2 beep alarm boat will not start

Bretko23

New Member
May 9, 2018
24
Bridgeport, NY
Boat Info
225 weekender 2002
Engines
5.0 MPI Mercruiser
Hello folks. 5.0 mercruiser MPI here. Cruised fine until we got 2 warning beeps with an interval of a few minutes then 2 more beeps (warning) arrived at destination now boat will not start. I can get her to run if i "rev" throttle arm but as soon as I return arm to neutral position she dies.fluids are all up to snuff and brand new gas.....Help if ya can!!!!!
 
What is the IAC value and what does it control or do?
 
If you can’t get a hold of a Merc IAC valve, the Standard Auto AC423 model fits. You can pick those up from the auto parts store. Lots of YouTube videos of Merc 5.0l IAC replacement. Is a pretty simple job.

The ac423 comes with the wrong gasket, so you need to get some silicone rtv when you are at the store
 

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