Machines & pumps · Hands-on test
Predator 670 V-Twin (on our rig)
22 HP of cheap, reliable muscle. The engine on our pump rig has been a workhorse, with the caveat that it needs normal small-engine maintenance.
The Predator 670 is Harbor Freight's 670cc V-twin, rated 22 HP. Ours drives the pump on our trailer. Compared with the Honda GX690 it is a direct replacement for, it costs a fraction of the price — and it starts, runs, and pulls a load all day.
What we notice in real use: it has the torque to spin a high-flow pump without bogging, the V-twin layout is smoother and sounds calmer than a single-cylinder, and electric start makes cold mornings easy. The cast-iron cylinder is a genuine plus for a machine that works in Florida heat.
Honest caveats: it is a budget engine, so keep up with oil changes, air filter, and fresh 87+ octane fuel — skip that and you will have the same trouble you would with any small engine. It is rated to run at working RPM for long stretches; respect the governor and do not over-rev it.
Hands-on entry: this engine is on our rig, used on real jobs. No invented score — just the plain read on how it performs and what it asks of you in return.
On our rig
Manufacturer specifications for the unit we run — not a test score.
- Type
- V-twin, 4-stroke, horizontal shaft
- Displacement
- 670cc
- Horsepower
- 22 HP
- Max speed
- 4,000 RPM
- Torque
- 45 Nm @ 2,500 RPM
- Start
- Electric
- Fuel
- 87+ octane unleaded
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