Hi Captains, I hope i'm in the right place.I have a 1996 Yamaha 250 saltwater motoring I have a problem with my telltail clogging up, so my marina suggested that I should have it replaced. So I look at it and decided that I could handle it myself. I then took off the six bolts, took off the two small hoses. Surprise there are wires behind it, I unplugged the two square plugs, so I get to the last plug its black and cylinder shaped, for the life of me I can not unplug this plug. Any help would be greatly appreciated. Thanks in advance for your advise.