The lift has no power. It takes about 60 feet to come up to speed and sometimes won't even roll over a one inch metal plate. I've replaced the propane regulator and it got its power back for a few days and then went back into limp mode. I have bleed the air out of the regulator where coolant from the rdiator passes through and still no change. Spark plugs and wires are fairly new vaporizer is clean. What's next.
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