I have a 1999 walker with a 16hp kohler engine and a while back a dealer who i have never delt with was trying to get me to do more business and said he could work on walkers and i was having problems with the carb on my walker. Anyway he said he fixed the carb but 2 days later it started doing the same thing so i took it back and he was like what do you want me to do after i had already paid 50 bucks needless to say i have learned my lesson and alwayse take my walker to the walker dealer who i use exclusively now. After they worked on my mower (the other guy) my valve covers started leaking and i do not know why. I cant understand why since the only messed with the carb? Any ideas? I have herd this may be a common problem among the walker 16hp engines i just find it intersting that it just started doing this right after they worked on it.