The power stage on the REX-1 and EZ129K systems is combined with the
Ignition Coil into one unit. Starting with the EZ115K and EZ116K systems, you should start by disconnecting the negative battery cable and disconnecting the power stage connector. Next, take the mounting bolt(s) off of the retaining bracket and the ignition coil and power stage should be removed. To install, put the coil and power stage back in place and tighten retaining bolts, plug in power stage connector and reattach negative battery cable.