Port Volts read low

arcticspud

New Member
Jun 4, 2009
59
Gig Harbor, WA
Boat Info
1999 310 Sundancer, Garmin 5208, GMR18HD and other toys.
Engines
Twin 5.7 mercruisers w/ v-drives.
I have a '99 310 with v-drives and twin 5.7 with carbs.

The volt meter on the port engine reads low. It shows 12-12.5, yet when you check the volts coming off the alternator itself, it shows 14.5 and the engines always start.

This side is for the starting battery. I replaced the gauge this spring and I know they are not too accurate. I also replaced the battery this spring.

Could the connectors be corroded? Bad wiring harness?
 

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