Teaford.......do you ever read the answers to yer querry? Yesterday, I wrote.........there are 4-common runtime issues with the N-Engine.
1) runs fer about 1-min and quits; restarts innna'bout 5-mins; BAD condenser....NOT yer problem as stated
2) runs fer about 1-hr and quits; restarts after 4-hr cool down; BAD squarecan ignition coil; NOT yer problem
3) runs fer about 15-mins and quits; restarts after'bout 30-mins; BAD weaksister ignition switch, could be yer problem; NEW ignition switch ($10, cheap)
4) runs fer about 5-mins and quits; restarts innna'bout 5-mins; CLOGGED in tank fuel filter. sound like yer problem??? You will haffta un-screw yer glass bulb valve to clean the 2-tubes attached to the glass valve assy."
Read response #2, about the squarecan sparkie coil, it'll run fer about 1-Hr and dies Read response #3, weaksister ignition switch
Heres the deal, some previous shadetree owner "BYPASSED" the infamous ballast resistor for HOTTER sparkies and quicker starting. Well guess what??? That DUMB previous owner has now caused the insulative tar to melt inside the squarecan coil and short out some of the windings and AMAZINGLY enuff, WEAK SPARKIES and hard starting with less-than-stout 6-volt battery. That is WHY you can tow-start yer 8N 'cuz the battery ain't being dragged down by the ignition coil ballast resistor scheme.
HTH........Dell, yer sparkie-meister