This is my first time on this site and was wondering if i could get some help. I have an old briggs on a gravely tractor .the engine is a model 326437-0170-01. I have replaced the magneto ,points,and plug. The thing gets a weak spark when i hold rhe plug wire. and when i put the wire to ground i get a blue spark. but when i attach a plug (many diff ones tried)i get nothing.This is driving me nuts. The new mag does not tell me which way to the flywheel. I am not sure where the wires to the points go. does anyone have a picture to help me out? the mag came from NAPA but had no instructions with it. The air gap is correct, the points are at .20 and the plug is properly gapped, I put in a new Key on the flywheel.WHERE DO I GO FROM HERE???