1997 Boat Owner
New Member
- Jun 3, 2018
- 6
- Boat Info
- 1997 330 Sundancer
- Engines
- 2 X 7.4L Mercruisers w/V-drives
Took my '97 SR 330 dancer for a shakedown ride. Everything great for 45 min's. Slowed to idle for no-wake zone and port engine shut off. I could restart it, but the only way to keep it running was to goose throttle and keep rpm's above 1600. Cursed. Turned around. Limped on 1 screw. Restarted port motor, put in forward in an rpm dip, ran the boat at 3200 back to dock. Ran smooth and strong (full rpm at full throttle,etc.) Died again once off plane. I believe the problem is voltage related. Voltage at the house and port batteries when idling is either 13.9 or 12.4. Sometimes it gets power from alt, sometimes not. Can't pinpoint conditions that lead to it not working (warm/cold/etc.) Checked wires, connections best I could. New batteries. New carbs. New fuel filters, fuel. New ignition parts. How likely is this the alternator? Does anyone know if the stock merc alternators have internal voltage regulator? Other ideas? Starboard engine perfect (has its own battery and alternator.) Does typical charge setup keep one side from helping the other?