TRACTION DRIVE BELT See Figure 19. Disconnect idler spring from traction idler arm and REPLACEMENT remove spring. Remove Traction Drive Belt Back out stop bolt far enough to allow swing gate to IMPORTANT: Save all hardware for reinstallation. clear bolt. It is not necessary to remove stop bolt. Stop engine, remove key and wait for all moving parts to stop and for hot parts to cool.

  • Page 16: Install Traction Drive Belt

    Install Traction Drive Belt See Figure 20. Rotate traction idler arm away from belt and rotate See Figure 21. swing gate assembly forward. Install belt onto traction sheave and traction drive Remove belt. pulley. Return swing gate assembly into upright position and thread stop bolt fully back into tractor frame.

  • Page 17: Drive Idler Assembly Replacement

    DRIVE IDLER ASSEMBLY See Figure 23. Disconnect torsion spring from attachment idler arm. REPLACEMENT Remove tapping screws retaining attachment idler Remove Attachment Drive Idler Assembly arm to hub and remove idler assembly. IMPORTANT: Save all hardware for reinstallation. Stop engine, remove key and wait for all moving parts to stop and for hot parts to cool.

  • Page 18: Install Traction Drive Idler Assembly

    Install Traction Drive Idler Assembly See Figure 24. Disconnect tension spring from traction drive idler See Figure 26. arm. Reinstall traction drive idler assembly and torsion Remove roll pin. Remove attachment idler arm hub spring onto idler pivot rod. from drive idler pivot rod. Reinstall attachment idler arm hub onto idler pivot rod.

  • Page 19: Install Attachment Drive Idler Assembly

    Install Attachment Drive Idler Assembly Reinstall auger housing. See Reinstall Auger Housing on page 10. See Figure 28. Adjust attachment drive clutch. Refer to Operator’s Secure attachment idler arm to hub with original Manual for adjustment procedure. tapping screws. Reconnect spark plug wire. Reattach torsion spring around attachment idler arm.

  • Page 20: Attachment Brake Replacement

    ATTACHMENT BRAKE REPLACEMENT See Figures 31 and 32. Engage and disengage attachment clutch to verify Remove Attachment Brake brake roller on attachment idler does not interfere with IMPORTANT: Save all hardware for reinstallation. brake pad. Stop engine, remove key and wait for all moving parts IMPORTANT: Ensure brake roller does not bind.

  • Page 21: Friction Disc Replacement

    FRICTION DISC REPLACEMENT WARNING: AVOID INJURY. Before placing unit Remove Friction Disc in service position, drain fuel from tank and fuel system. See Draining Fuel System on page 7. IMPORTANT: Save all hardware for reinstallation. Ensure unit is secure and will not tip. WARNING: AVOID INJURY.
  • Page 22 Remove hardware securing bearing to left side of Remove hex shaft from pinion sprocket and friction frame and remove bearing. See Figure 35. disc assembly and remove friction disc assembly. See Figure 37. Figure 35 Remove two spring clips from hex shaft. See Figure 36.

  • Page 23: Install Friction Disc

    Install Friction Disc See Figure 40. Reinstall bearing onto hex shaft end. Align friction disc assembly with shift fork roller bearing and hex shaft. See Figure 38. Reinstall bearing flange over bearing and secure to frame with three tapping screws. Reinstall spring clips into hex shaft.

  • Page 24: Hex Shaft Bearing Replacement

    HEX SHAFT BEARING REPLACEMENT SWING GATE REPLACEMENT Remove Bearing Remove Swing Gate IMPORTANT: Save all hardware for reinstallation. NOTICE: Save all hardware for reinstallation. Stop engine, remove key and wait for all moving parts Stop engine, remove key and wait for all moving parts to stop and for hot parts to cool.
  • Page 25 Remove belt cover. See Figure 6. Remove bottom cover. See Bottom Cover Removal on page 12. Disconnect traction drive idler spring. See Figure 43. 10. Remove snap clip from right side axle end and remove right wheel and axle key. Take care to not lose axle key.

  • Page 26: Install Swing Gate Assembly

    Install Swing Gate Assembly 12. Remove two hair pins retaining swing gate assembly to swing gate pivot pin and remove pin. See Figure 47. WARNING: AVOID INJURY. Wear thick gloves; traction drive pulley and engine sheave edges are sharp. Position swing gate assembly inside frame. Reinstall traction drive belt on traction drive pulley.

