They refill using a small butane tank. Like the ones used for a refillable butane lighter. Not sure how long it will run on a fill but I haven't refilled yet. I used it again yesterday on several more connectors. Decided while I had all the harnesses out I would add a wire in the engine harness for the electric choke.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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