Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hello, can you supply the model and serial numbers from the sticker so I can identify your machine and engine.
The best I can do is send you the shop manual for the engine. It can explain better than I could and has pictures to help. It's the 752Z265-SUA 179cc engine. Tis manual covers several, try to identify yours.http://1drv.ms/1vHirwB
I wouldn't use a drill bit. Try a wire (bared bread twister). Unscrew the main jet and shake or push out the nozzle and poke each hole.
You need a very fine wire to insert in it. Also, there should be a thin o ring on it too.Insert the carb cleaner nozzle through the opening left side of choke to be sure it comes out into the "Pilot Jet" cavity and then down the center of the cavity so it squirts into the nozzle area.
Here is a diagram from a Honda engine that the Other manufacturers copied from. See pilot jet in top right corner.
There is a hole on the bottom and a very fine wire would be needed. Try a can of carb cleaner that has a nozzle and place the cleaner nozzle on the tip.I had a friend give me some surgical wire that fits.