I have installed a Mercruiser 350 Mag MPI engine in my boat that has a Volvo SX outdrive. Everything is working correctly, except that the engine is in Guardian Mode and is limited to 2,800 RPM. Apparently I have to install or mimic the Trim Limit Switch so that the computer will not put the engine in Guardian Mode.
My Service Manual 31 shows an accurate engine electrical diagram, but the transom shield/outdrive components are included. I have not been able to find more complete wiring information online. The diagram for the trim switch is below and should be accurate. I believe +12 VDC flows through the wires, but how that interfaces with the engine I do not understand. If someone could shed some light on this I would be most appreciative. I do know that with the drive down, there is no resistance between the wires of the Trim Limit Switch.
My Service Manual 31 shows an accurate engine electrical diagram, but the transom shield/outdrive components are included. I have not been able to find more complete wiring information online. The diagram for the trim switch is below and should be accurate. I believe +12 VDC flows through the wires, but how that interfaces with the engine I do not understand. If someone could shed some light on this I would be most appreciative. I do know that with the drive down, there is no resistance between the wires of the Trim Limit Switch.