Common issues and how to address them
Below is a collection of the most frequent symptoms found on Marsili systems, with the possible causes and recommended actions. If the issue persists, please contact technical support.
Probable restriction in the line between the helm pump and the cylinder.
Make sure there are no bottlenecks along the tubing. Ensure fittings and bleeders have free oil passages.
Probable presence of air in the system or emulsified oil; leakage from bleeders.
Review the filling instructions and tighten the bleeder screws.
1) Hexagonal adjusting nut on engine sleeve over-tightened (outboard systems).
2) Restriction between tubing and fittings.
3) Rudder stock seized.
4) Mechanical seizure.
1) Disconnect cylinder from engine arm; if wheel turns smoothly, loosen the nut.
2) Check oil passage.
3) Disconnect cylinder from tiller arm; rudder should move freely with boat stationary.
4) Verify there is no mechanical seizure.
1) Steering wheel diameter too small.
2) Incorrect trim tab setting.
3) Oil too dense.
4) Cylinder seals worn or damaged.
1) Install a larger diameter wheel.
2) Adjust trim tabs.
3) Check the prescribed oil type.
4) Inspect cylinder rod and order a seal kit.
Cylinder seals worn or damaged.
Inspect cylinder rod and order a seal kit. If the rod is damaged, replace it together with the new seals.
1) Air in the system.
2) Cylinder in by-pass.
3) Internal leakage between cylinder chambers (test: close pump outlets — wheel must not turn).
1) Fill the system as per instructions.
2) Close the by-pass valve.
3) Order a new seal kit and — if needed — a new rod.
No oil or insufficient oil in the pump.
Check the oil level and refill if low.
Tubing connection error.
Invert the delivery line tubing.
1) Incorrect installation of rudder angle transmitter.
2) Incorrect cylinder installation.
3) Hydraulic block.
4) Mechanical block.
1) Verify the transmitter installation.
2) At 0° rudder, the cylinder must be at half stroke.
3) Check one side is not obstructed.
4) Verify no mechanical blocks and free cylinder movement.
Refer to the previous section (Type A) for manual-pump issues first.
Once manual-pump issues are excluded, inspect the electric power pack.
No power supply, blown fuse, faulty contactor, tripped thermal, or control board issue.
Check power supply, fuses, contactors, thermal relays and control board.
Control valve solenoid not energised; check valve stuck; air in the circuit.
Verify solenoid power supply; disassemble and clean the check valve; bleed the circuit.
Line voltage below nominal; overload from circuit restriction; oil too dense.
Measure actual voltage; check tubing; use the prescribed oil viscosity.
Feedback sensor out of calibration, internal oil leak, control board issue.
Recalibrate the feedback sensor per manual; check feed-back cylinder seals; inspect the board.
Control gain too high; response time too short; residual air-lock.
Reduce the gain; increase damping time; bleed the system again.
Communication issue between autopilot and power pack; wrong rudder-angle signal; autopilot settings.
Check cables and connections; verify the feedback signal at the autopilot; consult the autopilot manual for calibration.