The generator air intake is via an approximately 5/8” x 3” slot at the right bottom of the air cleaner
cover. Impediment of the this intake was determined by using a Extech HD350 Pitot Tube
Anemometer to measure the pressure drop near the center of the air filter created when the
generator was operating with a 3000 watt load. An increased pressure drop would indicate the air
intake was impeded.
PVC tubing was connected to two ports of a tee fitting that was epoxied into the weep hole at the
bottom of the air cleaner cover and secured near the center of the air filter (as shown above). An additional length
of PVC tubing connected the tee to the HD350. During operation with and without the GenTent,
the pressure drop with a 3000 watt load ranged between 0.30 and 0.34 in/H2O. When
approximately 20% of the air intake slot was manually covered, the pressure drop increased to
0.70 to 0.75 in/H2O.
Intake vacuum without GenTent (left) and with GenTent (right) during operational test
In addition, throttle position was monitored by attaching a stiff wire to the throttle linkage. An
increase of throttle position would indicate that it was more difficult for the generator to obtain air
when supplying power to the same load. No appreciable difference of throttle position was
observed with or without the GenTent installed.
