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.
TIRE AND WHEEL PACKAGES
STARTING AT $309 DELIVERED
CARBURETOR REBUILDING - $199
Parts, labor & return shipping included
HOLLEY MARINE 4160 FRESHLY REBUILT $329 DELIVERED
NO CORE CHARGE - 2 AVAILABLE
LED TRAILER LIGHTS
Originally Posted by Bouyhead
Installed my carb that was rebuilt by thatsmrmastsercraft, Thanks Peter!! Hot or cold this boat starts and runs like it fuel injected.