There are two relays, one up and one down. Usually those are Sky brand and they can fail with corrosion. We’ve never seen two fail. This is not the same pump assembly as a SeaStar plate made today. This gets real complicated as the year models aren’t documented and there are a lot of different assemblies, even with Detwiler. The ones with the potentiometer were frequently failure issues in that assembly alone.
There are several generations of actual Detwiler plates. Tim Detwiler <1> eventually had a solid and silent financial partner, who got out of his personal business (baby goods), retired and forced a sale. It went to another owner <2> who partnered with Mercury Parts division for some distribution, he redesigned a lower performing and less durable plate, and they (Mercury) supplied him the 125 power trim assembly. He sold the company to Teleflex <3>, which is today Dometic Company after another 2 corporate sales, and they branded the plate SeaStar. That plate used a couple of designs within SeaStar labeling. Hence they used several different parts over the SeaStar companies designs also.
We really like the SeaStar plate they have designed today. It’s very robust, simple to work around and it has the Smart stick feature that is a very good system for preset engine heights and it prevents both over-trimming and excess engine heights. The ability to step by 1/4” with a bump of the switch is really good for most users who honestly just hold the buttons down too long trying to gain performance, and lose performance.
Hope this helps.
BCB
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