I recently bought a coople of used planes and parts and with it came a fairly ne looking KDS 46. The problem is the mount where the carb goes has a couple tiny cracks so the carb tighten in there securley. Can the cracks be fixed if so how? I also got and extra K & B .61 This doesn't look as new, in fact it had silicon caulking around the carb and many of the fittings. I cleaned this one up and got it running. After I got it started I would take off the glow plug and it would die. I then left the glow plug and for about thirty seconds and throttled it up and then took it off and it ran for a couple of minutes and then died. It didn't seem to leak at any of the fittings. I don't know what this caulking was for. Is this motor okay, or junk? by the way I have never flown a airplane before so all of this is new.
Thanks
Scott.