Why is my mercruiser I/O not starting?

Question

started fine yesterday, why is my larson boats engine not starting.

My battery is fine.

Novice boater

Answer 1

Are you engaging the choke at the outset.  I would check the fuel line first followed by the plugs and plug wires.  A good rule of thumb to remember is that engines need air, spark and fuel.  I would check each of these before determining if there is a bigger problem.