Posts: 193
Location: Mayer, MN | Well I am asking for a little help. Maybe a little back and forth dialog.
I have had a diagnosis on my boat, it has been determined that I only have 6 volts of power at the points in my I/O. Obviously it should be at 12 volts, hence the hard starting and weak spark (not much snap at all when plug is in boot and grounded against engine) at the plug. This is the 4.3L (GM) engine. I have not torn into yet and I have not purchased a OMC repair manual yet.
My question is can anybody help me diagnose the culprit?
For background I have replaced cranking battery, coil, plugs, points, condensor, rotor button, ignition switch, and distributor cap. |
Posts: 5874
| Is this a fairly old motor? I aske because of the points/condensor. If I recall, these ignition systems used some sort of a resistor to drop the voltage to the coilt, to keep the points from arcing away. Usually not during starting, but once the motor was started. Ballast Resistor is what it was called. Some, like Chrysler products had a separate resitor mounted near the coil, I think GM built it into the wiring harness. I think the voltage dropped to 9 Volts. If it is 6 volts, that would be low. It should be nearly 12 volts while cranking.
You should measure the voltage at the coil, not the points.
Wow, I feel old, and my head now hurts.
Edited by Shep 7/18/2006 1:35 PM
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