I have a 1972 65 hp mercury with a mercruiser shifter . What is the black knob at the front bottom of the unit . I had it apart the other day and there's wires going to it. Can't find any thing on YouTube about it. Thanks
Any tips or advice before i start removing my lower unit to replace my waterpump kit,, what gear should it be in when i remove the unit ? also the shaft that locks the motor from jumping out of the water in reverse has not worked since ive owned it for 3 years is this something that can be...