Era:
Mid-1970s snowmobile market, known for performance and reliability.
Competitors:
Arctic Cat, Ski-Doo, Polaris, Rupp, Yamaha; Scorpion was a significant player in this era.
Performance Focus:
The Super Stinger was positioned as a performance-oriented model, often favored for its speed and handling capabilities.
Manual Value:
Essential for owners and mechanics to maintain and repair this vintage performance snowmobile, ensuring its longevity and optimal operation.
Systems Covered:
Engine, Fuel System, Ignition System, Drivetrain, Suspension, Steering, Brakes, Electrical System, Bodywork, Tune-up, Troubleshooting, Maintenance
Type:
Service Manual / Repair Manual
Engine Mechanical:
Detailed procedures for disassembly, inspection, repair, and reassembly of engine components including pistons, rings, connecting rods, crankshaft, cylinder head, valves, and seals.
Fuel System:
Carburetor adjustments, cleaning, and rebuilding; fuel pump operation and servicing; fuel line inspection and replacement.
Ignition System:
Magneto ignition troubleshooting, coil testing, spark plug specifications, timing adjustments, and related component checks.
Drivetrain:
Clutch adjustment and maintenance, chain drive inspection and tensioning, drive axle servicing, and driven clutch operation.
Suspension:
Front and rear suspension component inspection, lubrication, and replacement; shock absorber servicing (where applicable).
Steering:
Handlebar assembly, steering linkage inspection, lubrication, and adjustment.
Brakes:
Brake system inspection, cable adjustment, brake pad/shoe wear assessment, and hydraulic system servicing (if applicable).
Electrical:
Headlight and taillight operation, wiring harness inspection, kill switch functionality, and basic electrical troubleshooting.
Bodywork:
Body panel inspection, decal application, and seat maintenance.
Preventive Maintenance:
Scheduled maintenance tasks including lubrication points, inspection checklists, and recommended service intervals.
Troubleshooting:
Systematic diagnostic procedures for common starting, running, and performance issues, often presented in a "Problem/Cause/Solution" format.
Repair Procedures:
Step-by-step instructions for replacing and repairing specific components, often accompanied by exploded views and diagrams.
Tune Up:
Comprehensive guide to engine tune-up procedures, including carburetor synchronization, ignition timing, and general performance optimization.
Depth:
Comprehensive, covering from basic maintenance and adjustments to detailed engine rebuilds and component diagnostics.
Engine Type:
2-Stroke, Air-Cooled, Twin-Cylinder (typical for performance models of this era)
Displacement:
Typically in the 300cc to 440cc range for performance models like the Super Stinger. Specific displacement would be detailed within the manual.
Bore X Stroke:
Specific dimensions would be found in the manual; examples for this class might be around 60-70mm bore and 60-70mm stroke.
Horsepower Estimate:
Likely in the 30-50 HP range, depending on specific engine configuration (e.g., 340cc vs 440cc).
Torque Estimate:
Specific torque figures are less commonly published for this era but would correspond to the horsepower output.
Carburetor Type:
Likely dual Mikuni VM or similar performance-oriented carburetors, with specific model numbers (e.g., VM30, VM32) detailed in the manual.
Fuel Type:
Leaded gasoline (e.g., 87 octane or higher) mixed with 2-stroke oil. Oil-to-fuel ratio would be specified.
Fuel Mixture:
Standard 2-stroke oil mix (e.g., 50:1 or 40:1) as specified by Scorpion.
Type:
Variable Ratio Drive (CVT) with primary (drive) and secondary (driven) clutches.
Options:
N/A for standard models; performance tuning might involve clutch component options.
Clutch Engagement:
Specific engagement RPMs and shift characteristics would be detailed, critical for optimal performance.
Drive System:
Chain drive to the track.
Length Estimate:
Typical for the era, likely around 90-100 inches (228-254 cm).
Width Estimate:
Typically around 30-36 inches (76-91 cm) to fit standard snowmobile trails.
Dry Weight Estimate:
Likely in the range of 350-450 lbs (159-204 kg).
Track Width Estimate:
Commonly 15 inches (38 cm).
Track Length Estimate:
Typical around 100-120 inches (254-305 cm).
Crash Tests:
N/A (Snowmobiles of this era were not subject to standardized crash testing like automobiles).
Kill Switch:
Standard safety feature, often a tethered kill switch to the rider.
Braking System:
Mechanical disc or drum brake, operated by handlebar lever.
Headlight:
Standard for visibility.
Taillight Brakelight:
Standard for visibility and signaling.
Clutch Maintenance:
Regular inspection of clutch weights, springs, and sheave surfaces; cleaning and lubrication as recommended.
Engine Tune Up:
Recommended annually or after a specified number of operating hours (e.g., 100 hours) for spark plug replacement, carburetor adjustment, and ignition timing checks.
Lubrication:
Regular greasing of suspension components, steering linkage, and drive clutch spider arms.
2 Stroke Oil:
Specific API service classification or manufacturer-recommended 2-stroke oil (e.g., Yamalube, Mercury Premium 2-Stroke Oil) would be detailed. Common recommendations are for TCW-3 or API-TC rated oils.
Gearcase Oil:
Type and viscosity of gear oil for the drive chaincase (if applicable) would be specified; typically SAE 80 or 90 weight gear oil.
Clutch Wear:
Common issue for vintage snowmobiles; clutch buttons, rollers, and belt wear are critical checks.
Carburetor Gumming:
Fuel residue can cause carburetor issues if the snowmobile sits for extended periods. Regular cleaning is recommended.
Track Tension:
Proper track tension is crucial for drivetrain longevity and performance; requires periodic adjustment.
Suspension Bushings:
Wear in suspension bushings and bearings can lead to poor handling and premature component failure.
Manufacturer:
Scorpion Inc., a well-regarded snowmobile manufacturer in its time, known for innovation and performance.
Predecessors:
Scorpion produced various models leading up to the Super Stinger, focusing on performance and trail riding.
Super Stinger Role:
The Super Stinger represented a high-performance offering in Scorpion's 1975 lineup, competing with top models from other manufacturers.
Production Years:
Scorpion produced snowmobiles from the mid-1960s to the early 1980s. The Super Stinger was a specific model within that range.
