If you can lean over the swim step and measure the length and width of the trim tabs you can probably also measure the diameter and length of the hydraulic ram actuator. If you have a diver clean the bottom periodically, have him do it for you. That data would help you get a model number from the mfg. The pump
and lines to the actuators are mounted on the inside of the transom and reasonably accessible. Be sure and check the fluid in the pump
. My reference point is Bennett tabs, but I assume Lenco are similar in design and operation.
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