I picked up a 2 stroke toro 20684 at a yard sale, not running. I disassembeled carb and cleaned it with carb cleaner, put it all back together, and it will only run so long as one sprays gas into carb. Carb is getting fuel, and float and jet appear to work. Anyone got a clue? Clearly gas is not being imported into engine from carb. Compression feels fine. Do I need new carb gaskets to improve vacume? This is selfpropelled and im getting to old to push my lawn boy. Welcome all responses.

The "slop" may be either a loose blade (tighten the blade retaining bolt) or a loose/sheared woodruff key in the crank adapter that the blade bolts to (replace the 1/4" key). The crank itself wallowing around in its lower bearing support indicates bigger problems and the need to tear it down for inspection/rebuild. If you do have the Suzuki 47PZ2, you have a rare bird indeed. This was the first year of this engine series (1983) and the only year to use mechanical points triggered ignition. The following years 1984-2003, the 47P used solid state ignition, which used a small transistor mounted in the coil casing to fire the ignition ..which was prone to heat/vibration fatigue and often failed - see other threads on here & elsewhere about expensive 47P coil replacement and attempts to save them by heating them in an oven ..all thanks to that dime sized transistor that you don't have to worry about.

Usually, small engines used on lawnmowers are prevented from overspeed by an wind vane, or a sail, that is located adjacent to a spinning fan. The fan will be attached to the crankshaft, so the faster the crankshaft turns, the faster the wind blows. The vane has to be free to move, and it has to be attached to the throttle arm somehow, so that the throttle is closing, as the rpm's increase. There is always a cover or shield over the fan, and this cover will have to be removed before you can inspect the mechanism.

I finally got around to working on this mower again and took the carb off and cleaned everything out with carb cleaner and blew compressed air through all of the jets and orifices and made sure everything was clear. I put it back together and ran it with the blade disengaged and it ran great for about 30 seconds. Then it idled down for a second before speeding up uncontrollably to the point that it sounded like it was gonna blow up. I quickly reduced the throttle and engaged the blade to slow the engine down. Then I went to test it out and like before, after running for a little bit with a load on the engine, it dies. It will run as long as you want with the blade engaged and stationary, but if you try to mow with it it dies after only about 30 seconds of mowing. I also noticed that when the blade is engaged the engine speed is fine, but if you disengage the blade, it revs way up. I noticed that if I turn it off when the engine starts to rev way up, then restart it right away, it will run fine again for about 30 seconds, then rev way up again. I can repeat as many times as I want. As long as I turn it off, it will run fine upon restart, even if I do it right away. Any ideas? This post was edited by jjw2112 on Sat, May 31, 14 at 21:15