I have a 50 year old jiffy ice auger that will fire a couple of times but will not start I replaced the fuel pump diaphragm no change replaced the carburetor with a new one no change other than the engine will kick back once in a while and pull the starter rope right out of your hand (ouch). Replaced the points and condenser a few years ago. I’m out of ideas any suggestions this old girl has been in the family for many years and drilled many 3 foot holes and has always run well