Tach for Johnson

I have a 98' Johnson 115 spl. My tach. would work then cut out then work then cut out. Now it doesn’t show any signs of life. Where do I start to look to trouble shoot or is this a problem that may be perm.???





Sounds like a bad tach or just a bad wire or connection. Check all the wires one at a time with an ohm meter. If you find an open circuit I'd say that was your problem. If that doesn't fix it then try a different tach. 




Please submit whatever questions you have to IHRTechTalk@yahoo.com.  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Mark C.


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