couple type errors.. :-( above ....
EMM surveillance does NOT see everything that can be wrong but it tells you what is OK by not flagging problems !!
Multiple sensors can pick up things like electrical parameters exceeded or siimply out of specs like shorted or open injectors, coils...
here is one search result (example)
don't panic... great motors ...... just work methodically
https://docs.google.com/document/d/16BAQLd2i43h30MTOuWJ0-T6_DO9wX5yK5MzOOunwzUk/edit...
You may want to visit and consult with experts on the ETEC owners board
it also has a great search engine for problem solving :-)
https://www.etecownersgroup.com/latest
no carbs in ETECs ... fuel injected engines. if it won't throttle up, you need to find out why using EV diagnostic software to check fault codes..( a necessity for these complex machines) EMM surveillance does see SEE everything that can be wrong but it tells you what is OK !! Sensors do...
actually that generation of coils does not crack like the ones from the 1950s.... (see picture)..... if there are no obvious defects ( cracks) one should look elswhere . investing in condensers may be more timely.
some of the newer "non OEM" 20$ coils will sometimes leave me suspicious...
common magneto for ages start by just cleaning up the points with 200 grit paper then clean wih carb cleaner or acetone and retry. your coils are the newer kind and should show no cracks whatsoever.
rotate & set the rub block on the points cam at the highest point and check or...
https://www.leeroysramblings.com/OMC_6hp.htm
https://www.leeroysramblings.com/johnson_magneto.htm
and lots of info on utube if you search
has indicated these are the best little kickers for back-up and trolling
good find ! but don't overspend $$$ it may be best to find another donnor...