Help is needed I am at a wall of my knowledge.
B43 onan in my 318 was running perfect.
Recently while mowing the lawn it just started spitting and sputtering and I limped it back to the shop then cleared up.
Went back out to cut and started again.
In The shop I have verified fuel, Compression, and what looks like ok spark in my spark tester.
tested coil and although not perfectly in specs, was running fine earlier with same readings. Swapped also with spare coil just for
testing purposes. Same result.
Tried to eliminate voltage issue at coil by applying 12v directly to Pos term with same result.
New plugs gapped at .025 and re-checked gap on recently new points gapped at .016
What am I missing here?
Thanks in advance!!