I think I have read every post on every small engine forum in cyberspace about this problem. Motor is a Kawa FC420V 14hp single cylinder with 120psi compression, new coil, new igniter, rebuilt carb, new fuel pump and fuel lines, new fuel cap, new alcohol free fuel, and new flywheel key in slot as it is supposed to be. The coil was gapped on the flywheel magnet per specs and the valves were set to spec at TDC. It cranks fine and fires when choke valve is closed, but when I pull the lever back to Mr. Rabbit or Mr. Turtle it goes putt putt putt with a little smoke out the muffler, then KERPOW!! Upon examination, the spark plug is dry, but covered with black soot.
I don't think its getting too much gas, just gas at the wrong time or place. I've done everything I think possible to get the timing right, and I wouldn't expect a burned exhaust valve with 120 compression.
If I find the problem before I'm institutionalized, I'm sure it will be some minor detail that is staring me in the face that any novice 10 yr. old technician would see. All suggestions are welcome.
I don't think its getting too much gas, just gas at the wrong time or place. I've done everything I think possible to get the timing right, and I wouldn't expect a burned exhaust valve with 120 compression.
If I find the problem before I'm institutionalized, I'm sure it will be some minor detail that is staring me in the face that any novice 10 yr. old technician would see. All suggestions are welcome.