Product Type:
Vintage Snowmobile Service Manual
Target Audience:
Owners of 1973 Polaris Mustang snowmobiles, enthusiasts, restoration specialists, mechanics.
Value Proposition:
Provides factory-level repair knowledge for a vintage machine, enabling owners to maintain and repair their snowmobile independently, saving on professional labor costs.
Feature 1:
Comprehensive, factory-level technical information.
Feature 2:
Detailed illustrations to assist with repairs.
Feature 3:
Searchable PDF format for quick access to information.
Feature 4:
Step-by-step repair and maintenance procedures.
Feature 5:
Focus on empowering owners to make informed maintenance decisions.
Engine:
Complete engine maintenance, overhaul, troubleshooting, and component repair.
Transmission:
Transmission overhaul, repair, and adjustment procedures.
Fuel System:
Carburetor adjustment and repair, fuel pump, fuel lines, and tank maintenance.
Ignition System:
Ignition timing, coil, spark plugs, and magneto service.
Electrical System:
Wiring diagrams, lighting, battery, stator, and accessory electrical troubleshooting.
Suspension:
Front and rear suspension inspection, adjustment, and repair.
Brakes:
Brake system inspection, adjustment, and component replacement.
Track And Drive System:
Track inspection, tension adjustment, drive sprocket maintenance.
Steering:
Handlebar and steering linkage inspection and repair.
Bodywork:
Body panel removal, installation, and minor repair procedures.
Routine Maintenance:
Oil changes, lubrication, filter replacements, spark plug service.
Troubleshooting:
Systematic diagnosis of common and uncommon issues.
Repair Procedures:
Step-by-step instructions for component repair and replacement (e.g., carburetor rebuild, transmission swap).
Disassembly Assembly:
Detailed guides for taking apart and reassembling various vehicle systems.
Special Tools:
Identification and usage of specific tools required for repairs.
Depth:
Comprehensive, covering everything from basic maintenance to complex component overhauls, as stated 'every nut and bolt'.
Diagnostic Capabilities:
Detailed guidance for identifying and resolving mechanical and electrical faults.
Rebuild Procedures:
Instructions for complete engine and transmission rebuilds.
Engine Type:
Two-stroke, fan-cooled (Specific engine model not detailed in product info, but common for Polaris of this era were Kohler or Polaris-built engines).
Engine Displacement:
Varied based on specific Mustang model/engine option (e.g., 244cc, 295cc, 335cc were common in Polaris models of this era).
Bore X Stroke:
Specific to engine variant, detailed in manual.
Cooling System:
Fan-cooled
Horsepower:
Typically in the range of 15-30 HP depending on engine size.
Torque:
Specific to engine variant, detailed in manual.
Carburetor:
Single or dual carburetor (e.g., Tillotson, Mikuni, or Keihin were common), detailed tuning and rebuild procedures available.
Fuel Type:
Pre-mix gasoline/oil
Oil Mixture Ratio:
Typically 40:1 or 50:1, specific to oil type and engine recommendations.
Ignition Type:
Magneto ignition system
Piston Rings:
Specifications for ring gap, side clearance, and installation.
Cylinder Honing:
Specifications for bore sizing and honing patterns for rebuilds.
Type:
Centrifugal clutch driving a continuously variable transmission (CVT) system or a fixed gear reduction drive.
Optional Transmission:
Not typically offered for this model year/segment.
Clutch Service:
Maintenance and adjustment of the primary and secondary clutches.
Drive Belt Replacement:
Procedure for inspecting and replacing the drive belt.
Gear Reduction:
Information on the internal gear reduction system for track drive.
Overall Length:
Specific to model, detailed in manual.
Overall Width:
Specific to model, detailed in manual.
Track Width:
Specific to track size, detailed in manual.
Dry Weight:
Typically in the 350-450 lbs range depending on engine and features.
Gross Vehicle Weight Rating:
Not specified in provided information, but implied by machine capabilities.
Safety Ratings:
Not applicable in the modern sense (no government crash test ratings for vintage snowmobiles).
Kill Switch:
Standard emergency shut-off mechanism.
Throttle Control:
Handlebar-mounted throttle with return spring.
Lighting:
Headlight and taillight for visibility.
Windscreen:
Basic wind deflection for rider comfort and safety.
Infotainment Features:
Basic instrumentation (speedometer, odometer, possibly engine temp gauge). No advanced infotainment systems typical of modern vehicles.
Driver Assistance Features:
None. Focus is on mechanical operation and rider control.
Connectivity Features:
None.
Oil Change Interval:
Check and top off pre-mix fuel regularly; internal engine oil is part of the fuel mixture.
Spark Plug Replacement:
Recommended every 50-100 hours of operation or annually. Specific spark plug types (e.g., Champion, NGK) and gap settings are detailed in the manual.
Clutch Inspection:
Inspect primary and secondary clutches for wear, damage, and proper alignment at the start of each season and periodically.
Track Tension Adjustment:
Check and adjust track tension as needed, typically every 50-100 miles or after initial break-in. Specific tension values provided in manual.
Fuel:
Unleaded gasoline with the correct octane rating as specified in the manual. High-quality 2-stroke oil required for pre-mix.
Chaincase Oil:
Specific gear oil type (e.g., SAE 30 or 80W-90 gear oil), capacity detailed in manual.
Grease Points:
Use a general-purpose lithium-based grease for lubrication points like suspension pivots and steering components. Specific grease types and intervals outlined.
Carburetor Icing:
Common issue in cold, humid conditions; manual provides diagnostic and preventative measures.
Track Sprocket Wear:
Wear on drive sprockets can lead to track slippage; manual details inspection and replacement procedures.
Engine Seizure:
Can occur due to incorrect fuel/oil mixture, lean running conditions, or overheating. Manual covers causes and repair.
Clutch Slippage:
Often caused by worn clutch buttons, springs, or belt. Manual guides on diagnosis and adjustment.
Polar Is History:
Polaris Industries, founded in 1954, became a pioneer in snowmobile manufacturing, known for innovation and performance.
Mustang Lineage:
The Mustang was a popular and enduring model for Polaris, representing a balance of performance, comfort, and reliability in its era.
Production Period:
1973 was a significant year for Polaris as they continued to refine their snowmobile designs. The Mustang model line ran for many years, with updates and variations.
Manufacturing Location:
Roseau, Minnesota, USA (Polaris's historical manufacturing hub).
