hey guys,
i rebuilt and ported my engine with all new parts and, now it hardly wont run. At first start-up it ran great but, after about a couple minutes of running it starts misfiring like crazy and popping out of carb and wont rev up. The reeds valves are fine and the compression is at 135#. I checked the timing and it's at 20 btdc (advance) . One thing happened was when first fire up i forgot to torque the flywheel down and it came loose nearly falling off and, since then the engine has ran awful. By using a timing light the timing looks stable and doesn't jump around. I have tried a different carb that is known to be good, put in new spark plug, and changed fuel. Could be there something on the ignition side that causes conditions like this? I'm open to any ideas!!!!!!!!!! Thanks for any help!
i rebuilt and ported my engine with all new parts and, now it hardly wont run. At first start-up it ran great but, after about a couple minutes of running it starts misfiring like crazy and popping out of carb and wont rev up. The reeds valves are fine and the compression is at 135#. I checked the timing and it's at 20 btdc (advance) . One thing happened was when first fire up i forgot to torque the flywheel down and it came loose nearly falling off and, since then the engine has ran awful. By using a timing light the timing looks stable and doesn't jump around. I have tried a different carb that is known to be good, put in new spark plug, and changed fuel. Could be there something on the ignition side that causes conditions like this? I'm open to any ideas!!!!!!!!!! Thanks for any help!