Tilt Limiters are available for a variety of models and are designed to help prevent cowling damage when the
splash well or other boat components have encroached into the motor area. While the switches are simple devices
themselves there are a few points about the system that you should be aware of.
• On most models, the tilt limiter switch is wired in series with the Sky Blue (Sb) wire. The Sb wire is part of the
circuit for the primary winding of the PTT relay that raises the engine. When the motor is being raised and the
limiter switch reaches its set point, the switch will open the Sb wire. This deactivates the PTT relay which will
stop the motor from tilting up any further.
• Some models use a PTT relay that does not use an internal ground for the primary winding. Instead, the
ground path for the primary side of the relay is inside the ECM. The ECM on these motors controls the
operation of the PTT relay. The limiter switch will still open the Sb wire when the motor is raised to its
• F350 models have a Tilt Limiter function built into the ECM. Tech Bulletin O2015-004 is a Service-Per-Bulletin
which requires the replacement of the ECM on some V8 models. After the procedure is completed make sure
there is adequate cowling clearance and set the limiter value in YDIS if needed.
• If you are faced with a motor that won’t tilt up, start by bypassing the limiter switch. Connect the L and the
Sb wires at the tilt limiter connection point and retest. Three-wire tilt limiter switches use a Hall-Effect sensor,
so testing the sensor itself is not possible.
Optional tilt limiter kits are available for a variety of models. Refer to the chart below using the applicable model’s
starting PID for the correct part number when a particular model has provisions for a tilt limiter kit.