I have a 87' bayliner with a OMC Cobra 3.0L that is what I thought at first to be misfiring really bad. But upon further inspection I realized that the misfire sound was not entirely a misfire. I had just removed and reinstalled the motor and out drive to replace the shifter cable sleeve. After re-installation of everything, I fired up the boat to perform pre-checks before I water tested it. This is when I noticed that it had a bad misfire, or so I thought. After I removed and inspected the spark plugs and changed the points system, wires, cap and rotor. I then checked the fuel quality and noticed that everything was checking out, so initially I was convinced that the carb needed rebuilding, UNTIL.. Until I leaned on the exhaust elbow, and the misfire sound became exponentially worse. So now I am thinking that the exhaust elbow and the J pipe are randomly making contact, and coincidentally make a misfire sounds as it bangs together.
now the engine was making the same noise before I removed the motor, just more so now, and I can duplicate it at will just by pushing on the exhaust elbow, as well as releaving the noise by puling on the elbow.
So im positive that I have found my culprit, but im not sure how to fix it, or if I can.
My first thought is to removed the exhaust joint bellow and grinding down the J pipe for extra clearance?
Any thoughts?????
Thanks
now the engine was making the same noise before I removed the motor, just more so now, and I can duplicate it at will just by pushing on the exhaust elbow, as well as releaving the noise by puling on the elbow.
So im positive that I have found my culprit, but im not sure how to fix it, or if I can.
My first thought is to removed the exhaust joint bellow and grinding down the J pipe for extra clearance?
Any thoughts?????
Thanks