[TGEarnest]

2004 Yam 25 hp 4 stroke manual start

Motor runs like a sewing machine for one minute (plus or minus 10 seconds), then starts choogling.

Shut the motor off for 5 or 10 seconds, restart, motor runs like a sewing machine for one minute, starts choogling.

I figure this is electrical because I can't see any significant mechanical changes (i.e. cooling) occuring in 10 seconds. My interpretation is that shutting the motor off resets something that then kicks back in incorrectly after about one minute.

Fuel level in glass inline fuel filter remains constant.

I hope this all comes down to a $5 dollar widget.

Background: oil/filter changed, new impeller, carb cleaned, new plugs, fuel filter looks good, shock treatment with seafoam today.

Any ideas on what could be causing this problem with these clues? Thanks for any ideas.

[rodbolt]

sounds more like a fuel issue to me but a quick check of the primary input coil voltage with an analog peak reading multimeter will confirm or eliminate ign.