I have a 1983 Bayliner Contessa 2750, engine is a Volvo Penta AQ260, the drive is a SP 280 with electomechanical tilt. My question is what holds the black electric box with the relays and limit switch down on the aluminum shaft housing? I have studied the parts fiche diagrams and don't see what I am missing. I machined an aluminum C shaped braked to sit under the collar and bolted it through the electric box's original inner two holes and it was a great fit. After i secured the box there is a problem with the limit switch. If i loosed the box to disengage the switch then it goes up and down with no problems. I have the OEM v/p manual and the sealock version, I've studied the trouble shooting flow charts and wiring diagrams, swapped relays and no avail. Did I create my own problem clamping the electric box down? thanks for ya'll help. I've been reading here for about 2 years, finally had to join to post. andy