@Crosbyman I Will be trying that for sure when back together, I don't have the lean sneeze tho, or maybe a form of that? What's happening to this motor is when I back the throttle down to its Lowest, the engine just dies. No sneeze, just dies. Ican make it sneeze by adjusting the low speed needle to lean.
Engine surging
Engine at its best settings I could get. It's to high in rpm for idle though, I had the link set to have the throttle valve stay open a smidge cause as soon as it closes the engine dies.
A little history on the engine as what I found when I acquired it few weeks ago. The crankshaft flywheel Key was sheared. It had rubbed the driver coil and magnets on the flywheel has minimal scaring. It did not look bad but it was what caused it to stop running. Also there is a chip out of the crankcase collar at the top. It is above the seal. I will test for a leak there but it is clean up top and I have seen leaky ones and you usually have some residue in that area.
Found this on the net that I will be going through. I've already did compression and attached test results. Carb was cleaned and I luckily have another to try. If no change I will go to reed valves and check those. I will replace the lower cs seal. Might do the top seal just for restoration purposes.
The engine could have any one of a number of things wrong with it. It could have low compression, bad crank seals, bad labyrinth seal, bad reed valves, dirty or misadjusted carb, bad fuel, bad plugs. You always start with a compression test. For results you are looking for 90 PSI or more, anything less is a fail. After that make sure all fuel is 100% brand new, no mix of new and old fuel. If that is good, run the engine and place your palm over the throat of the carb, you must feel suction at all times, if you feel any pressure or fuel spitting back at your hand, the reed valves are bad. If no change, run the engine on a 25 to 1 premix ratio (5 ounces of oil per gallon of fuel) If the labyrinth or crank seals are bad, what will happen is the oil will help seal those leaky seals. If the engine reacts by running better, or of the coughing is less, the engine has bad crank seals or a bad labyrinth seal on it. If that makes no difference, then you are likely looking at a dirty, misadjusted, or simply a bad carb that is leaking down internally.
