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09-05-2017, 12:04 AM
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#1
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Admiral
Join Date: Dec 2010
Location: central Illinois
Posts: 2,294
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Carb problem
OK guys I have had it with this problem with the starboard side engine/carb on 01 Maxum 3000 w/ twin 5.0 L 2 barrel mercury carburetors with bravo ll's
The symptoms are: pull the throttle out, neutral , give it one pump, turn the key and the engine turn over and it starts. Give it gas , it flutters and dies. Start it up again and same thing. Sometimes I can feather the rpm's up but will not hold and the engines dies. I can keep it running at idle rpm's but as I throttle up it dies. What gives ....
Roger
PS . my new mechanic Tony is coming over to look at the boat this wednesday.
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09-05-2017, 12:08 AM
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#2
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Captain
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 746
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When was the last time the carb was rebuilt?
National Carberutor is here in Jacksonville, and they have a lifetime warranty. I take my carbs back every couple years for a free freshening up. They actually test and tune the carbs on an engine each time.
My engines start on the second rotation of cranking every time, without touching the throttles.
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09-05-2017, 12:11 AM
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#3
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Captain
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 746
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Quote:
Originally Posted by biggerseagar
OK guys I have had it with this problem with the starboard side engine/carb on 01 Maxum 3000 w/ twin 5.0 L 2 barrel mercury carburetors with bravo ll's
The symptoms are: pull the throttle out, neutral , give it one pump, turn the key and the engine turn over and it starts. Give it gas , it flutters and dies. Start it up again and same thing. Sometimes I can feather the rpm's up but will not hold and the engines dies. I can keep it running at idle rpm's but as I throttle up it dies. What gives ....
Roger
PS . my new mechanic Tony is coming over to look at the boat this wednesday.
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I thought Tonys only worked on Fiats. Ya know, Fix It Again Tony.
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09-05-2017, 12:32 AM
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#4
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Admiral
Join Date: Dec 2010
Location: central Illinois
Posts: 2,294
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Different Tony but.....This is serious Kev! I had to stay on the dock and drink beer all afternoon today! Lol Happy labor day!
I think it might be time for a rebuild kit!
Roger
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09-05-2017, 12:34 AM
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#5
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Lieutenant
Join Date: Jul 2011
Location: New Jersey
Posts: 78
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I just went through the same problem with my 99 scr 3000. I had it rebuilt and it kept doing it. We played around with the idle would get it to work but a day later same problem. My mechanic explained that there are little parts that wear out over time in the carb and are not part of the rebuild. So I bit the bullet and grabbed a new carb. Working fine now. Really wasted time and money on the whole rebuild in hindsight I should have just put a new carb on to begin with. Hope this helps.
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09-05-2017, 12:38 AM
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#6
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Captain
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 746
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Quote:
Originally Posted by biggerseagar
Different Tony but.....This is serious Kev! I had to stay on the dock and drink beer all afternoon today! Lol Happy labor day!
I think it might be time for a rebuild kit!
Roger
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Just send it out and have a pro do it. Much better results. Look up national Carberutor. Or ship them to me and I'll run them over. Their shop is down the road.
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09-05-2017, 12:39 AM
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#7
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Captain
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 746
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Quote:
Originally Posted by biggerseagar
Different Tony but.....This is serious Kev! I had to stay on the dock and drink beer all afternoon today! Lol Happy labor day!
I think it might be time for a rebuild kit!
Roger
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That's a shame. My generator is running great now. We stayed out on the hook, put 24 hours on the gen. Everything worked great.
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09-05-2017, 12:51 AM
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#8
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Admiral
Join Date: Dec 2010
Location: central Illinois
Posts: 2,294
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Jayesq......where did u go for your carb?
Roger
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09-05-2017, 12:52 AM
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#9
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Lieutenant
Join Date: Jul 2011
Location: New Jersey
Posts: 78
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About 750
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09-05-2017, 12:54 AM
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#10
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Lieutenant
Join Date: Jul 2011
Location: New Jersey
Posts: 78
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Also this was I believe the 3rd time I had rebuilt it before going for the new one
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09-05-2017, 01:06 AM
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#11
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Admiral
Join Date: Dec 2010
Location: central Illinois
Posts: 2,294
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Who did u buy it from?
Roger
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09-05-2017, 01:14 AM
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#12
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Lieutenant
Join Date: Jul 2011
Location: New Jersey
Posts: 78
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I believe it was mercruiserparts.com. I had the mechanic order it for me and it took about a week to get.
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09-05-2017, 04:15 AM
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#13
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,606
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Roger did you let the engine warm up? Sounds to me like the choke is not opening. Even when cold an increase in throttle will cause it to open to allow more air flow.
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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09-05-2017, 06:34 PM
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#14
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Admiral
Join Date: Dec 2010
Location: central Illinois
Posts: 2,294
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Mike I did...... At idle rpm's for a good 10 15 minutes and when I could feather it up to around 2000. As soon as I lowered the throttle it died.
Roger
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09-05-2017, 10:02 PM
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#15
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,606
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Quote:
Originally Posted by biggerseagar
Mike I did...... At idle rpm's for a good 10 15 minutes and when I could feather it up to around 2000. As soon as I lowered the throttle it died.
Roger
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Did you remove the flame arrestor and verify the choke opened? May just be time for a rebuild.
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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09-06-2017, 01:32 AM
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#16
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Admiral
Join Date: Dec 2010
Location: central Illinois
Posts: 2,294
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No I just gave up and had opened up a blue moon!
Roger
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09-06-2017, 04:06 AM
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#17
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,606
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Quote:
Originally Posted by biggerseagar
No I just gave up and had opened up a blue moon!
Roger
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Nothing wrong with that. 
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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09-07-2017, 09:08 PM
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#18
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Admiral
Join Date: Dec 2010
Location: central Illinois
Posts: 2,294
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Carb update...... starboard side carb is off and being inspected at the shop.......film at 11.... hope to have the prognosis soon.
Roger
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09-08-2017, 10:22 PM
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#19
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Admiral
Join Date: Dec 2010
Location: central Illinois
Posts: 2,294
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Carb insides shot ...waiting for rebuilt kit....hopefully up and running Monday afternoon.
Roger
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09-08-2017, 10:55 PM
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#20
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,606
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Quote:
Originally Posted by biggerseagar
Carb insides shot ...waiting for rebuilt kit....hopefully up and running Monday afternoon.
Roger
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At least that answers the mail on the issue.
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__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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