Posted by David Sherman on Wednesday, April 23, 2003 at 3:02PM :
In Reply to: Carb problem anyone have this happen befor? posted by Willy-N on Tuesday, April 22, 2003 at 11:30PM :
That sounds like too big of a problem to be caused by some subtle carb problem. Intermittently starving with a full bowl sure sounds to me like there's some gunk wandering around in the passages. I rebuilt the carbs on my M37 and on that sno-cat you sold me and it was like giving an old man viagra. Now you step on the gas and it goes. These old carbs are pretty simple; all the little tweaks and adjustments and auxilliaries are nice but the engine should run a lot better than your describing so long as the bowl is full and the main circuit isn't clogged.
The main thing about rebuilding a carb is not "putting a kit in", but cleaning the gunk out. You have to remove every unscrewable piece, take out every aluminum plug, get all the grease off it with your favorite cheap and dangerous solvent, THEN soak it all in real carb cleaner (like Chem-Dip), rinse it out with plenty of water and blow out all the passages. Hold every little tube and orifice up to the light to make sure you can see through it. Push a fine wire through any orifice backwards to get out dirt that won't blow out. A "carb kit" is basically a gasket set plus an accellerator pump. The main part or "rebuilding" is cleaning everything.
If it only developed the problem after you put the kit in, make sure you used gaskets that looked exactly like the old ones. Kits usually have lots of extra gaskets and some don't have holes in the same spot that other do so you might have accidentally covered some passage that's supposed to go between two parts of the carb body.
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