My service manual for the C172, 1969 through 1976 models,
indicates in the electrical load anaylsis tables that the clock is
negligible. The smallest load listed in the table is 0.33 amps
so the clock is smaller than that. The manual does not provide
the fuse size as far as I can tell.

My guess would be 1/4 amp for the fuse.


"Mark Martindale" wrote in message
...
Does anyone know what size fuse is used in the clock circuit in a 172H.
This fuse is located in a holder by the battery box. POH only shows fuse
and no ampere rating. I would guess 1 or 2 amp??

Thanks,
Mark