How do I repair the self-propel mechanism on my walk behind MTD lawn mower?
The front wheels spins when engaged but have very little power so they are not able to propel the mower. First I thought maybe the front tires were worn to the point where it did not have traction with the grass. I checked on the driveway and the wheels are not strong enough to move the mower. Any ideas for the cause of weak drive wheels? And where do I begin with the repair? I'm somewhat handy and will try before bringing it to a repair shop. The mower is 10 years old and works well otherwise. Thanks.

there are so many things that can be causing this. First of all one would want to consider the way in which this particular self-propelling action actually works (there are several types, that can have their own distinct problem). Therefore , you may want to ; 1: Investigate a little further on your own- why not?- you may just solve your prob. , or; 2; take it to a repairman who may make you wish you would have just looked a little further. Good luck!