Water for decarbination

[Tail_Gunner]

Now that's a first, recently ive read from a credible source that slowly pouring a pint of water into a carb while the engine is running say 1200-1500 rpm, will decarb the combustion chamber and piston crown..........any opinoin's?

 

[Boomyal]

Re: Water for decarbination

It'll do it for sure. It'd make a cylinder look like it had a headgasket leak. I just wouldn't know how fast to pour it.

Might be better to use SeaFoam. Doesn't the two stroke crowd use it all the time for that?

 

[Bondo]

Re: Water for decarbination

Ayuh,....... It's the Truth..............

It should take 30/ 45 Seconds to loose the Pint.........

You'll be Laboring the motor,.... Just don't Stall it.......

 

[bjcsc]

Re: Water for decarbination

Yep, that's an old school trick. A lot of people use a spray bottle instead of pouring. Some engines had water containers as accessories (on tractors, old autos) for exactly that purpose. There's a ton of technique info online...

 

[Tail_Gunner]

Re: Water for decarbination

Ok.............but since this does not clean the ring's or the valve's what would be the benefit of such a cleaning? Air flow or swirl?

 

[WillyBWright]

Re: Water for decarbination

Mister for sure. Can't hydrolock a motor using a mister. And yes it works. Undoubtedly a lot better for the environment too. The chemicals used are just plain nasty. Just make sure the motor gets a good long run afterward. And unlike using chemical decarboners, you mussn't let it soak.

 

[bruceb58]

Re: Water for decarbination

So what would make you think that you needed to decarb your engine in the first place?

 

[DHPMARINE]

Re: Water for decarbination

We used to do that in the early 60's,but it probably goes back to the the 30's 0r 40's.We also would sometimes use dry gas.Forgot ALL abought it.

It must 'steam' clean the piston top and exhaust valves to a point,but it probably does nothing for the rings.

That is the reason for engineTuner/Seafoam.Going in thru the intake and soaking makes a big diff.

DHP

 

[Tail_Gunner]

Re: Water for decarbination

So what would make you think that you needed to decarb your engine in the first place?

The boat has been up in lake Havsu for the last 4 years just putting around at low speed's (mother's old boat) Recently i noticed the carb popping at very low idle indicating a stuck valve and sure enough popped a bill right next to the prop barrel and it sucked her right in.

8) Nothing so elaborate as a comp check but it work's so i did use some seafoam and it cleared it up (for now) Guess im getting a little itchy to finish this project, right now it's still to cold to paint so.....im just tinkering around.

 

[bruceb58]

Re: Water for decarbination

popped a bill right next to the prop barrel

Can you explain what you mean by that? Never heard that expression before.

 

[Coors]

Re: Water for decarbination

An old mechanic I used to work for used pepsi, he said the sugar worked better than water. And it always worked(old ladies cars, never saw over 35mph, and would be all carbonned up).

 

[Tail_Gunner]

Re: Water for decarbination

popped a bill right next to the prop barrel

Can you explain what you mean by that? Never heard that expression before.

It is just a old and quick method to determine if a exhaust valve is sticking, if you take a dollar bill and place it next to a car's exhasut pipe it should never be pulled back into the pipe. If indeed it does suck back up into the pipe there's a very high probabilty that you have a exhasut valve sticking open


Hmmm that is as clear as mud, ok take a fresh dollar bill, hold it half way up the bill, now take you finger and snap the top edge it should freely move back and fourth.

You just take the bill place it next to the pipe, the exhaust should blow or keep the bill away from the pipe, if it suck's back up into the pipe you have a vacum in the pipe which is most probably a exhasut valve stciking.

Not a good method to determine this type of problem but it does save time when a slight miss is apparent. Let's one focus where the problem lies quickley.....

 

[bruceb58]

Re: Water for decarbination

Thanks for the explanation.

 

[bjcsc]

Re: Water for decarbination

popped a bill right next to the prop barrel

Can you explain what you mean by that? Never heard that expression before.

It is just a old and quick method to determine if a exhaust valve is sticking, if you take a dollar bill and place it next to a car's exhasut pipe it should never be pulled back into the pipe. If indeed it does suck back up into the pipe there's a very high probabilty that you have a exhasut valve sticking open

Ohhh. I thought it meant you were throwing $100 bills at it...seems to be part of every one of my solutions...

 

[Nova II 260]

Re: Water for decarbination

During WWII prop engined planes had water injection to make steam during combustion thereby allowing longer flights on a single tank of fuel. read related article
In the 70's, during 1st gas crunch, I did the water system on my Lincoln. Except I made steam and piped it to the carb. The 460cid ran very smooth and milage improved @ 10mpg or more. However, I had no control of volume and it would soak the air filter after shut down. It would drink 5 gal. water in a 200 mile trip. The wife ran it for 6 months as daily driver, with NO adverse effects or otherwise. My hillbilly engineered system just needed some refinements and off/on controls.
Perhaps, it could be next winter's boat project...thanks for the reminder.

 

[Nova II 260]

Re: Water for decarbination

another good article