Harbor Freight Tools


3 HP (79cc) OHV Horizontal Shaft Gas Engine, EPA

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Replacement for 3 HP Engines

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This Predator 79cc gas engine is the ideal all-purpose replacement for 3 HP engines. The construction and engineering on this unit have been upgraded for improved durability and service life so your equipment runs longer. This tough gas engine features a durable cast iron cylinder that withstands wear and abuse, fuel shut off for safe transport and gas saving overhead valves for a cooler, cleaner performance. The horizontal shaft design makes this an ideal all-purpose replacement gas engine.

  • Upgraded engineering and construction for improved lifespan
  • Durable cast iron cylinder withstands wear and abuse
  • User-friendly controls for easy starting and operation
  • Fuel shut off for safe transport
  • Ball bearing support shaft for long life
  • For use on: tillers, blowers, vacuums, water pumps, generators
  • Recoil start
  • EPA

Replacement Parts in Stock

Call to Order: 1-800-444-3353

View Available Parts

Important Information

  • Item for sale outside California only. This item can only be shipped within the 48 contiguous states via Standard Ground Shipping. In order to return this item for a refund or replacement, all fuel must first be drained.
  • This item is subject to a 20% restocking fee

tillers, blowers, vacuums, water pumps, generators
Engine displacement (cc)
Horsepower (hp)
Speed (max)
3600 RPM
Maximum Torque
3.5 ft. lbs. @ 2500 RPM
Mounting type
Product Height
11-3/4 in.
Product Length
12-1/4 in.
Product Weight
22.00 lb.
Product Width
11-1/2 in.
Shipping Weight
26.60 lb.
Start type
Recoil start
Stroke length (in.)
37 mm
3/16 in.
Mounting pattern
102mm L x 104mm W - 61.5mm W (4 in. L x 4.9 in. W - 2.4 in. W )
Shaft length (in.)
2.4 in. (60.1mm)
Shaft rotation direction
Counter clockwise
Sound rating (dB)
104 dB
CA Residents
Warning - Prop 65 Info
Note: Specifications are approximate and subject to change

We guarantee the emissions control system on your engine will be free from defects in material and workmanship for two (2) years, provided there has been no improper maintenance, misuse, or abuse of your engine. We guarantee this product to be free from defects in materials and workmanship for 90 days from the date of purchase. Limitations apply.