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merc 200 efi #5161829 08/03/10 10:51 PM
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worm weight Offline OP
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Does it hurt to run non-foul plugs in a 97 merc 200 efi engine? The idle is low and will die.

Re: merc 200 efi [Re: worm weight] #5162481 08/04/10 02:26 AM
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BassHunter 69 Offline
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Non Foul????

Do you mean Gapless?


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Re: merc 200 efi [Re: BassHunter 69] #5162570 08/04/10 02:45 AM
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worm weight Offline OP
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Yes, I guess alway heard them called non - foul

Re: merc 200 efi [Re: worm weight] #5162790 08/04/10 03:27 AM
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limit 5 Offline
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Are thinking anti foulers like they use on car engines.

Re: merc 200 efi [Re: limit 5] #5163307 08/04/10 12:27 PM
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gary purdy Offline
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No! You need to find the cause of the running problem. I would treat the fuel with Sea Foam to clean the injectors and make shure all cylinders are firing. Change the manual fuel pump diaphrams, fuel filter and all fuel lines. Look at all of the bleed lines good at connections for cracks. The ignition advance module may have quit.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: merc 200 efi [Re: gary purdy] #5163410 08/04/10 01:10 PM
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Matt M Offline
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Originally Posted By: gary purdy
No! You need to find the cause of the running problem. I would treat the fuel with Sea Foam to clean the injectors and make shure all cylinders are firing. Change the manual fuel pump diaphrams, fuel filter and all fuel lines. Look at all of the bleed lines good at connections for cracks. The ignition advance module may have quit.


+1 The TPS also might need to be tweeked a little (special tool required) I would look there last and do everything gary suggested first


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Re: merc 200 efi [Re: Matt M] #5180955 08/10/10 04:22 AM
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worm weight Offline OP
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I just put the power head back on, it burned a hole in #5 piston. I replaced all the fuel lines and the buld which was decaying, only thing I have not replaced is the fuel diphrams and the water separator and the filter on the bleeder lines. I also removed the oil injection and am mixing the oil with sta-built. I am taking it to the shop this week to get electronics and injectors diagnosed. Thanks

Can you tell me how the bleeder lines work or what is the purpose for them?

Re: merc 200 efi [Re: worm weight] #5181189 08/10/10 11:40 AM
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gary purdy Offline
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They are their to bleed fuel to prevent puddeling, which causes ruff idle and bogging on take off.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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