I have a borrowed Troy Bilt chipper. Has a 10 HP Tecumseh engine. They guy I borrowed it from said that it hasn't been run in two years. Of course, it won't start. I took the carb apart and cleaned all the grunge out of it. Really wasn't as bad as I expected. (Replaced a bunch of "shot" hoses, too.) I was able to blow through the jet, and most every other little passage, so I think it's okay. I did notice that there is one "mixture" screw that was, strangely enough, turned all the way in. It had a plastic cap on it, so I can only surmise that it's supposed to be that way. (The owner is not mechanically inclined at all, so I don't think he's messed with it.)
I'm not sure about spark. I took the plug out, connected the wire, and let it lay on top of the head. Couldn't really see a spark, but it's pretty bright outside. Is it possible to check the coil on these things? Where do you measure? It's got the lug on top of the coil to kill the ignition. I made sure the switch wasn't shorted. The plug doesn't measure shorted with a meter, although there is a good deal of carbon on it.
Posts: 38442 From: Carrollton GA. Out in the... country. Registered: Oct 1999
I'll try the mixture screw. It's supposed to be the idle mixture from the diagrams I've seen. The high speed mixture is not adjustable. I can try to prime it, but the carb is horizontal. No way to just pour anything in. Will have to come up with a spray of some sort.
Compression seems fine. When I yank the cord there's plenty of resistance. I can feel it when I pull through the compression stroke. It certainly doesn't freewheel. A good yank sounds like it provides three "strokes".
[This message has been edited by Raydar (edited 03-08-2011).]
I've taken the carb apart. The float moves freely. I can put a rubber tube up against various things and blow, and air comes out pretty much where I'd expect. If I loosen the fitting on the bottom of the bowl, gas leaks out.
Posts: 10651 From: Holland, MI Registered: Jun 2010
I had a tecumseh sno blower that needed coaxing. I put 4 or 5 drops into the cylinder and screwed the spark plug back in and got it to run for a few cycles....after about 3 tries at that it would stay lit.
Mar 9th, 2011
Posts: 10007 From: Marion Ohio Registered: Apr 2004