| The addition of 24 Volt trim will greatly increase your trim speed for that critical hole-shot advantage. I've seen several wired in ways that did not provide any short-circuit protection for when the driver accidentally presses both the 12 Volt and 24 Volt UP buttons at the same time. The worst-case scenario's include:
1. One solenoid welds itself closed and forces the motor into full trailer tilt with subsequent damage to boat and motor cover.
2. Battery cables may overheat and catch fire (not a good thing by the way)
3. One or both batteries may explode spraying acid inside the boat (also, not a good thing).
This circuit will prevent both UP buttons from activating their respective trim solenoids simultaneously.
Questions? Contact Bob Peloquin.
Note: This diagram is for the old-style 2-winding trim motors, not the 97 and newer Merc/Mariner single-winding system which uses 2 heavy duty relays instead of the solenoids shown here. While it is possible to wire the new-type trim motor for 24 volts, heavier-duty relays would have to be found to replace the stock units.
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