OTOH I got a used Lawn Boy self- propelled 10 years ago. Its been to the shop once for the drive mechanisms, I had it clogged with too much grass/dirt. At best the only 'maintenance' I do is change the spark plug every once in a while, and put in gas. The other lawn boy I have, has to be 30 yrs old, 2 cycle, usually starts on the second pull, again all I do is change the spark plug. I think last year the first time I started it, there was an issue, but a little Sea Foam got it going (along with the new spark plug). whoops almost forgot, knock on wood.