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On Mon, 2 Oct 2017 09:59:55 -0700 (PDT), wrote:

On Monday, July 11, 2011 at 6:02:13 AM UTC-4, Steve wrote:
Hey all, I have a 2005 3.0l mercruiser sterndrive that is acting wierd. It
will run all day long, runs great, but at the end of the day, it refuses to
idle, it just dies on me. Start it back up and it will run full throttle
just fine, but try to idle and it dies. If I let it sit for a day or two, it
goes back to running normal.
So far I have rebuilt the carb, rebuilt the fuel pump, cleaned the fuel
filter. checked for water in the gas, put another ingnition module in,
replaced the coil. Im out of things to do.
What am I missing?
Thanks
Steve

--- Posted via news://freenews.netfront.net/ - Complaints to ---

I'm seeing the same thing - my 2008 Bayliner 195 with the Merc 3.0 has been in storage for about 10 months. I Winterized it properly. After charing the battery, it runs great, but will not idle below about 2000 rpm. I have no clue....
Usually this is the idle passages plugged up in the carb.
Take out the idle screw. Don't lose the spring. Shoot generous amounts
of carb cleaner in the hole. Reassemble and back out the screws about
2-3 turns. Start the motor rev it up and slam your hand over the
intake a few times to create max vacuum and dislodge what the carb
cleaner broke loose. Readjust normally and see if it is not better
(usually 1/12 turns out is a starting point).

If this is EFI, look for an idle air solenoid valve.