  • Page 27: Auger Replacement

    AUGER REPLACEMENT Secure swing gate assembly to pivot rod with two hairpins inserted curved side up at 90-degree angles Remove Auger to the gate. See Figure 50. IMPORTANT: Save all hardware for reinstallation. Stop engine, remove key and wait for all moving parts to stop and for hot parts to cool.
  • Page 28 Remove hardware retaining support bushings to auger Remove auger assembly from housing. See housing. See Figure 52. Figure 54. Figure 52 Remove hardware retaining gearcase support Figure 54 brackets to auger housing. See Figure 53. 10. Remove shear bolt from auger shaft. See Figure 55. Figure 55 11.

  • Page 29: Install Auger

    See Figure 57. Align holes in auger with holes in auger shaft and reinstall shear bolt. Torque bolt to 7.9 N•m – 16.5 N•m 12. Remove auger. Use of penetrating oil or heat may be (5.8 lb-ft – 12.2 lb-ft). If torque wrench is unavailable, necessary to remove auger.
  • Page 30 Secure support brackets to auger housing with original See Figure 63. round head square neck bolts and top locking flange Tighten three hex nuts retaining bearing plate. nuts. See Figure 61. Apply a thin layer of anti-seize compound to impeller shaft end.

  • Page 31: Auger Gearcase Replacement

    AUGER GEARCASE REPLACEMENT See Figure 65. Remove roll pins retaining impeller to impeller shaft Remove Gearcase Assembly and remove impeller. IMPORTANT: Save all hardware for reinstallation. IMPORTANT: Use of penetrating oil or heat may be Stop engine, remove key and wait for all moving parts necessary to remove impeller.

  • Page 32: Install Gearcase Assembly

    Install Gearcase Assembly IMPELLER REPLACEMENT Secure impeller to impeller shaft with two roll pins. Remove Impeller Reinstall one flat steel washer onto each auger shaft IMPORTANT: Save all hardware for reinstallation. end. Stop engine, remove key and wait for all moving parts Reinstall support brackets to gearcase and secure to stop and for hot parts to cool.

  • Page 33: Install Impeller

    Install Impeller See Figure 70. Tighten three hex nuts securing bearing plate to See Figure 68. housing. Apply a thin layer of anti-seize compound to impeller Apply a thin layer of anti-seize compound to impeller shaft. shaft end. Secure impeller to impeller shaft with two roll pins. Reinstall spacer bushing onto impeller shaft.

  • Page 34: Engine Replacement

    ENGINE REPLACEMENT See Figure 72. Remove engine mounting hardware. Remove Engine Remove J-clamp and chute deflector cable from IMPORTANT: Save all hardware for reinstallation. engine mount. Stop engine, remove key and wait for all moving parts to stop and for hot parts to cool. Disconnect spark plug wire.

  • Page 35: Install Engine

    Install Engine See Figure 73. 11. Remove hardware securing attachment sheave to crankshaft. WARNING: AVOID INJURY. Engine is heavy. NEVER lift engine without a suitable lifting device 12. Remove attachment sheave and traction sheave from or capable assistant. crankshaft. Using a suitable lifting device or help from a capable Type 1 assistant, lift engine and lower onto bolts in frame.
  • Page 36 See Figure 74 and Figure 75. See Figure 76. Reinstall traction drive sheave onto crankshaft. Reinstall idler spring to traction idler arm. Reinstall traction drive belt onto traction sheave. Secure attachment sheave to crankshaft with one locking washer and hex bolt. Torque bolt to Reinstall attachment drive sheave onto crankshaft.
  • Page 37 See Figure 77. See Figure 78. 10. Reinstall attachment drive belts onto attachment 12. Check belt finger clearance: sheave. • Engage attachment clutch lever and ensure belt To assist belt installation, slowly pull recoil starter handle finger located opposite belt idler is less than 3.2 mm while gently guiding belts into attachment sheave.

  • Page 38: Traction Drive Cable Replacement

    TRACTION DRIVE CABLE See Figure 80. Disconnect lower traction drive cable from upper REPLACEMENT traction drive cable. Remove Traction Drive Clutch Cable Loosen, but DO NOT remove shoulder bolt retaining IMPORTANT: Save all hardware for reinstallation. cable pulley to cable pulley bracket. Stop engine, remove key and wait for all moving parts to stop and for hot parts to cool.

