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  1. #1

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    Install a Tachometer on a TR-1 Superjet

    I need to monitor the RPM for tuning, is there any ways to install a tach on the TR-1 motor? I have a TinyTach for my 2 stroke SJ but don't think I can just wrap it around one of the spark plug harness.
    Thanks in advance.

  2. #2
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by jetskidude1113 View Post
    … install a tach on the TR-1 motor?

    I have a TinyTach for my 2 stroke SJ but don't think I can just wrap it around one of the spark plug harness.
    .
    Why not?

    The engine revolutions per 4-stroke spark firing will be twice what it is on the 2-stroke, so change the TinyTach setting to 1 pulse per two revolutions.

    A few sense wire turns around the ignition coil base should provide enough signal.

    Or wrap the tach sensor wire around the single wire that delivers the pulse to the primary side of the ignition coil. Not both harness wires going to the ignition coil, just the one.

  3. #3

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    excellent.. I got the settings set, but do you know which color wire delivers the pulse? or I can try to see if I can fit it sense wire in and around the ign coil stem.

  4. #4

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    just found a bunch of post regarding this topic. Thanks GH


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