93 OMC 5.0 turns but won't start

PatBurke

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Joined
Aug 28, 2011
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2
It's a 93 OMC Cobra 5.0 EFI.

So the boat was running great, then one night it fired up for about 5 seconds, then died. Now it just cranks and cranks but will not start. Tank side fuel lines are good - no clogs (new anti-syphon valve). Replaced the fuel/water separator 3 months ago. The fuel pump does come on - it makes it's usual sound for a couple seconds when I turn the key. The engine won't even cough or try to start when i spray starting fluid in the flame arrestor. butterfly in air intake opens fine when i crank the throttle. Spark is OK. Maybe air or fuel blockage? Any thoughts appreciated!
 
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