Hi
I have a 1987 2.3 OMC Cobra I/O on a 17' bayliner capri and it ran great for about 20 minutes and then wouldn't run above 2000 rpm without sputtering and bogging down.
After a long process of elimination (battery, alternator, coil, points, condenser, ignition switch, 20 gauge wire that acts as the ballast resistor, 50 amp fuses, spark plugs and spark plug wires, fuel pump, carburator kit, fuel tank/lines/filters/vents/check valve) I solved the problem.
The problem was in a section of the primary circuit of the ignition system:
1. the 20 gauge resistor wire to the positive post of the ignition coil.
2. the wire from the negative post of the coil to the distributor.
3. the distributor ground plate.
4. the ground plate screw to ground.
I replaced the wires (Ancor 20 gauge dual speaker wire for the resistor wire), buffed up all of the connections, and used dielectric silicone compound sparingly on the condenser and contact point bases just where they are mounted to the distributor ground plate
Also, I added a new ground wire from one of the distributor ground plate bolts (engine side in my case) to the lower mounting bolt for the starter solinoid. This was the only addition to the original electrical system.
I also used an OMC tune-up kit with an OMC condenser, contact points, and rotor.
I hope this is helpful.
Seguin
I have a 1987 2.3 OMC Cobra I/O on a 17' bayliner capri and it ran great for about 20 minutes and then wouldn't run above 2000 rpm without sputtering and bogging down.
After a long process of elimination (battery, alternator, coil, points, condenser, ignition switch, 20 gauge wire that acts as the ballast resistor, 50 amp fuses, spark plugs and spark plug wires, fuel pump, carburator kit, fuel tank/lines/filters/vents/check valve) I solved the problem.
The problem was in a section of the primary circuit of the ignition system:
1. the 20 gauge resistor wire to the positive post of the ignition coil.
2. the wire from the negative post of the coil to the distributor.
3. the distributor ground plate.
4. the ground plate screw to ground.
I replaced the wires (Ancor 20 gauge dual speaker wire for the resistor wire), buffed up all of the connections, and used dielectric silicone compound sparingly on the condenser and contact point bases just where they are mounted to the distributor ground plate
Also, I added a new ground wire from one of the distributor ground plate bolts (engine side in my case) to the lower mounting bolt for the starter solinoid. This was the only addition to the original electrical system.
I also used an OMC tune-up kit with an OMC condenser, contact points, and rotor.
I hope this is helpful.
Seguin