no spark on 982 Onan

[karamia]

Hello all. I have a CC 982 w/front and rear pto.
CC SER NO xxxxxxxU722459
MOD NO 143984399
ENGINE MOD NO B48G-GA19.9/3707B ONAN

Last year it was running fine except for the float needle sticking and flooding out the crankcase. It sat inside all winter.
I changed oil and filter and cleaned the carb. Would not start.
Checked and had good fuel , no spark. Condenser,points and plugs were new last year.
Steps I have taken so far:
1)checked coil ohms readings = fell within specs.
coil is original w/216 hrs on it

2)installed Kirk's PointSaver as per directions = no spark.

3)checked voltage @ + term on coil w/key in "run" = 12.67v
4)checked voltage @ + term on coil w/Key in "start" = 4.8v to 5.8v

Kirks instructions suggest a faulty coil if voltage less than 12v

5)replaced coil w/new Onan dual coil= no spark.
re checked voltage @ + term on coil w/key in "run" = 12.67v
re checked voltage @ + term on coil w/Key in "start" = 9.0v to 9.8v
note: new coil has standard automotive spark plug cable receptacles; therefore had to get new cables.
The new cables are standard non-metalic conductors. COULD THIS BE AN ISSUE?

6) checked ALL switches for function and possible grounding and cleaned all terminals.
One issue found @ key switch. The terminal holder was broken and some terminals had been arcing enough to burn and melt the holder slightly. Removed holder and insulated each terminal separately w/heatshrink.
NO SPARK.
re checked voltage @ + term on coil w/key in "run" = 12.86v
re checked voltage @ + term on coil w/Key in "start" = 9.5v

7)By passed the front and rear PTO switches and the relay. Disconnected the lights and hour meter.
result: (copy and paste here)
re checked voltage @ + term on coil w/key in "run" = 12.86v
re checked voltage @ + term on coil w/Key in "start" = 9.5v
Did see one (1) small spark in spark tester. Once.

Any thoughts, ideas and pity much appreciated.

Kerry.