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Hello all,
Recently bought a 1985 Nautique with a 351w. Previous owner replaced spark plugs, fuel pump, converted to electronic ignition (Pertronix Ignitor I) and added a Holley carb.
When I bought it, the engine would hesitate to start or require a lot of cranking. Then, once started, engine would run great at high RPM and bog down, get surges of power, and quit once throttled back. Boat was winterized and now will turn over, but not idle.
I verified correct wiring of the ignition system, and correct ignition coil type, changed the oil, checked the spark plugs, and cleaned the carb.
Just tried to start it up again this morning. Engine would turn over, run for a second or two, and then fuel would start overflowing from the primary carb vent only. After it was all said and done, there would be a lot of gas still coming out of the primary side of the carb into the barrels. Vent tube overflowed on start attempts where the throttle was advanced and on attempts where the throttle was at idle the whole time.
I pulled the needle and seat assemblies, and found that the secondary assembly had pieces of worn o ring in there. I cleaned it and resealed it. Primary assembly was good to go.
Questions: Could the secondary fuel bowl cause the primary bowl to overfill and overflow? If all needles, seats, floats, etc are cleaned and working with proper fuel press, then what could cause an overflow? What should my next step be to get this thing to run?
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