Reply To: Backfire/misfire thru carb

[Don]

I think you are referring to all four coils, not powerpacks. This is just a terminology issue… I’m guessing that “brain box” equals “powerpack”, and “powerpacks” equal “coils”. Both engines have four coils, the 78 140 has two powerpacks, one on either side of the engine. The turbo jet powerhead has only one powerpack mounted on top of the engine.
And yes, the throttle linkage is completely different between the two engines.
That transom assembly with the power trim unit looks to be in nice shape, must have been a fresh water unit….