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What keeps proper firing order?

Hey,

I'm back with another question, since I'm new to outboards & 2 strokes in general I'm wondering what part of the engine provides the firing order on my 1990 Mercury Classic 40 HP outboard? Basically said, what acts as the distributor to maintain order?
 
I'm wondering what part of the engine provides the firing order on my 1990 Mercury Classic 40 HP outboard? Basically said, what acts as the distributor to maintain order?
The trigger and hub magnets on flywheel.
 
????------------Timing on most modern motors does not go out of adjustment for the life of the motor.-------Why are you asking this question ? ---Running problems with your motor ??
 
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