I have a 4.3 V6 in a 1989 Four Winns. It idles fine but bogs and does not want to accelerate when under load. I have changed the fuel filter, points, plugs, wires, cap, rotor, and rebuilt the carb. Timing is set at 6 degrees BTDC at idle in gear. At 3,000 RPM it is advancing to 19. Having...
