1972 Other Ford Models engine miss

1972 FORD
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KEN LASSERRE
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Engine Performance problem
1972 Other Ford Models V8 Two Wheel Drive Manual

I am using a ford 400cid engine in a boat used in the marshes of south Louisiana. The engine starts fine, idles fine, but at rpm's above 3500 it begins to miss and cut out. In addition, when you put a load on it, it bogs down and blows black smoke. I have had the carb rebuilt, changed distributor, plugs and wires, filters and coil. What else could it be?
Oct 17, 2008 at 1:19 PM
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RASMATAZ
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Check the fuel pressure to rule out a weak fuel pump and make sure your carb's power valve is functioning properly and also ignition timing
Oct 17, 2008 at 1:25 PM