Ariens 921063 Service Manual

The Ariens 921063 is a professional-grade snow thrower designed for heavy-duty winter conditions. This service manual provides comprehensive information for maintenance, troubleshooting, and repair procedures. Below are key sections covering safety, specifications, maintenance schedules, engine service, drive system, auger/impeller assembly, electrical system, controls, troubleshooting, and parts diagrams.

Specifications

Key technical data for the Ariens 921063 snow thrower.

Feature	Description
Model	Ariens 921063
Engine Type	4-Cycle OHV
Engine Displacement	306cc
Clearing Width	28 inches
Intake Height	21 inches
Drive System	2-Stage, 6-Speed (Forward/2 Reverse)
Auger Material	Steel with rubber paddles
Chute Control	Hand-operated crank & deflector
Starting System	Electric Start (with recoil backup)
Fuel Tank Capacity	1.5 gallons

Safety Precautions

Critical safety instructions for operation and service.

1. Always disconnect spark plug before performing any maintenance.
2. Use in well-ventilated areas to avoid carbon monoxide poisoning.
3. Wear appropriate safety gear: gloves, eye protection, sturdy footwear.
4. Keep hands and feet away from moving parts during operation.
5. Never attempt to clear clogged chute with engine running.

WARNING! Failure to follow safety procedures can result in serious injury or death. Always refer to this manual before servicing.

Maintenance Schedule

Recommended service intervals for optimal performance.

1. Before Each Use: Check engine oil level, inspect auger/impeller for damage, verify controls operation.
2. Every 25 Hours: Change engine oil (first change at 5 hours), check drive belt tension, lubricate control linkages.
3. Every 50 Hours: Replace spark plug, clean air filter, inspect shear pins.
4. Every 100 Hours: Check tire pressure, inspect scraper bar, clean fuel system.
5. Seasonal: Stabilize fuel or drain tank, store in dry location, cover unit.

CAUTION! Use only Ariens-approved parts and fluids. Improper maintenance voids warranty.

Engine Service

• Oil Change: Use SAE 5W-30 synthetic blend. Capacity: 20 oz.
• Spark Plug: Champion RC12YC, gap 0.030 inches.
• Air Filter: Replace when dirty; clean foam pre-filter with soapy water.
• Fuel Filter: Inline type; replace annually.
• Carburetor Adjustment: Idle speed: 1750 RPM; high speed: 3600 RPM.
• Valve Clearance: Intake: 0.005-0.007 in; Exhaust: 0.007-0.009 in.

Drive System

Service procedures for transmission and traction.

Drive Belt Replacement: Remove belt cover, release tensioner, install new belt (Part #215-10700).

Friction Disc: Inspect for wear; replace if thickness below 0.125 inches.

Wheel Adjustment: Adjust traction cable for proper engagement; wheels should not slip under load.

Gear Case: Check oil level annually; use 80W-90 gear oil.

Auger & Impeller Assembly

Maintenance of snow throwing components.

1. Shear Pin Replacement: Always use genuine 1/4" x 1-1/2" shear pins (Part #035-10000).
2. Auger Belt: Adjust tension to 1/4" deflection at midpoint.
3. Scraper Bar: Replace when worn to within 1/4" of housing.
4. Impeller Clearance: Adjust to 1/8" gap between impeller and housing.
5. Lubrication: Grease auger shaft bearings every 25 hours.

Tip: Never replace shear pins with standard bolts. This can cause serious damage.

Electrical System

Electric start and lighting circuit service.

1. Battery: 12V, 18Ah; maintain charge with trickle charger during storage.
2. Starter Motor: Draw current should not exceed 150 amps.
3. Key Switch: Test continuity; replace if worn.
4. Wiring Harness: Inspect for frayed wires, especially near control handles.
5. Headlight: 12V, 35W halogen bulb (Part #045-12300).

WARNING! Disconnect battery before servicing electrical components.

Controls & Adjustments

Proper setup of operator controls.

Chute Control: Cable should have 1/8" free play at handle.

Deflector: Adjust cable for full range of motion.

Traction Drive: Lever should engage completely without excessive force.

Auger Engagement: Ensure clutch engages smoothly without slipping.

Steering: Adjust skid shoes for desired clearing height.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, compression	Check fuel valve, spark plug, choke setting.
Loss of power	Clogged fuel filter, dirty air filter	Replace fuel filter, clean air filter.
Auger doesn't turn	Shear pins broken, belt loose	Replace shear pins, adjust auger belt tension.
Poor traction	Drive belt worn, friction disc worn	Replace drive belt, inspect friction disc.
Electric start fails	Dead battery, faulty solenoid	Charge/replace battery, test solenoid.
Excessive vibration	Damaged auger, loose bolts	Inspect auger blades, tighten all fasteners.

Reset: For safety interlock issues, check all control switches and connections.

Parts Diagrams

Reference diagrams for major assemblies (available in full manual PDF).

• Engine Assembly (Page 12)
• Auger Housing Group (Page 15)
• Drive Transmission (Page 18)
• Control Panel (Page 21)
• Electrical Schematic (Page 24)

Note: Always use Ariens genuine parts for optimal performance and warranty coverage.

Warranty & Support

Ariens Limited Warranty: 3-year limited warranty for residential use. Proof of purchase required.

For technical support, contact Ariens Customer Service at 1-800-678-5443 or visit www.ariens.com.

When ordering parts, provide model number (921063) and serial number (located on frame near engine).

Service Centers: Locate authorized service dealers through the Ariens website.