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Max Online: 36273 @ 01/23/13 02:34 PM
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#11878847 - 10/13/16 12:21 PM Carbon buildup
texsam Online   content
Angler

Registered: 11/04/13
Posts: 250
Loc: cedarcreek tx.
carbon prevention?
I have a large, underpowed duracraft . On slick water4500 r.p.m 's gets about 40 mph. Itroll and scan a lot
2 to 5 m.p.h. what can I do reduce carbon buildup? thanks in advance.
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#11878881 - 10/13/16 12:36 PM Re: Carbon buildup [Re: texsam]
texasbass1 Online   content
TFF Celebrity

Registered: 02/12/05
Posts: 5197
Loc: The Colony, TX
Seafoam will help a bunch. What type of motor are you running?


Edited by texasbass1 (10/13/16 12:37 PM)
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#11879166 - 10/13/16 03:13 PM Re: Carbon buildup [Re: texsam]
texsam Online   content
Angler

Registered: 11/04/13
Posts: 250
Loc: cedarcreek tx.
97 model 115 johson faststrike , I allways use seafoam.
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#11879373 - 10/13/16 04:59 PM Re: Carbon buildup [Re: texsam]
SoonerDG Offline
Extreme Angler

Registered: 02/15/02
Posts: 1482
Loc: Joshua, TX
Seafoam is good stuff. For my Etec they recommend if you do a lot of idling to run the boat WOT for a bit to clean out the injectors. Not sure if that would apply to a carbed engine.
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#11879956 - 10/14/16 01:29 AM Re: Carbon buildup [Re: texsam]
Bobby Milam Offline
Extreme Angler

Registered: 07/13/14
Posts: 2101
Loc: Arlington
I drive slow a lot scanning but then I drive WOT too. Ive pulled my plugs and looked at them to see how they look and they never show signs of burning bad or foul out.

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#11892085 - 10/21/16 07:14 AM Re: Carbon buildup [Re: texsam]
Gamblinman Online   content
Extreme Angler

Registered: 11/26/02
Posts: 2145
Loc: Yantis, TX
Proper propeller and Seafoam will sure help.
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#11892327 - 10/21/16 09:20 AM Re: Carbon buildup [Re: texsam]
BMCD Online   content
TFF Team Angler

Registered: 11/01/02
Posts: 3564
Loc: Katy, Texas US
Make sure your running proper RPMs at WOT. And some additive of your choice.

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#11892357 - 10/21/16 09:31 AM Re: Carbon buildup [Re: texsam]
dustinmoorman Offline
Outdoorsman

Registered: 07/18/16
Posts: 126
Loc: Rockwall, Tx
I'm in a similar position as you are. I'm over propped pretty significantly and hoping that's my only problem. With just myself and a mornings worth of gear I can do about 4800 rpm on glass water, and my engine should be somewhere in the 5600 range I believe WOT.

I'm just making sure to use the mercury fuel additives as I go out for the time being before I can get my hands on a new correct prop. My thoughts are this is better than doing nothing about it.

(Mercury Quickcare as a sort of "fuel stabilizer" and Quickleen as the fuel system cleaner)

I have also shot sea foam into the carbs one afternoon and let it smoke out my driveway after about 15 minutes. Not sure if it's a placebo effect but I believe my engine at least sounds better now!

Cheers
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#11911067 - 11/01/16 08:34 AM Re: Carbon buildup [Re: texsam]
Lake Fork Guide Marc Mitchell Offline
TFF Team Angler

Registered: 10/10/06
Posts: 3837
Loc: Sulphur Springs TX
Sea Foam all the way. Use it in everything I own.
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#11911075 - 11/01/16 08:37 AM Re: Carbon buildup [Re: texsam]
361V Offline
TFF Team Angler

Registered: 11/21/08
Posts: 4118
Loc: somervell county
Originally Posted By: texsam
97 model 115 johson faststrike , I allways use seafoam.
You've already got everything covered. Relax! :-)
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#11911315 - 11/01/16 10:56 AM Re: Carbon buildup [Re: texsam]
burner42 Online   content
Outdoorsman

Registered: 07/19/16
Posts: 168
Loc: Dallas Texas
Yamaha makes a product Ringfree Plus, it de carbonizes and treats fuel for ethanol. If you think you have carbon buildup you can run an extra amount above the recommended amount of 2 oz per gallon to break it down quicker. I own a Yamaha so I like the Yamaha products.
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#11914210 - 11/02/16 09:52 PM Re: Carbon buildup [Re: texsam]
8upwithfishin' Offline
Pro Angler

Registered: 02/22/09
Posts: 623
Loc: McKinney, Tx.
Ringfree!

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#11914410 - 11/03/16 05:47 AM Re: Carbon buildup [Re: texsam]
Brad R Online   content
Pro Angler

Registered: 03/09/15
Posts: 845
Loc: Texas
Year: 1977.

I recall a wealthy customer of a Cadillac salesman, Johnny C., coming in to the dealership, her caddie was coughing and spitting and running very poorly. Someone in service got to her before Johnny showed up that morning, said her motor was kaput and it would need a major overhaul. Johnny came in, found out what was going on, told the lady to take a seat. He knew that all she did, every day, was drive a few miles slowly in and around Highland Park. He took the keys from the service writer and in the next moment it seemed, there he went screaming down Preston Rd. About 20 minutes later, he pulled back in, walked over to the lady and said she was ready to go, no charge, and that he'd see her later.

We asked him what the heck had he done? Johnny said that he knew the old lady very likely had a build up of carbon from low speed and infrequent driving, that there was nothing truly wrong with the engine. His old-time remedy? He said he added a few gallons of diesel fuel to the tank, he either advanced or retarded the timing a few degrees (I can't recall which), then took the car down the road at full throttle in its first gear automatic transmission setting, got to the highway, shifted to drive, and opened it all the way up racing down a few miles and back on North Central Expressway. By the time he returned to the dealership, all of the carbon had been dislodged. The car ran perfectly smooth, not a hitch.

He saved the lady from an "over diagnosis" and an expensive but needless repair job.

***I have no idea whether any of this would work on a boat, but it just goes to show how carbon can contribute to a loss of performance. There are some nice products out there, today, to control carbon build up. No need to lubricate an engine with a few gallons of diesel . . . but it sure worked 40 years ago!

Brad

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