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Old 06-20-2021, 07:52 AM   #1
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Default Engine loses power & stalls unless I idle

Replaced carbs week ago. Fuel water separator. Fuel filter. Spark plugs & oil filter. Took out in lake for first time ran ok. Lil spuddering then eventually stalled while cruising. Starts right back up n goes in gear than will lose power & stall upon acceleration. Only stays driving while in idle no wake zone.
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Old 06-20-2021, 01:58 PM   #2
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Welcome aboard!

It would be helpful to know what engine you have.
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Old 06-20-2021, 04:36 PM   #3
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97 4.3 mercruiser
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Old 06-20-2021, 05:46 PM   #4
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Since it’s starts right back up it sounds like fuel starvation. Have you checked the fuel pressure? Also check to see if the fuel tank vent is clogged.
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Old 06-20-2021, 05:54 PM   #5
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How to check fuel pressure?? & I'll check vent tube. Boat still on water now. I'll go thru it today
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Old 06-21-2021, 02:11 AM   #6
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Get a fuel pressure gauge from an auto shop. It will get tee into the fuel line just before the carburetor.
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Old 06-25-2021, 11:33 PM   #7
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Replaced all fuel lines. Vent tube filter was fine
just cleaned it. Took apart gas tank found pick up tube had a Lil screen filter shoved inside which was clogged. Removed the screen filter n cleaned tube with carb cleaner. Added stabil to fuel n topped off tank. Goin to lake in bout 39 mins to see if it performs better.
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Old 06-26-2021, 05:09 PM   #8
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So I fixed the issue. 100% sure it was the clog in pick up tube. Boat runs perfect. Planes fast idles smooth at any rpm. Thanx for the suggestions fellas.
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Old 06-26-2021, 05:15 PM   #9
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Glad you resolved the issue, enjoy the rest of the season.
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