Target Audience:
Owners, mechanics, and enthusiasts of the Polaris Apollo 340 snowmobile (1979-1980).
Value Proposition:
Provides essential information for maintaining and repairing a vintage snowmobile, ensuring longevity and performance.
Digital Access:
Convenient PDF download for immediate access.
Comprehensiveness:
Covers a wide range of systems and repair procedures critical for this model.
Engine Maintenance:
Ignition system, charging system, starting system, clutch system, engine components (cylinder heads, gaskets, timing belts, valve covers, oil system).
Drivetrain Suspension:
Axle assembly, axle shafts, CV boots, hubs, bearings, steering, suspension, shocks, struts.
Electrical Lighting:
Wiring harness, electrical pin connectors, relays, headlight bulbs, fog lights, tail lights, turn signals, side markers.
Body Accessories:
Body panels, trim, floor mats, consoles, door panels, seat covers, windshield, steering wheel, safety components, wiper blades, washer pumps.
Repair Procedures:
Detailed step-by-step instructions for disassembly, repair, and reassembly of all major components.
Maintenance Procedures:
Routine maintenance tasks, fluid checks and changes, component inspections.
Troubleshooting Diagnostics:
Diagnostic charts, common problems, symptom analysis, and solutions.
Depth:
Comprehensive, covering from basic maintenance and tune-ups to complete engine and drivetrain overhauls.
Engine Type:
Air-cooled two-stroke piston engine (specific displacement likely 339cc or similar, based on '340' designation).
Ignition Type:
CDI (Capacitor Discharge Ignition) is highly probable for this era.
Horsepower:
Estimated 20-30 HP, dependent on specific tune and configuration (actual figures would be in manual).
Carburetion:
Likely a single or dual carburetor setup (e.g., Mikuni, Keihin). Specific model and size would be detailed in the manual.
Oil Mix:
Two-stroke oil mixed with gasoline at a specified ratio (e.g., 40:1, 50:1). Exact ratio provided in manual.
Drive System:
CVT (Continuously Variable Transmission) with a primary and secondary clutch.
Clutch Service:
Manual covers clutch inspection, adjustment, replacement of weights, springs, and belts.
Belt Drive:
Primary drive via a V-belt connecting engine to driven clutch.
Length:
Specific dimensions would be in the manual, typically around 90-110 inches for this era.
Width:
Specific dimensions would be in the manual, typically around 35-45 inches.
Dry Weight:
Estimated 350-450 lbs (dry), actual specified in manual.
Track Width:
Standard snowmobile track width, specific dimensions in manual.
Braking System:
Likely a mechanical disc or drum brake system, detailed in the manual for maintenance and adjustment.
Throttle Control:
Handlebar-mounted thumb throttle with safety features like throttle lock or return spring.
Lighting System:
Headlight, taillight, and possibly brakelight for visibility. Bulb types specified in manual.
Kill Switch:
Emergency engine shut-off switch, typically handlebar-mounted.
Tune Up:
Recommended annual or every 100 hours of operation. Specific intervals for spark plug, fuel filter, and belt checks detailed in the manual.
Clutch Inspection:
Recommended after initial break-in and periodically thereafter. Manual will specify frequency.
Coolant:
N/A (Air-cooled engine)
Gearbox Oil:
Specific gear oil type and capacity for the drive chain case or final drive, detailed in the manual.
Ignition Coil Failure:
Common in older ignition systems; manual provides replacement procedures.
Clutch Belt Wear:
Normal wear item; manual details inspection for cracks, fraying, and proper tension.
Carburetor Cleaning:
Periodic cleaning and adjustment needed due to fuel deposits; manual provides detailed instructions.
Spark Plugs:
NGK or equivalent spark plug type (e.g., BR8HS or similar), specific part number in manual.
Drive Belt:
Specific V-belt part number for the CVT system, critical for proper engagement and power transfer. Found in manual or parts catalog.
Polaris Legacy:
Polaris is a long-standing American manufacturer known for its snowmobiles, ATVs, and powersports vehicles.
Apollo Lineage:
The Apollo was a popular line of Polaris snowmobiles in the late 1970s and early 1980s, known for their reliability and performance in their class.
Manufacturing Era:
Produced during a period of significant innovation and competition in the snowmobile industry.
