Tachometer not playing ball - TMD22


David Cummane
 

The needle on the tacho for my Volvo Penta TMD22 goes to the far side of the dial on turning the key but does not return to zero/rev count.

Periodically the needle shows a rev count after the engine has been running for some time.

Behind the panel there are two black wires connected to a female pin which looks like it should be attached to a male pin, however there are no obvious male pins available.  Picture below.

Has anyone had a similar problem or can anyone shed some light?

Many thanks

David Cummane
Ker Marie, SM#101 

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