You can make one out of about 25' of clear plastic tubing with about 2' of automatic transmission fluid in it and a yardstick. Works great. Find the middle of the tubing, put that on bottom end of vertical yardstick, tape tubing to yardstick, fill about a third of the way up with ATF, let it settle, hook ends to carb ports. If too much out of balance, be ready to hit kill switch before ATF gets sucked in.
