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Old 03-28-2013, 12:24 AM
thatsmrmastercraft's Avatar
thatsmrmastercraft thatsmrmastercraft is offline
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Join Date: Sep 2008
Boat: 1977 Stars & Stripes
Location: St. Paul, MN
Posts: 15,164
If you backfired through the carb, you have most likely blown your power valve- unless you have done the update. Pull the bowl, remove the power valve and check it out. Then check the routing of your plug wires. If they all go to the correct holes in the proper order, check the timing. Hopefully on of those issues and not a flat cam.
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