Throttle Lever Function on Spark Advance Question?

[Klink]

On my 1990 Johnson 115 Crossflow, I notice that the Throttle Cam Lever on the engine, being as it is curved, will when set up right, fully advance the spark advance when the cam follower roller is about half way up on its travel. It will not advance spark advance rod any further after that point. This means that the spark is fully advanced quite a ways before the carbs are fully open.

Is this correct?

 

[Bosunsmate]

Re: Throttle Lever Function on Spark Advance Question?

Seems to be the way most evinrude johnson work that ive seen- spark moves first then carb comes in to play with top half end being mostly carb only.
Mercury if i recall correctly had fuel early and spark advance right through to wot