View Full Version : 28 ZX automatic trim tabs causing trouble

07-18-2013, 01:38 PM
I'm having trouble with my 28zx blowing the lines on my K-planes. When I turn the ignition off on the starboard engine both trim tab motors come on to raise the tabs. I suspect it's staying on too long because it's blowing lines. Can anyone tell me how to disable this feature?

07-24-2013, 11:38 AM
I am guessing they used the bennett auto up unit. look it up on bennett's site. however I suspect this will be only a patch to the actual problem. The lines shouldn't blow if you run the tabs too long one way or the other. Think of all the people without gauges.

Carl C
07-24-2013, 12:00 PM
Call Bennett. Their customer service is second to none.

08-21-2013, 11:27 AM
Thanks guys that's exactly the system that in the boat. The problem with that system on my boat is that the pumps have been swapped out to full size Parker trim pumps with the eddie marine tabs. Those pumps produce enough pressure to blow lines and seals when held on. Hopefully I'll be able to disable the auto up by pulling the fuse so that I can get my tabs operational again. Thank you for the help!!