Erratic Rev counter readout

["John" <john_geuley@xxxx>]

Hi,

I have recently noticed that my rev counter is acting
erratically..

Whilst in tickover it goes from 1 thousand up to 3.5 and back down
etc etc...

Has anyone had this same issue ?

(I have a spare rev counter, but am not sure if the problem
is likely to be a sender unit ?? not sure what/where this is)

Cheers

John G.