Water in the carb

scrobo

Petty Officer 1st Class
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Jul 5, 2007
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I've been told of an old trick used by many many guys "back in the day" when racing on the streets. My co-driver used to race his 48 fleetliner that was all hot-rodded up.

To clean out the carb and plugs etc they would get the engine really hot and slowly pour small amounts of water into the carb. This loosened dirt and crud from everything and cleaned it all out. Ran like crap when you poured the water in but worked better afterwards.

Anyone else heard of this? Would it work for a 2stroke outboard?
 

Scaaty

Vice Admiral
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May 31, 2004
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5,180
Re: Water in the carb

Zip to do with the carb, but it will clean out carbon in the combustion chambers...(but the gas and oil so much better nowadays, I'd pass...just run a Bottle of "Techron" concentrate in the tank, or Seafoam, or...)
 

scrobo

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Re: Water in the carb

I hag never heard of this before. It did intrigue me. Not that you can find a carb in a car nowadays :)

I was going to run a bottle of carb cleaner through it when I went up north today. Gonna look for Seafoam but if I can;t find it I'll go with some STP or something.
 

Silvertip

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Sep 22, 2003
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28,771
Re: Water in the carb

I'd stick with SeaFoam as it contains a lubricant where other fuel system treatments may not. Some of those treatments in a two stroke can strip parts of the oil needed for lubrication. SeaFoam definitely helps clear carbon deposits if used in the decarb procedure you can find on this forum.
 

mrfixitman40

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Aug 13, 2007
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Re: Water in the carb

I did a decarb on mine last night with the motor in a tank boy did that water turn black as night
 

JB

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Mar 25, 2001
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45,907
Re: Water in the carb

I was one of the guys "back in the day" who regularly decarbed my outboards with water.

It must be done right or damage may occur.

Engine must be at operating temp, in a tank where it can be revved under load. Rev to about 2,000rpm and keep it there. Squirt small amounts of water into carb(s) until engine just starts to choke. Continue for about 5 minutes. Run the engine at least five minutes after steam and crud are no longer in the exhaust.

Modern decarb preparations work at least as well and are a lot safer.
 

jspringator

Chief Petty Officer
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May 27, 2006
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415
Re: Water in the carb

Pouring water in a carb can hydrolock you pretty quick. A spray mist is different.
 

scrobo

Petty Officer 1st Class
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Jul 5, 2007
Messages
277
Re: Water in the carb

interesting.

I'm looking for the Seafoam this weekend. Sounds like a good product.
 
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