Hi guys,

My tach reads high on initial start-up. At idle it will register as high as 3-4,000 rpm then after awhile it will settle down and read close to actual rpm.

Today it read 5,500 rpm for 10 minutes or more. I know from the sound of the motor and the speed I was traveling the motor couldn't have been reving over 3,000 rpm later it settled down to a more correct reading. After shutting down and restarting it seamed to work OK.

I have cleaned the contacts on the back of the tach to no avail.

What is the problem? Thanks in advance