  • Page 39: Install Traction Drive Clutch Cable

    Install Traction Drive Clutch Cable Disconnect lower traction clutch cable from swing gate. See Figure 81. WARNING: AVOID INJURY. Before placing unit in service position, drain fuel from tank and fuel system. See Draining Fuel System on page 7. Ensure unit is secure and will not tip. Place unit in service position and remove bottom cover.

  • Page 40: Dual-Handle Interlock Cam Replacement

    DUAL-HANDLE INTERLOCK CAM See Figure 83. Align cable with cable pulley and tighten shoulder bolt. REPLACEMENT Reconnect lower traction clutch cable to upper traction Remove Interlock Cam clutch cable. IMPORTANT: Save all hardware for reinstallation. See Figure 84. Remove spring from interlock bracket. Remove two spring clips securing interlock cams to camshafts.

  • Page 41: Install Interlock Cams

    Install Interlock Cams IMPORTANT: Interlock cams will fall from camshafts in next step. IMPORTANT: Ensure nylon bushings are seated in Remove hardware retaining camshafts to clutch levers interlock bracket. See Figure 86. and remove camshafts. See Figure 85. Models 921045, 921046, 921048 Models 921045, 921046, 921048 Models 921047, 921049, 921323, 921324 Models 921047, 921049, 921323, 921324...
  • Page 42 Install interlock cam onto camshaft so flat edge is See Figure 88. positioned downward. Secure with spring clip. See Position left interlock cam inside interlock bracket and Figure 87. align with left camshaft. Insert camshaft through interlock bracket and into Models 921045, 921046, 921048 interlock cam.

  • Page 43: Axle Bushing Replacement

    Install bushing onto axle and secure to frame with IMPORTANT: If dual-handle interlock continues to three tapping screws from inside frame. malfunction, see your Ariens dealer. Reinstall flat steel washer. Reinstall bottom cover and secure with two tapping screws and four hex bolts.

  • Page 44: Remove Right Axle Bushing

    Remove Right Axle Bushing See Figure 92. IMPORTANT: Two inner flat steel washers will fall when IMPORTANT: Save all hardware for reinstallation. short axle is removed. WARNING: AVOID INJURY. Before placing unit Remove outer flat steel washer from short axle. in service position, drain fuel from tank and fuel Support differential gear and remove short axle.

  • Page 45: Install Right Axle Bushing

    Install Right Axle Bushing See Figure 96. Align differential gear with pinion gear and short axle. Secure bushing to frame exterior with three tapping Fully insert short axle into differential gear. screws from inside frame. See Figure 94. Reinstall outer flat steel washer on short axle. Figure 96 See Figure 97.

  • Page 46: Flange Bushing Replacement

    FLANGE BUSHING REPLACEMENT Remove flange bushings from pinion gear. See Figure 99. IMPORTANT: Save all hardware for reinstallation. WARNING: AVOID INJURY. Before placing unit in service position, drain fuel from tank and fuel system. See Draining Fuel System on page 7. Ensure unit is secure and will not tip.

  • Page 47: Differential Gear Replacement

    DIFFERENTIAL GEAR REPLACEMENT See Figure 101. Insert pinion shaft end into left side of frame. Remove Differential Gear Position flat steel washer against pinion gear and IMPORTANT: Save all hardware for reinstallation. reinstall spring clip. WARNING: AVOID INJURY. Before placing unit in service position, drain fuel from tank and fuel system.

  • Page 48: Install Differential Gear

    See Figure 103. See Figure 105. IMPORTANT: Two flat steel washers will fall when short Align differential gear with pinion gear and short axle. axle is removed. Fully insert short axle into differential gear. Remove outer flat steel washer from short axle. Reinstall flat steel washer on short axle.

  • Page 49: Chute Gear Replacement

    CHUTE GEAR REPLACEMENT Remove hardware securing pinion gear bracket to chute pedestal and remove bracket. See Figure 108. Remove Pinion Gear IMPORTANT: Save all hardware for reinstallation unless specified otherwise. Stop engine, remove key and wait for all moving parts to stop and for hot parts to cool.

  • Page 50: Remove Chute Rotation Gear

    Remove Chute Rotation Gear Remove hardware securing pinion gear bracket to pedestal plate and remove bracket. See Figure 111. IMPORTANT: Save all hardware for reinstallation Stop engine, remove key and wait for all moving parts to stop and for hot parts to cool. Disconnect spark plug wire from engine.

