I grooved this generator some time back and tested it under a "light" load (really).


Test parameters, 600watt load (electric oil heater), 75watt bulb and the electric clock.

Set the clock at 12:00:00, turned everything on and started the generator.

I did this twice, first time there was no effect,seemed like it was running pre-groove.
Pulled the carb off and checked the groove.
Ran the bit through the groove to make sure I got all of it at the correct depth and the full 4 to 8 smile.

Popped a small hole, which was easy to fill.

Second run, 16oz of fuel. Run time : 43 minutes

1 gallon is 128oz or 16x8.

43 minutes X 8 = 344 minutes or 5.733 hours on 1 gallon of fuel

With a 4 gallon tank that calculates out to 22.933 hours of run time.














Karl Fortner
Tacoma, Wa.
Gadgetman Tacoma

Karl,
I like the way you did the test.
Craig

Thanks Craig,

It isn't easy to find an electric clock these days, and I figured that was the easiest and best way to determine the run time without being there for the finish.

Karl

You can still use a battery powered clock. Plug a 3v DC transformer (or what ever battery arrangement the clock needs) into the generator. You can find these little transformers at garage sales, and Radio Shack makes selectable a transformer. The plug end of the wire transformer needs to be cut off and striped to bare wire. Connect this to the clock's battery terminals, observing polarity. When the generator runs out of gas, the "batteries" will die also and stop the clock at your time measurement.

Dan Grieve
South-Central Missouri

That was an option I had considered but my mind was set on the real thing.

... some things just aren't the same

Karl Fortner
Tacoma, Wa.
Gadgetman Tacoma

Hi Karl,
Clever testing idea.

So what was the pre-groove and what was the post-groove on your generator? Any gains in efficiency?