I have a Sears model 987.799931 chipper/shredder, with engine model 143.961005. Two problems: 1) the motor is not starting. I've replaced the spark plug, oil, air filter, and fuel. The engine tried to start after I sprayed some cleaner in, but only briefly. At this point, I'm pretty sure that the problem is in the carburetor. Is this something I can repair or replace myself? Please send instructions if this is doable. 2) my recoil starter rope just broke. I have recoil starter number 590704. The rope in this particular starter is held in place by a staple rather than a knot. I can't get it out, or I'd just replace the cord. Any way around buying a whole new starter?
The carburetor for your engine does not show a rebuild kit. I am sending you some instructions we wrote for cleaning the carburetor. You might need to run the wire through the small passages several times and wash them with carburetor cleaner to get them clean.I looked up a replacement carburetor and it is part number 632242 and the cost is around $145.00. The carburetor might also be no longer available for ordering.I am assuming the staple holding the starter rope is in the handle. You should drive a small flatblade screwdriver under the staple and pry it loose. The complete starter assembly might also be no longer available for ordering.When fuel is left in the carburetor it stops up the fuel and air passages inside the carburetor. The carburetor will have to be rebuilt or replaced. To rebuild the carburetor it will have to be removed from the engine. The carburetor will have to be disassembled and cleaned with carburetor cleaner. Soft wires need to be pushed through the fuel and air passages and carburetor cleaner sprayed through the passages. The fuel and air passages then need to be blown out with compressed air. The fuel and air passages are in the side of the venturi of the carburetor. When the throttle plate is closed one edge of it will be resting on the fuel and air passages. A rebuild kit then needs to be installed and the carburetor adjusted properly. To replace the carburetor you remove the old carburetor from the engine and install the new carburetor.When you remove the carburetor from the engine, note the linkage connections. The hooks need to go back the same direction they were originally. Make notes or draw a picture.
Thanks! It started on the first pull. One question ... You said to adjust the carburetor when I was done. I haven't touched the idle mixture screw (perhaps it needs cleaning, too?) but when I reinstalled the high speed mixture screw on the bottom of the float bowl I totally guessed as to how far to screw it in. Any instructions?
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