chris180searay
Recruit
- Joined
- Oct 18, 2010
- Messages
- 2
my 3.0 mercruiser will not run right unless I disconnect my alternator. I start it without the 2 pin connector in the alternator and it runs perfect. plug in the 2 pin connector and instantly, the spark gets erratic and it eventually dies.charging at 14.0 volts. I am auto tech, but I am stumped on this one. all my cables and connections ohm out perfect, no crazy voltage drop anywhere. new battery and distributor last year. was running perfect till last weekend. I threw in a known good coil for the hell of it. seems as if the alternator is back feeding. as a sidenote, while its idling like crap if I operate the trim motor or unplug/plug in the elec choke it clears up for a second or 2. please, any insight would be helpful!!