1975 johnson evinrude snowmobile service repair manual

This service repair manual is designed for the 1975 Johnson Evinrude snowmobile models, including the alternate firing 399 35 HP, 426 40HP, 646 50HP JX, and Skimmer sleds. It provides comprehensive technical information for the maintenance and repair of these snowmobiles, making it an essential resource for both professional mechanics and DIY enthusiasts.

• Dimensions:
  • Length: 103.2 inches
  • Width: 35.4 inches
  • Height: 43.4 inches with windshield / 34.9 inches without windshield
• Engine: OMC 2-cycle Alternate Firing - 2 Cylinder
  • 399CC 35 HP at 6750 RPM
  • 436CC 40 HP at 6750 RPM
  • 646CC 50 HP at 6750 RPM
• Starter: Manual rewind
• Variable Speed Drive: Centrifugal operated sheave engages V-belt
• Overall Ratio: 4.43 to 1
• Final Drive: Silent Drive Chain
• Sprocket Ratio Standard:
  • 135 - 17:39
  • 145 - 19:39
  • 165 - 19:39
• Muffler: Tuned for maximum performance
• Brake: Caliper - Flange on secondary
• Throttle: Thumb operated
• Track: Rubber - Polyester Cords fully adjustable
  • Width: 15.5 inches
• Skis: Formed steel equipped with leaf springs and replaceable wear runners
• Seat: Vinyl coated cover, molded urethane foam cushion
• Hood: Molded fiberglass
• Headlamp: Sealed beam Westinghouse 7700
• Taillamp/Stoplamp: GE 11 5 7 Acc. ~speedometer/~achometelarm p - GE 1816
• Fuel Tank: Capacity - 5 Imperial gallons, 6 U.S. gallons
• Fuel: Gasoline - Premium or regular leaded
• Lubrication: OMC brand 50:1 lubricant
• Carburetor: TillotsonHD diaphragm type with accelerator pump
• RPM Ratings:
  • Idle: 1300 ± 200
  • Transmission belt engaging speed: 3300 ± 300
• Ignition: Breakerless magneto C.D. (Capacitor Discharge) ignition
• Spark Plug: Champion UL-77V
• Advance Sensor Coil Resistance: 17 to 19 ohms
• Retard Sensor Coil Resistance: 28 to 30 ohms
• Charge Coil Resistance (2 coils) Total: 600 ± 50 ohms

This manual is an invaluable resource for anyone working on or maintaining these specific snowmobile models.