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Predator 13000 Runtime Calculator

Verified Specs ✓

Estimate how long a Predator 13000 will run based on your power load and available fuel, using Harbor Freight's published specifications as the baseline.

Specifications checked against Harbor Freight-published information. GeneratorRuntime.com has not tested this generator and is not affiliated with Harbor Freight.

How long does a Predator 13000 run?

Harbor Freight publishes:

  • 12.1 hours at 50% load · gasoline, 10.7 gallons
  • 16 hours at 50% load · propane (lp), a 100 lb propane cylinder

Actual runtime varies with load and operating conditions.

Calculate Your Runtime

Choose your generator and we'll use verified published specifications as the starting point. We haven't tested these generators ourselves.

1Your generator

Predator 13000 Tri-Fuel (71386)

Verified Specs ✓

The specifications shown were checked against a manufacturer-published source. This does not mean GeneratorRuntime.com tested or endorses this generator, that the manufacturer endorses this site, or that runtime is guaranteed.

Conventional / Tri-Fuel · View model runtime guide

  • Gasoline
  • 10,000 running watts
  • 13,000 starting watts
  • 10.7 gallon tank

Published runtime:

  • 12.1 hr @ 50% load on 10.7 gal

Source: Harbor Freight owner's manual, item 71386 View source ↗

Checked 2026-09-28

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2Fuel available

Generator tank capacity: 10.7 gal

gal

Pre-filled with a full tank — change it to what you actually have, including stored cans.

3Expected load
%

Percent of running watts. 50% is a common planning figure.

Runtime11–13 hoursDetails ↓

Predator 13000 published runtime

  • Gasoline: 12.1 hours at 50% load on 10.7 gallons
  • Propane: 16 hours at 50% load on a 100 lb tank
  • Natural gas: no runtime published (continuous utility supply)

From Harbor Freight's owner's manual for item 71386 (also sold as item 70476).

Verified specifications

Manufacturer
Predator
Model
13000 Tri-Fuel
Model number
71386
Model codes
Item / 71386 / 70476
Generator type
Conventional / Tri-Fuel
Gasoline: running
10,000 watts
Gasoline: starting / max
13,000 watts
Gasoline: tank
10.7 gallons
Gasoline: published runtime
12.1 hours at 50% load on 10.7 gallons
Propane (LP): running
9,100 watts
Propane (LP): starting / max
12,000 watts
Propane (LP): published runtime
16 hours at 50% load on a 100 lb propane cylinder
Natural gas: running
7,800 watts
Natural gas: starting / max
10,000 watts
Voltage
120/240V
Displacement
458cc
Noise
78.5 dB(A) at 50% load, 23 ft
Starting system
Push-button electric start, remote start
CO safety
CO SECURE

Source: Harbor Freight owner's manual, item 71386 — View Harbor Freight Specifications ↗
Specifications verified: September 28, 2026

How much fuel does the Predator 13000 use?

  • Gasoline at 50% load: 10.7 gal ÷ 12.1 h ≈ 0.88 gallons per hour
  • Propane at 50% load: 100 lb ÷ 16 h ≈ 6.25 lb per hour

These are our calculations from Harbor Freight's published figures, not Harbor Freight figures.

Manufacturer figures vs. our estimates

Only the runtimes listed above are Harbor Freight's own published figures. When your load and fuel amount exactly match one of them, the calculator labels the result Manufacturer Published Runtime. Loads between published figures are labeled Estimated from Manufacturer Data, and loads outside the published range are labeled Extrapolated with a wider range. Those are GeneratorRuntime estimates, not Harbor Freight specifications.

Operate it safely

Like every portable generator, the Predator 13000 must be operated according to the manufacturer's safety instructions: outdoors only, well away from doors, windows, and vents, with battery CO alarms inside your home. A CO shutoff feature is not a substitute for safe placement. Never refuel while the engine is running or hot.

Predator 13000 FAQ

›How long will a Predator 13000 run on gasoline?

Harbor Freight's owner's manual lists 12.1 hours at 50% load on the full 10.7-gallon tank.

›How long will a Predator 13000 run on propane?

16 hours at 50% load on a 100 lb propane tank, according to the manual. Harbor Freight recommends a 40 lb tank minimum.

›How long will it run on natural gas?

Natural gas comes from a utility line, so there is no tank to run out. Harbor Freight does not publish a natural-gas consumption figure.

›Which Predator 13000 does this page cover?

Items 71386 / 70476, the 13,000 W tri-fuel with remote start and CO SECURE: gasoline 10,000 watts running / 13,000 watts starting, propane 9,100 watts / 12,000 watts, natural gas 7,800 watts / 10,000 watts.

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