Is there an ignition component on these models that typically fails? Points/condensor behind the flywheel? Tried bypassing the low oil switch (do they stick/ground-out/fail?) and also the On/Off switch same time; still no spark. Also, once I bypass those items the only wires remaining are ground wire (for the kill switch) and plug lead, which makes me think it's a breakerless ignition. Flywheel magnet is lightly sanded and cleaned, coil too. Not familar with this ignition system, no service manual.