I have a strange problem - I have a 19.5hp opposed twin I/C on a Craftsman LT1000 that used to run great. I had busted up the hood, and took it off, and then when mowing up against a bush, I cracked the flange that holds the carburetor on the fuel manifold. I had a spare 18hp opposed twin that I bought to fix up, so I stool the manifold off of that. The cracked manifold was silvery cast metal, but the 18hp had a shiny black painted manifold. The manifold fit fine, and the engine started up fine. After about 30 minutes of cutting, it stalled out, and when I looked, the manifold was covered in condensation was quite cool to the touch - I wondered the fuel was evaporating in the manifold, and I was getting some kind of vapor lock keep fuel mist from getting the engine. I tried insulating the manifold with aluminum foil, and that didn't seem to help much. Then I tried insulating the two exhaust pipes and muffler. and I am still getting stalling after 30 minutes of cutting, and the manifold is always dripping with condensation. I don't ever remember that happening before I changed the manifolds. Any thoughts on what's causing either the condensation or the engine to die out after a short cutting time. It restarts easily, and usually will run for 10 or 15 minutes before dying out again.
Thanks,
Dave
Thanks,
Dave