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Default 3.0 wont idle but runs great

On 6/2/2016 10:54 AM, Tim wrote:

Anyone notice the date on this original post? "

Oh yes John. By being on google boats I always see the date and somebody probably did a search and this thread popped up. They reply to it then the thread resurfaces from the muck.

I like it. Same with Philip and his oars.

I like that one too!

There's a couple or three guys here who don't have both oars in the
water. Most of us know who they are. ;-)
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Default 3.0 wont idle but runs great

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....
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Default 3.0 wont idle but runs great

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.
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Default 3.0 wont idle but runs great

Did you ever figure out why your 3.0 Merc wouldn't idle when warm? I have the same problem. Would appreciate any advice. Thanks
Todd
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Default 3.0 wont idle but runs great

wrote:
Did you ever figure out why your 3.0 Merc wouldn't idle when warm? I have
the same problem. Would appreciate any advice. Thanks
Todd


You probably need a carb cleaning. Low speed idle circuit plugged.

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