  • Page 51: Install Chute Rotation Gear

    Install Chute Rotation Gear SCRAPER BLADE REPLACEMENT Position discharge chute facing forward. Remove Scraper Blade See Figure 113. IMPORTANT: Save all hardware for reinstallation. Position chute rotation gear on chute mount with flat edge square to chute mount bracket. WARNING: AVOID INJURY. Before tipping unit onto handlebars, drain fuel from tank and fuel Reposition flat steel washer and friction washer system.

  • Page 52: Install Scraper Blade

    Install Scraper Blade HEADLIGHT REPLACEMENT Position scraper blade inside auger housing and align Remove Bulb with holes in housing. IMPORTANT: Save all hardware for reinstallation. Insert seven flat head square neck bolts through Stop engine, remove key and wait for all moving parts scraper blade from inside housing.

  • Page 53: Install Bulb

    EFI BATTERY REPLACEMENT Turn bulb one-eighth turn counterclockwise and remove from headlight bezel. See Figure 118. Model 921049 Remove Battery IMPORTANT: Save all hardware for reinstallation. Stop engine, remove key and wait for all moving parts to stop and for hot parts to cool. Disconnect spark plug wire.

  • Page 54: Install Battery

    See Figure 120. See Figure 122. Disconnect wire harness from battery connector. Secure battery bracket to control panel with original hardware. Remove hardware retaining battery bracket and remove bracket. Reconnect battery connector to wire harness. Figure 122 Reinstall ECU and secure to control panel with original hardware.

  • Page 55: Replace Engine Control Unit (Ecu)

    REPLACE ENGINE CONTROL UNIT Install ECU (ECU) Secure ECU to bracket with original hardware. See Figure 125. Model 921049 Secure ECU bracket to control panel with original Remove ECU hardware. See Figure 123. IMPORTANT: Save all hardware for reinstallation. Reconnect wire harnesses to ECU. Stop engine, remove key and wait for all moving parts Reconnect spark plug wire.

  • Page 56: Gearcase Rebuild

    GEARCASE REBUILD See Figure 127. Remove hardware retaining gearcase cover and Disassemble Gearcase remove cover. IMPORTANT: Save all parts for reassembly, unless Remove gasket and drain gearcase. otherwise specified. Remove gearcase. See Remove Gearcase Assembly on page 29. Remove any rust, if present, from auger and impeller shafts with sandpaper.
  • Page 57 See Figure 129. 10. Using snap ring pliers, remove retaining ring. See Figure 131. Press auger shaft through the right side of gearcase. NOTICE: DO NOT strike auger shaft end; use a press. Remove seal, bushing and washer from auger shaft. Figure 131 See Figure 132.

  • Page 58: Assemble Gearcase

    Assemble Gearcase 14. Remove seals and flange bushings from gearcase. See Figure 133. See Figure 134. Press rear seal into gearcase until flush with gearcase exterior. IMPORTANT: DO NOT press left seal into gearcase. Reinstall left and rear flange bushings. Figure 133 1.
  • Page 59 See Figure 136. Reinstall impeller shaft through front of gearcase and reinstall thrust collar onto impeller shaft end. Wrap a seal protector around impeller shaft end and insert shaft through gearcase seal. Remove seal protector. NOTICE: Unprotected seals can be damaged when rough edges in shaft, such as holes, pass through seal.
  • Page 60 10. Reinstall retaining ring. See Figure 139. See Figure 141. 14. Reinstall one flat steel washer and bushing onto right auger shaft end. IMPORTANT: Stepped-down side of bushing MUST be positioned toward gearcase. Figure 139 11. Turn impeller shaft by hand to ensure shaft rotates easily.
  • Page 61 See Figure 143. 19. Turn impeller shaft by hand to ensure auger shaft rotates easily. 16. Wrap seal protector around each auger shaft end so holes in shaft are covered. 20. Reinstall bushing retainer into flange bushing groove. See Figure 144. NOTICE: Unprotected seals can be damaged when installed over rough edges in shaft, such as holes.
  • Page 62 24. Add gearcase oil. Oil level MUST be 6.1 cm – 6.7 cm (2.4" – 2.6") from the flat surface of the gearcase cover. IMPORTANT: Ariens recommends using only Ariens L3 synthetic severe duty gear lube. Using other lubricants will not automatically void unit warranty, but the warranty will not cover damage caused by using unauthorized lubricants.

