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Message: <blockquote data-quote="tima" data-source="post: 9398" data-attributes="member: 880"><p>Thanks for the reply. I have rebuilt the regulator and adjusted it at 12 lbs as per factory specs. The manual shows setting these with 75lbs inlet pressure and 12lbs out. Before i rebuilt it , it would start out at 12lbs and then creep up to 28lbs. The diaphram and metering needle was shot. The vaporizer on a VH4D wisconsin is heated with cooling air from the engine. When i rebuilt the regulator it was pretty nasty inside. Had to soak it in carb cleaner for 3 hours so i can only imagine what might be in the carb. I would guess to say that the demand diaphram or orfice on the end of the carb is probably all dried up and not functioning properly with engine vacuum. When i choke it this would cause more manifold vacuum at the carb diaphram and thus a stronger charge of propane for starting. When it acts up it is still very hard to start even with the choke. The lockoff valve is operating properly and i changed the bronze filter inside. I have a carb kit on the way and will let yall know what happens. As i said engine runs like a champ under all loads , just tempermental in starting. Got to get it reliable for when the snow falls. After 1800.00 initial purchase and about 800.00 in repair parts i think i will have a pretty good machine. Tim</p></blockquote><p></p>