olympyk_999
Addicted to ArboristSite
the noise is from the impulse in the mag it works like you described...its basically to provide spark at low starting speed until it gets to running speed then the noise stops...uncle the i beam is offset to one side so there is no shin busting beam in the way on the other side you walk rite up to it. wich i may change due to the fact that running the lever with my left hand feels un natural to me but maybe it will be ok idk... and upon a little further inspection the connecting rod is not broken its just fine. the knock noise is coming from the magneto i took the cover off and there is a little pin that goes through a "cam lobe" that then opens and closes a set of points and it looks like it hangs up then after enough tension is built on it a very loud "snap" then the points open and close and around it goes again until the next revolution at the exact same spot does it again. and there is no spark... i have zero experience with a mag. if anyone want to give me a little lesson on how they work and what to check im all ears
you could start with gaping the points to spec (usually somewhere around .020"), and lightly filing them so they have a flat contact area, if still no spark then replace the condenser, a reputable auto parts store (been around a long time) should have the old books to look up part numbers or could match it up...no likely with big parts stores ...heres the manual for an AENL...theres info about troubleshooting the mag along with anything else you could ever need with that engine http://www.pittauto.com/customer/piauel/pdf/Wisconsin_AEN_AENL_AENS_instr_parts.pdf