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93 mercruiser 5.7 engine and dash wiring diagrams


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Hi all, I have been unsuccessful in locating a factory SERVICE manual for my boat. Anyone who could point me in the right direction? Or, in the meantime, I could use the engine wiring and dash wiring diagram.  Lots of loose wiring hangin around the engine I would like to figure out. My guess is some of it would lead me possibly to some gauges and warning lights in the dash that are on or not functioning.  Here's a pic of the serial number of  that helps



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