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    Wiring Help - Merc 500 Thunderbolt 50hp

    Hi everyone, I have two random wires that are not connected on my engine. A black wire on the port side on the bottom terminal, and a blue wire on the starboard side again on the bottom terminal. I have no idea if the wires are original or changed, the blue wire does look newer then the others...
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    Trim tab removal on a 1970s(?) Merc 500 Thunderbolt 50hp

    Hi there, can anyone advise how I remove the trim tab to get the lower unit off this engine? There is a small hole above it which is just large enough to get a thin 5/16 socket in but I am not sure if there is a bolt or Allan key inside it. Picture of engine and bolt I am referring to...
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