I am running twin 1977 Evinrude 70HP motors on my whaler. Great motors for 30 years, had one top end rebuilt 7 years ago including carbs, the other, just the carbs. Like I?ve said, they ran great, now this.
I run them for a while at 3500 (like 5 minutes) then lefty bogs, coughs, and stumbles. I...