Counter Balanced Spinner Instructions
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Caution: Incorrect installation of the counter balanced spinner backplate will cause increased engine vibration. Please read these carefully.

  1. Push the engine to bottom dead center and hold it in place using the hold down tool, or with a soft rod.
  2. The backplate has two holes in the face. Hold the backplate toward you, looking at the knurled side. Note that the holes are at 12:00 and 4:00. Align the 12:00 hole with the head of the engine (top dead center) while still holding the engine at bottom dead center.
  3. Use the other hole to align your propeller. This will take a bit of practice, but it works.
  4. The other hole, should you decide to use it, is the same as the Nelson notch.
  5. Grow another hand.

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© Jett Engineering, Inc. January 2000