Hobbs Meter in C-172

[TomG628]

Before my first flight the Hobbs showed all 0s and 1/10.
After a 20 minute flight it showed 7 a d 1/10. Is It supposed to be accurate? Otherwise the flight went fine. Thanks, Tom

[Fedex B17Pilot]

should be pretty close adding in engine startup taxi and runup, 1/10 of an hour is 6 min.

[TomG628]

Doesn't 7, 1/10 mean 7 hours and 1/10? Thanks. Tom