[A_Light48]

I replaced the carburetor on my 4.3 mercruiser this winter. It developed a missfire around 4300 rpms. I have replaced the cap, rotor, ignition coil, plugs and wires. But it’s still missing. Starts great and runs amazing at all rpms other then that ones spot, any ideas? Thanks

[mikeyt]

Probably the first thing i would check / replace is the wire from the tach to the coil. Next step would be to double check your timing. It may need to be retarded just a bit.