reawillplay
New member
'92 7.4 King Cobra 454 engine. Everything seems fine when you start out. You can run at any speeds for about 5 minutes. After that the boat will start to overheat and at about 2000 rpms there is a loss of power and the engine shakes a lot. I have replaced the cap and rotor and plugs. This did not help. Any ideas I am totally at a loss here.