Steve Colquhoun posted a discussion

Bought in 1987, we have a Autohelm 6000Linear Type 1 with indicatingWe own a Whitby 42.. ketch rig - full keel .. shipping weight 28,000 lbsEdison Arm 1-1/2 with 3/8 keyway in the arm. The Autohelm 6000 works.But the display is cloudy and we can hardly see the numbers. Question: We bought a few displays from other cruisers and they don't seem to work properly. Is there a compatibility problem between units, even though they look the same? Question: Can we buy another display unit for our 1987 Autohelm 6000?See More