HelpI tried to start my 51 VAC today after about 10 years sitting. Much to my surprise it started easily with a new battery (grounded to negative), new oil, new antifreeze. However after getting warmed up a little 3-5 minutes it shut down. Acted like it was running out of gasoline. Would immediatley restart, however, if I choked it until it started and then backed off the choke. Again run for 30 to 60 seconds and then quit. It did this over and over again, always starting up right away after dying. I loosened the carb from the intake manifold and noticed a butterfly valve that is attached to the throttle lever. I set the throttle lever such that the butterfly valve was open and re-bolted up the carb. Again it started right up After running a little while, however, the throttle lever linkage moves on its own and I think it closes the butterfly valve and then the motor dies again. Seems to be activated by vacum somehow. I adjusted the idle mixture screw and didn't seem to make much difference unless I opened it way up or closed it down completely. I suspect something with the throttle lever and the attached butterfly valve. Carbs are a black hole for me as you can probably tell. Anyone have any ideas? Also,noticed that the old battery was hooked up as a negative ground so I did the same with the new battery. Also, the generator was a Chrysler Corp. so I suspect that my father in law changed it over to a negative ground system. Is there any way to know. Seemed to run turn over the motor OK and ran OK, at least for awhile. Any tips would be appreciated. Pedro
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