New tach install problems

trooper1954

Petty Officer 3rd Class
Joined
Jun 29, 2018
Messages
76
Hi all,
Just installed a new faria tach in the boat, and followed the wiring diagram that came with it. Once installed, when the ignition is turned on the tach starts to creep up even tho there is no motor running.
Anyone any ideas as to what causes this? The tach is set on the back to the #1 position as required for a 4 cyl.
Any help would be appreciated.
Thanks
 

89retta

Senior Chief Petty Officer
Joined
Jul 18, 2010
Messages
780
Sounds normal. Does it read right when the engine is running?
 
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