outlaw32
Member
I have a 2003 340 searay with 496 8.1 engines. I just replaced the exchaust manifolds because of water intrusion which hydra locked the engine. Lucky no damage. Motors run fine but when under load getting popping back through the flame arrester. I have check all wires installed new plugs, did compression check and everything seem good. Still popping just not all the time. Could I have bent a exchaust valve push rod when I hydra locked motor so exchaust valve not opening all the way.