I have debated for a while installing a relay to make the Walbro get full power all the time.
Only because the Walbro is not designed to run at different voltages. Sure any 12vdc electrical motor will operate at about 5-6 volts. Even many 110v motors will operate at less voltage (just hook them up to a light dimmer and watch). But I am hearing that the failures associated to Walbros (fewer than the rumors portray) are most likely due to feeding them low voltage and causing the motors to overheat and fail.
Rao, any thoughts (honestly, not sarcasm).