"Have a 1997 Mercruier 5.7 LX
"Have a 1997 Mercruier 5.7 LX Thunderbolt 5 V8 & 4 barrel Carb-, The problem I am having is when I started the boat there is a loud popping sound coming from the carburetor. The boat runs fine doesn't stall, idles fine. When I throttle up fast I get a backfire. The sound does not go away after running engine over time. Changed plugs, some where good some where bad can't really read plugs. HELP!"
"Have a 1997 Mercruier 5.7 LX Thunderbolt 5 V8 & 4 barrel Carb-, The problem I am having is when I started the boat there is a loud popping sound coming from the carburetor. The boat runs fine doesn't stall, idles fine. When I throttle up fast I get a backfire. The sound does not go away after running engine over time. Changed plugs, some where good some where bad can't really read plugs. HELP!"