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Quick Specs


This fully potted, weatherproof module can be wired to ground / kill switch terminal magneto ignition systems to provide a conventional 12V square wave signal which can be utilized by AutoMeter tachometers and RPM activated devices.
Feature Points
  • Measures 1.5" x 3" x 1"
  • Environmentally sealed and vibration resistant for underhood mounting
  • For use with modern, external coil magnetos running suppression style spark plug wires.
California Residents: Prop 65 WARNING prop65 Cancer, Birth Defects and Reproductive Harm


Rated 5 out of 5 by from vertex magneto this is being used with a vertex magneto with an external coil. so far it has worked perfect. will know more when racing season resumes.
Date published: 2022-11-04
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hi i cant get hold of your tech team do you have a email address for them

Asked by: wogboy
You can reach out tech support team at [email protected]
Answered by: Alex at AutoMeter
Date published: 2023-05-23

Hi can you advise what tachometer and signal box will work with a vertex oac internal coil magneto for a race boat with a old school 454 Chev motor thanks rob

Asked by: Wogboy
Hi There, I would call our tech team. We would have some additional questions as to the specs for your boat, and then line up some options if there are any.
Answered by: Thomas From AutoMeter
Date published: 2023-05-18

I have a VORTEX magneto will this signal converter work on all autometer tacho I see some people ask about the coil dont know which one i have and no one can tell me if it will work

Asked by: Barky
I would contact our tech team and let them know more information on the Magneto that you have.
Answered by: Thomas From AutoMeter
Date published: 2023-05-18

Will this adapter work with a Styles internal coil magneto, this mag has only one ground wire coming out of it

Asked by: Chuck$Y
Unfortunately the 9118 will not work in your application. It is only designed for use on modern external coil magnetos.
Answered by: Alex at AutoMeter
Date published: 2022-11-10

Should this work with a Cirello Franenstien Mag

Asked by: Rat1089
If this is an external mag, like a super mag, then yes. If this is an internal mag, shoot us an email for more information.
Answered by: Thomas From AutoMeter
Date published: 2022-04-14

Can this converter be used to power an Airguide #1023 tach, on my 1960 Mercury Merc 400 magneto engine?

Asked by: Tripacer4
We couldn’t say for sure, but it’s highly unlikely. Our magneto signal converter is specifically designed to operate one of our tachometers on an external coil magneto race ignition, like a Mallory Super Mag or Vertex OXC Mag.
Answered by: Sarah from AutoMeter
Date published: 2021-12-21

Im using a msd pro mag 44 with a crank trigger, can i use the 9118 signal converter and a 6811 tach with this msd pro mag 44??

Thank you for contacting us. Yes, the 9118 will allow you to use a standard 6811 on a ProMag.
Answered by: Sarah from AutoMeter
Date published: 2021-09-29

will this work with a french grimes magneto with external coil?

Asked by: Casual Carl
Thank you for your question. We would need more information to know if this would work. Please give our tech line a call at 866-248-6357.
Answered by: Natalia from AutoMeter
Date published: 2021-02-18
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