i have a 1986 merc. 140 four banger. the water temp reads 0. i touched the wire on the sender to ground and the needle jumped. i put in a new sensor in the thermostat housing (single wire ) and still nothing. any other wires i should be checking. thanks in advance.
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i need to redo some wiring on my 1986 140 merc i/o. the last guy "fixed " it up a bit and i want it to be fresh and correct. i'm looking for a schematic for it online. maybe something i can...