  • Page 63: Efi Troubleshooting

    EFI TROUBLESHOOTING EFI REPLACEMENT COMPONENTS....62 EFI TROUBLE CODE IDENTIFICATION ... 61 CHECKING TROUBLE CODES ....64 TROUBLE CODE DIAGNOSTICS.

  • Page 64: Efi Replacement Components

    Using unauthorized parts may adversely affect the performance, durability or safety of this unit and may void the warranty. Click the Parts Diagrams by Parts Radar link at www.ariens.com for replacement part numbers of the items listed below: • ECU...
  • Page 65 Fuel Injector Servo Motor Servo-Operated Engine Throttle Plate Temperature Sensor Fuel Pump With Internal Filter Fuel Inlet Fuel Pressure Sensor (Internal) Figure 150 Inline Fuel Filter Throttle Body Assembly* Sealing O-Ring Fuel Pump Figure 149 *Throttle body assembly consists of fuel injector, fuel pressure sensor and servo-operated throttle plate.

  • Page 66: Efi Trouble Code Identification

    EFI TROUBLE CODE IDENTIFICATION CHECKING TROUBLE CODES The blinking red LED light on the ECU displays trouble Trouble Problem Correction codes. Its sequence indicates a particular system Code malfunction by blinking as many times as the first digit of a Low Battery Voltage Check charging trouble code, pausing, and then blinking as many times as system and battery.

  • Page 67: Trouble Code Diagnostics

    TROUBLE CODE DIAGNOSTICS NOTICE: Before performing diagnostic tasks, be aware of the screw on the bottom of the throttle body that adjusts the servo offset. The servo offset calibrates the throttle body at the factory using a flow bench and should NEVER be touched.

  • Page 68: Code 21: Barometer Sensor

    Code 21: Barometer Sensor Code 23: EFI System Cannot Sustain Desired RPM See Figure 147. The ECU reads the RPM through the alternator. If a faulty This trouble code indicates the barometric pressure sensor connection exists, the ECU will not read the RPM correctly. has failed.
  • Page 69 Inline Fuel Filter Center Tab Figure 157 Check fuel pump wiring to ensure it is connected correctly. See Figure 158. Figure 159 Fuel Pump Wires IMPORTANT: Fuel pump voltage MUST be measured within 30 seconds of the ignition switch being turned to the ON position.

  • Page 70: Code 28: High Battery Voltage

    DIAGNOSTICS FOR NON-TROUBLE Remove pump from tank. Reconnect pump wires. CODES Turn the ignition key to the ON position and listen for a IMPORTANT: The following conditions and diagnostic “humming” noise. procedures apply to EFI components only. If fuel pump is silent, replace fuel pump. Engine Starts and Loses Power If voltage is within range and fuel pump is operating If the engine starts and loses power immediately, this is...
  • Page 71 recoil starter handle to check for spark. If no spark is present, replace spark plug. f. Reinstall spark plug and finger tighten. Turn an additional 1/4 turn after spark plug is seated. g. Reinstall spark plug wire and make sure it is correctly positioned onto the spark plug.
  • Page 72 If voltage is within range and the fuel injector is not operating correctly with the key in the ON position, replace throttle body assembly. Figure 164 c. If no voltage is present at the injector, check battery voltage by probing the red and white wires on the 12-pin ECU connector with the red probe and contact the black probe against the engine block.

  • Page 73: Surging Run Condition

    If no voltage is present at the ECU, replace ECU. If voltage With an inline spark tester, check ignition for is present at the ECU, check wires for kinks or damage. If intermittent spark. damage is present repair wires if possible, or replace Check fuel pump output.

  • Page 74: Fluttering Servo Motor

    Also see Figure 168. c. Position the black probe on the engine block. d. Turn ignition key to ON position. e. Turn the potentiometer from low-idle to full throttle. Voltage to the red wire should measure 4.90 V DC – 5.0 V DC at both low-idle and full throttle positions.

  • Page 75: Service Record

    SERVICE RECORD DATE SERVICE COMPLETED NOTES EN – 73...
  • Page 76 655 West Ryan Street Brillion, WI 54110 www.ariens.com parts.ariens.com...

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