This is a 3KW 4cycle generator with a 4 gallon tank.
Manufacturer specification under medium load is 9 hours of run time.
Having actually used this generator, I can tell you that under a light load it ran only 6 hours on 4 gallons of gasoline.
Post groove - tested this setup with 1 gallon of fuel and a load factor of 900 watts
ie; electric oil heater
the generator ran for 4 hours 17 minutes
That is 17 hours 8 minutes on 4 gallons of gasoline.
Based on the real-time usage under light load, that is a 283% improvement.
Real-time test - Live-stream event in Moses Lake on 4 gallons of fuel, ran the generator 8 hours on Saturday, 6 hours on Sunday. Load of about 400 watts still had 2 gallons of fuel in the tank.
Actual modifications made to this generator..
Gadgetman Groove to the throttle body - 4-8 o'clock groove
Adjustment of the spark plug - increase gap by 20%.
Karl Fortner
Tacoma, Wa.