Laurence Brown posted a discussion
Raymarine Autohelm
My hydraulic steering on the used 1996 Beneteau 40 cc that I recently purchased has an excessive amount of slippage in it. It has a Raymarine hydraulic autopilot attached. I sent pics to the manufacturer of the hydraulic steering (L&S) and they said the autopilot is incorrectly installed and will never work without lock valves in place between the autohelm hydraulic lines and the cylinder, to isolate the helm pump.I think I need the double pilot check valve (M81166), but also need to put a third return line in place for the helm pump steering when the autopilot is off (its a two line helm pump)Does the M81166 have a return line connection? It is unclear in the installation instructions for the Raymarine autopilot if the check valve depicted in Figure 8 is the "double pilot M81166"Can anyone advise me?See More