METHOD TO OPERATE A MARINE PROPULSION SYSTEM IN A TROLLING MODE, CONTROL UNIT AND MARINE PROPULSION SYSTEM

摘要

The invention relates to a method to operate a marine propulsion system (1) in a trolling mode, wherein the marine propulsion system (1) comprises at least one propeller shaft (6) which can be driven by an engine (2) via a pressure operated forward clutch (4) in a forward direction or via a pressure operated reverse clutch (5) in a reverse direction. A forward pressure is applied to engage the forward clutch (4) to a certain extent and at the same time a reverse pressure is applied to engage the re- verse clutch (5) to a certain extent. A value of the forward pressure is different to a value of the reverse pressure, so that the propeller shaft (6) is caused to rotate. The invention further comprehends a control unit with means to operate the marine propulsion system according to said method and a marine propulsion system with such a control unit.