Fluctuating tachometer

jkoppen73

Cadet
Joined
Jun 20, 2018
Messages
27
at idle my tach is slowly fluctuating between 1000 and 2500 rpm, I do not hear the engine idle going up to 2500 rpm though. Any thoughts on what is causing this? Making it hard to set in gear idle....
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
42,739
Bad connection to the gauge (12V, ground or distributor), or a bad gauge. Check connections and power to the gauge. look for corrosion. Disconnect wire at the distributor and run a new wire from dizzy to gauge.
 

jkoppen73

Cadet
Joined
Jun 20, 2018
Messages
27
Should have mentioned it is on a 1986 85 h.p. force, I did make sure the contact area behind rectifier was good and clean, when it happened after that I gently tapped on the gauge glass and it went back to the normal 1000 rpm. So I will pull dash panel and check connections, and if that doesn't cure it, a call to Faria for warranty.....As soon as I can figure how to add tags I will, certainly have not seen anything anywhere in my profile that remotely refers to tags....
 
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