For optimal performance the Backwater Surface Tracer TM cavitation plate is designed to be tuned to run level at the surface of the water.

If your motor is diving too deep place the shim under the cavitation plate as shown to raise the FRONT end of the plate up.

If your motor is jumping out of the water place the shim under the cavitation plate as shown to raise the BACK end of the plate up.

NOTE:
Multiple shims may be required to
achieve optimum running angle.