Engine doesn't start

[Lightning Rod]

A couple time this past week the boat doesn't want to start...2006 22i Riders Edition

It turns over but wont fire up

Things I checked...

Spark is there
Injectors are firing
Spark plugs are changed
Fuel comes out of shrader valve, pressure not checked yet

Sometimes it starts perfectly but then when you shut it off it won't start back up...

Gonna check the fuses tomorrow in the Marine Power relay/fuse box on top of engine

Where is the ECU located?
What else can I do?

Thanks
Rodney

[boatwakes]

If you can apply throttle in neutral and it starts it will be your idle air control valve (iac).

[Lightning Rod]

I tried that with no luck

[Lightning Rod]

I changed the crank sensor, cam sensor, cap and rotor...
Fired right up...purrs like a kitten

The cap was pretty corroded/oxidized inside also...probably was the whole cause

[scoot18]

This past summer I had the same issue, diificult and extended cranking, happened a couple of weeks in a row. I found the same thing, contacts in the distributor cap were all funked up with corrosion. Replaced it and the rotor, all good to go.