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28 Results
28 Results 
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Featured Item
Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 5
Used Ajax 8 1/2x10 E-42 Natural Gas Engine

Used Ajax 8 1/2x10 E-42 Pumpjack Engine with following features: • 42 HP • 300-525 RPM • 1 Cylinder, 4 stroke • 216 mm (8.5 in) Bore • 254 mm (10 in) Stroke • 9.29 L (567 in3) Displacement • Weight 4,320 lbs (dry weight, engine only) • Dims

Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 5
  • 42 HP
  • 300-525 RPM
  • Stock No: 53836
42
300-525
Featured Item
Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 3
Used Ajax 8 1/2x10 E-42 Natural Gas Engine

Used Ajax 8 1/2x10 E-42 Pumpjack Engine with following features: • 42 HP • 300-525 RPM • 1 Cylinder, 4 stroke • 216 mm (8.5 in) Bore • 254 mm (10 in) Stroke • 9.29 L (567 in3) Displacement • Weight 4,320 lbs (dry weight, engine only) • Dims

Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 3
  • 42 HP
  • 300-525 RPM
  • Stock No: 53837
42
300-525
test-banner
Featured Item
Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 2
Used Ajax 8 1/2x10 E-42 Natural Gas Engine

Used Ajax 8 1/2x10 E-42 Pumpjack Engine with following features: • 42 HP • 300-525 RPM • 1 Cylinder, 4 stroke • 216 mm (8.5 in) Bore • 254 mm (10 in) Stroke • 9.29 L (567 in3) Displacement • Weight 4,320 lbs (dry weight, engine only) • Dims

Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 2
  • 42 HP
  • 300-525 RPM
  • Stock No: 53774
42
300-525
Featured Item
Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 6
Used Ajax 8 1/2x10 E-42 Natural Gas Engine

Used Ajax 8 1/2x10 E-42 Pumpjack Engine with following features: • 42 HP • 300-525 RPM • 1 Cylinder, 4 stroke • 216 mm (8.5 in) Bore • 254 mm (10 in) Stroke • 9.29 L (567 in3) Displacement • Weight 4,320 lbs (dry weight, engine only) • Dims

Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 6
  • 42 HP
  • 300-525 RPM
  • Stock No: 53775
42
300-525
Featured Item
Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 6
Used Ajax 8 1/2x10 E-42 Natural Gas Engine

Used Ajax 8 1/2x10 E-42 Pumpjack Engine with following features: • 42 HP • 300-525 RPM • 1 Cylinder, 4 stroke • 216 mm (8.5 in) Bore • 254 mm (10 in) Stroke • 9.29 L (567 in3) Displacement • Weight 4,320 lbs (dry weight, engine only) • Dims

Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 6
  • 42 HP
  • 300-525 RPM
  • Stock No: 53779
42
300-525
Featured Item
Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 1
Used Ajax 8 1/2x10 E-42 Natural Gas Engine

Used Ajax 8 1/2x10 E-42 Pumpjack Engine with following features: • 42 HP • 300-525 RPM • 1 Cylinder, 4 stroke • 216 mm (8.5 in) Bore • 254 mm (10 in) Stroke • 9.29 L (567 in3) Displacement • Weight 4,320 lbs (dry weight, engine only) • Dims

Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 1
  • 42 HP
  • 300-525 RPM
  • Stock No: 53148
42
300-525
Featured Item
Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 3
Used Ajax 8 1/2x10 E-42 Natural Gas Engine

Used Ajax 8 1/2x10 E-42 Pumpjack Engine with following features: • 42 HP • 300-525 RPM • 1 Cylinder, 4 stroke • 216 mm (8.5 in) Bore • 254 mm (10 in) Stroke • 9.29 L (567 in3) Displacement • Weight 4,320 lbs (dry weight, engine only) • Dims

Used Ajax 8 1/2x10 E-42 Natural Gas Engine
1 of 3
  • 42 HP
  • 300-525 RPM
  • Stock No: 52830
42
300-525
Featured Item
Used Superior 8 1/2x10 Natural Gas Engine
1 of 2
Used Superior 8 1/2x10 Natural Gas Engine

Used Superior 8 1/2x10 E-42 Pumpjack Engine with following features: • 42 HP • 300-525 RPM • 1 Cylinder, 4 stroke • 216 mm (8.5 in) Bore • 254 mm (10 in) Stroke • 9.29 L (567 in3) Displacement • Weight 4,320 lbs (dry weight, engine only) • Dims

Used Superior 8 1/2x10 Natural Gas Engine
1 of 2
  • 42 HP
  • 300-525 RPM
  • Stock No: 52717
42
300-525

Power Zone offers a wide range of new, used and reconditioned engines including Diesel Engines, Natural Gas Engines, Gas Engines, Propane Engines, and Hit & Miss Engines, sometimes referred to as Putt & Putt Engines or Pumpjack Engines. We provide these engines from many different manufacturers including Caterpillar, MTU, Detroit, Cummins, John Deere Ajax and Arrow. We have engines for most applications including Portable Power Units, Heavy Machinery, Fluid Pumping, Air Compression and Backup Power for the municipal, manufacturing, oil & gas, mining and agriculture sectors.