Mercury Rev Counter Problem

[Shonzy]

I've got the rev counter below for my 1993 Merc 75hp 2 stroke but it will not work.
The light comes on with the igniton and the needs shows 0 revs. When i start the engine the needle stays where it is. When i stop the engine the needle moves back upto to 900 RPM so i guess it does work.
I have tried all settings on the back also.
Someone did tell me i need to put it on setting 12 but as you can see, its not there???

Thanks in advacnce
Shonzy

[Puckoon]

shonzy i sent a post under older mercury newer tach for this, check it out. you have the same problem as i have. as for setting 12, you should put it on setting 6. once i turn my engine off, my needle goes round the dial a bit too. my engine is an 80hp mercury 1988. alan

[Shonzy]

I tried 6 and nothing happened. As far as i can see my wiring seems to be the same as yours in the pic.

Arron

[Puckoon]

looks like we both need expert advice. im sure someone on here will come to our rescue.

[jones]

try this site lads,loads of info
http://www.tb-training.co.uk/cover.html

[Puckoon]

cheers jonesy, far too technical for me though.

[Shonzy]

Good site Jonesy!!

I think we have rev counters for 4 stroke engines :-/