check it right full, and then [carrying a gas can with ya] go until it runs out to see where the gauge is - then bend the float arm until you get a close match to reality - that's about as "calibrated" as these ol things get wink

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics