Chainsaw Repair

This is the one that was the stihl edt-5 like I have.      http://www.amickssuperstore.com/OPPAMA_PET_1000_Tachometer_p/oppama%20pet-1000%20tach.htm

OPPAMA PET-1000 Tachometer

The OPPAMA PET-1000 Tachometer is a hand held pulse activated tachometer. It detects and counts electric pulses produced at the time of ignition on gasoline engines, and processes the detected signals into rpm readings according to the type of engine being monitored. This tach is capable of monitoring up to 4 different types of engines including 2 and 4 stroke engines. This tachometer comes with a 39" cable w/ clamp to connect to a plug wire for a hands free reading.
   We have been using the Oppama tach in our two cycle shop for over 20 years and we love them. They are very thin (1/2") and the refresh rate (the amount of time the tach takes to give you the rpm) is only  0.5th of a second. We are happy to be able to offer this tach at such an affordable price so you too can have this quality tool. Accurately measures within + or- 10 rpms.  Made in Japan.

      Pulse                 Engine Stroke       Engine Cylinders    RPM Range
        21:42                  2                                       1                     100-19,000
        21:42                  4                                       2                     100-19,000

       22:44                   2                                       2                     100-9,500
       22:44                   4                                       4                     100-9,500

Note: Use 21:42  for Single Cylinder Engines that fire at every revolution the flywheel spins. Some single cylinder engines have a double spark and require using the 21:42 pulse. Also look at the PET-1100 tach as it has more setting for different engines.