I've got a Toro Z4220 Model 74363 42" 21 hp Kohler. Was mowing and suddenly stopped moving forward. Engine and blades still turning. Won't move under power in any direction. Was able to release both bypasses and move it by hand, reengaged, but still no motion. The manual says traction belts are worn, loose or off the pulleys. Is there anything I can do to get this going short of taking it to the dealer

SOURCE: I need to find out what the voltage output and the

You should have around 13.1 volts at the battery as the engine runs. If its 12 volts or lower - check or replace the voltage regulator. To check the regulator, stop engine, remove regulator plug, get a ohm meter and put the black lead to any ground,and touch the red lead to all the terminals one by one on the voltage regulator - you should get 3 readings - one lower than the other. If you dont get any readings - the regulator is definitely bad

Don in Baltimore

Marc Buck

• 36 Answers
• Posted on Apr 17, 2009

SOURCE: Swisher lawnmower wont mow

Yes It would. The belt doesn't just wear it slackens also. It will probably turn the blades when not under load but as soon at it attempts to cut grass there is not enough grip.
Replace the belts first and it should be fine.

Regards

Marc

SOURCE: need help installing drive belt on lawn

look at the back and see if there is a lever.
it might solve your problem.

SOURCE: once engaged and start mowing, you can mow for

I have the same problem with mine and its not the air filter. I have a new filter and cleaned it and still does it. I even took the air filter off and it still does it.

SOURCE: I have a kawasaki 21 hp on a 2008 toro O turn

Find a different dealer...The problem doesn't have a "101" type of solution. Being able to fix the problem requires knowing what you're looking at and recognizing what's out of adjustment. There isn't a "base line" to start at. A few shop tools are needed. Especially a tachometer. A rack type assembly under the carburetor, where the cables attach, can be moved as a whole unit to adjust how the springs effect the governor, which in turn, changes how the governor controls the carburetor. Yours is set too low, with too much tension, and the springs are too tight.
Find a better dealer...