New Teleflex tachometer problem...need help

[BonairII]

I just installed a Teleflex tach. I connected the wires and then test started the motor. The tach worked fine and showed motor idling at around 1000-1100 rom.
I disconnected the wires to route the wires behind the helm etc and reattached the wires.....now the tach won't "zero out". The needle stays on about the 800rpm mark. I checked to make sure wires are on the correct posts...and they are.

I test fired the motor again. The needle starts to drop below the 800rpm as I'm cranking the motor and the motor starts firing...then goes up as the actual rpms are going up.

Aside from the "not zeroing out" thing, The tach "seems" to be accurate as the motor idles cause it was showing the same 1000-1200rpm when the tach was working the first time.

What could be causing it not to '"zero out" all of the sudden?

 

[boobie]

Re: New Teleflex tachometer problem...need help

You have some bad wires or loose conections some place. It worked fine before you moved it. Right ??

 

[BonairII]

Re: New Teleflex tachometer problem...need help

Yup...it zeroed when i first tried it. Could I have touched 2 wires together a shorted something out?

 

[bignev]

Re: New Teleflex tachometer problem...need help

i have installed the same tachometer into my boat.when i start the motor the tacho reads fine then when i turn it off it stays at the rpm as what the motor was doing.then when i turn the ignition on again it goes bact to zero until i start the motor

 

[BonairII]

Re: New Teleflex tachometer problem...need help

I called Teleflex support today. They said it was either defective or maybe it got hit with some stray voltage.

I exchanged the Tach at Bass Pro today. New tach works great. Problem solved.