Raymarine forum

I have a 39' Ocean Alexander with an older Robertson RPU100 pilot in working order. I have upgraded the nav gear to an a-series MFD and would like to upgrade the pilot to an Evolution unit to replace the older Robertson.

I would like to use the existing pump from the Robertson unit since it is currently installed and working fine. Per the specs, it is a 12v motor with am ax capacity of 67 cu in/min at 7 bar. Max output power to the pump is 50w; average 10-20w. Would an ACU-200, EV-1, and p70R be a suitable source to drive/control this pump?

Welcome to the Raymarine Forum zelatore,

Thanks for providing information concerning the currently installed hydraulic pump.
What it the cubic capacity of the vessel's steering ram?

The cylinder is a Capilano BA175-7; 13.7 cu in.

zelatore,

Given the specs provided provided (bordering the upper range for a Raymarine Type 1 pump and lower range of a Type 2 pump) and that the third party pump is older, it would be recommended that an ACU-400 be installed rather than ACU-200. Doing so would avoid drawing too much current from the ACU-200 (as may occur when operating in weather / seas) via the older pump and avoid possible damage to the ACU-200. Alternatively, you may want to consider replacing the currently installed pump with a Type 1 pump.