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Old 09-04-2017, 11:04 PM   #1
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Default 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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Old 09-04-2017, 11:08 PM   #2
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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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Old 09-04-2017, 11:11 PM   #3
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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.
I thought Tonys only worked on Fiats. Ya know, Fix It Again Tony.

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Old 09-04-2017, 11:32 PM   #4
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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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Old 09-04-2017, 11:34 PM   #5
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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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Old 09-04-2017, 11:38 PM   #6
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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
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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Old 09-04-2017, 11:39 PM   #7
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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
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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Old 09-04-2017, 11:51 PM   #8
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Jayesq......where did u go for your carb?

Roger
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Old 09-04-2017, 11:52 PM   #9
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About 750

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Old 09-04-2017, 11:54 PM   #10
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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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Old 09-05-2017, 12:06 AM   #11
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Who did u buy it from?

Roger
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Old 09-05-2017, 12:14 AM   #12
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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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Old 09-05-2017, 03:15 AM   #13
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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.
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Old 09-05-2017, 05:34 PM   #14
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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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Old 09-05-2017, 09:02 PM   #15
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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
Did you remove the flame arrestor and verify the choke opened? May just be time for a rebuild.
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Old 09-06-2017, 12:32 AM   #16
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No I just gave up and had opened up a blue moon!

Roger
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Old 09-06-2017, 03:06 AM   #17
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No I just gave up and had opened up a blue moon!

Roger
Nothing wrong with that.
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Old 09-07-2017, 08:08 PM   #18
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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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Old 09-08-2017, 09:22 PM   #19
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Carb insides shot ...waiting for rebuilt kit....hopefully up and running Monday afternoon.

Roger
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Old 09-08-2017, 09:55 PM   #20
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Carb insides shot ...waiting for rebuilt kit....hopefully up and running Monday afternoon.

Roger
At least that answers the mail on the issue.
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