Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 646Get this manual
Quality of the image is intentionally reduced!
SERVICE MANUAL NUMBER 24
ENGINE COOLANT TEMPERATURE (ECT)
814 BLK 410 YEL
ENGINE COOLANT TEMPERATURE (ECT) SENSOR SIGNAL KNOCK SENSOR 1
496 DK BLU