Question about Craftsman Arnold Mtd Snow Thrower Blower Light Easy Mount
Model No. 247.88780, bought in Jan. 18'2011, it will run at choke then once I start to slide the lever to run, engine dies out (very sensitive). I have cleaned and open the carburetor, seems that it runs out of fuel or air cutting the engine off. Do I need just buy a complete carburetor. assembly and change everything or open it again soak it in cleaner over night?
Posted by Anonymous on
A complete replacement carburetor will just buy you another set of parts identical to the ones you already have. Nothing is worn out.
You should be able to clean the carburetor inside with SPRAY carburetor & fuel injector cleaner, after opening it up. Spray the cleaner through the jet and every passage you can find. Be careful about your eyes - some passages lead back toward your face, and carburetor cleaner is NO good for your eyes!
When it's clean, examine it to be absolutely sure everything's assembled correctly, especially the float valve ("needle and seat"). Put it back together and reinstall it on the engine.
Put a little FRESH gasoline (NEVER use old gasoline in an engine!) in the tank.
Now take off the fuel line (from the carburetor) and make sure fuel drains from it freely. Put it back on immediately and loosen the bowl. Fuel should also drain from the bowl freely.
Last, doublecheck your idle mix adjustment screw. If you toyed with it, you have to get it adjusted correctly again - a good starting point is SNUG (never TIGHT), then back it out counterclockwise about 1-1/2 turns. Once you get the engine started and running without the choke, it (the screw) should be adjusted until it's very slightly rich (counterclockwise) from the point where idle speed drops if you turn it clockwise any further. Said another way... get it idling without the choke, then turn that screw in (clockwise) 1/4-turn at a time until you can hear the idle speed drop. At that point, back it out (counterclockwise) about 1/4 turn.
If you CAN'T get it to idle without the choke, then just try backing out (counterclockwise) that screw 1/4-turn at a time. Each 1/4-turn should make it run just a little richer, necessitating less choke.
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Posted on Jan 02, 2017
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