Have a Johnson 120 forge that I picked up at auction. It was set up for NG, but needed to run on propane. Called Johnson and ordered/installed the smaller orifice. Installed a 11.0 LPG regulator. The safety solenoid valve was bad, so replaced it with a “mechanical” back flow valve, it’s working fine. Run off of a 5 gal. propane tank. The forge will light, but as soon as the forced air fan hits it, even at its lowest setting, blows out the flame. Son has lit it a couple times, kinda blew up/popped. Do we put a restriction on the air blower, or did we get something else wrong? I found a replacement for the ITT safety valve, but haven’t put that on yet, but it’s real intention is to open the valve at just the right moment to ignite the gas/air mixture. My biggest concern is that he won’t be able to adjust the air/fuel mixture accordingly, or that he’ll blow his head off trying! Any suggestions/tips/etc... would be greatly appreciated. Thanks, Ross
