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Need your help! Engine bogging while accelerating

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Old 07-21-2016 | 01:41 PM
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When you say changed the fuel filter do you meen the water separator on the bottom from the the motor. If so then there is also a fuel filter in the carb behind the inlet fuel line. This will cause a hesitation or stall out when at full throttle. If you only replaced the fuel separator I would replace the fuel filter in the carb first. It's cheap and may fix it so you can do all of the other tune up/ carb rebuilt at a more convient time.
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Old 07-21-2016 | 04:00 PM
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Steel fuel lines and old gas = corrosion, which will get collected at the carb inlet filter. Done many of these last few years.

To the OP. Is the gas 2 yrs old ? If so, I would get rid of it or burn it at idle speeds only...doh.

Last edited by SB; 07-21-2016 at 10:34 PM.
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Old 07-21-2016 | 05:18 PM
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I don't believe in the snake oil in the bottle but a bottle of Chevron Techron can do a bunch of good in a fuel system.
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Old 07-21-2016 | 05:40 PM
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Originally Posted by DBleil89
When you say changed the fuel filter do you meen the water separator on the bottom from the the motor. If so then there is also a fuel filter in the carb behind the inlet fuel line. This will cause a hesitation or stall out when at full throttle. If you only replaced the fuel separator I would replace the fuel filter in the carb first. It's cheap and may fix it so you can do all of the other tune up/ carb rebuilt at a more convient time.
X2 well 3 actually.
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Old 07-21-2016 | 07:54 PM
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Originally Posted by Tmoran2
Excellent thanks for all of that its a huge help. My understanding is it was "sitting" the last couple seasons. The owner did run the boat here and there just not as much as years prior. It's in great shape but it definitely needs some engine love haha.
You could have some sediment type contaminants in the fuel tank from old gas 'sitting' too long. My brother ran into this issue and when he would be getting on plane the sediment would sometimes restrict the pick-up screen at the rear of the fuel tank and restrict flow causing a bog. If he eased it on plane it would cruise just fine. Took a while to figure this one out! I recommend running on a small remote tank and see if it improves.
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Old 07-21-2016 | 08:04 PM
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Originally Posted by liquidlounge
If you do not have thru hull exhaust (like many small blocks), then check to see if your flappers are intact in the top of the Y pipe. These flappers when they break loose will normally find their way into the drive, but sometimes will stay lodged in the Y pipe...where ever the flappers end up, they obstruct the exhaust flow and will cause a hesitation UNDER LOAD and shave off varying amounts of top speed. This is something that often gets overlooked on older boats and has confounded many a mechanic.
Appreciate the response, the boat DOES have thru hull exhaust. Does that change anything in regards to you response? Should I look for something different or specific?
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Old 07-21-2016 | 08:25 PM
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If it has thru hull exhaust, then it will only have your issue with the exhaust in the silent mode.
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Old 07-21-2016 | 08:45 PM
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Originally Posted by DBleil89
When you say changed the fuel filter do you meen the water separator on the bottom from the the motor. If so then there is also a fuel filter in the carb behind the inlet fuel line. This will cause a hesitation or stall out when at full throttle. If you only replaced the fuel separator I would replace the fuel filter in the carb first. It's cheap and may fix it so you can do all of the other tune up/ carb rebuilt at a more convient time.
That's correct I only replaced the water separator fuel filter...seems like carb worm is the patter here. Thanks for your help
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Old 07-21-2016 | 08:46 PM
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Originally Posted by SB
Steel fuel lines and old gas = corrosion, which will get collected at the crab inlet filter. Done many of these last few years.

To the OP. Is the gas 2 yrs old ? If so, I would get rid of it or burn it at idle speeds only...doh.
All the fluids including the gas were replaced by my dad and I upon purchase for that very reason. Seems like some carb work is a must. The boats great and in excellent shape for a 95 just want it running tip top shape.
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Old 07-21-2016 | 08:49 PM
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Originally Posted by 4mulafastech
You could have some sediment type contaminants in the fuel tank from old gas 'sitting' too long. My brother ran into this issue and when he would be getting on plane the sediment would sometimes restrict the pick-up screen at the rear of the fuel tank and restrict flow causing a bog. If he eased it on plane it would cruise just fine. Took a while to figure this one out! I recommend running on a small remote tank and see if it improves.
Appreciate that and definitely sounds similar. The funny thing is mine is better planning out when I give more throttle rather than less then just pull back. I think it's just needs a carb rebuild and maybe a little tune up.
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