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Question on decarbonizing scooter engine

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Bozo

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Jun 25, 2003, 4:20:22 AM6/25/03
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Hi All!

This is my question. I own a 2001 Hyosung sense with almost 8000km on
it now.
In the repair manual it says to tear down the engine and decarbonize
it every 8000km. I use motul synthetic scooter oil. Do I decarbonize
it or because I use synthetic oil can I still wait for it to reach
lets say 12000km before doing the job? It pulls just fine and it dosnt
over heat even in 30c weather.
Comments and suggestions are appreciated.

Thanks in advance.

Mike Lynch

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Jun 25, 2003, 12:05:24 PM6/25/03
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Dont.
"Bozo" <rubbe...@yahoo.com> wrote in message
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don-ohio

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Jun 25, 2003, 5:48:55 PM6/25/03
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Just remove the exhaust pipe and look up into the port and see if it
has carbon build-up(rotate the the crank to see the piston cut also).
If it's pretty well open, and i suspect it is, just de-carbonize the
muffler(if it's easy to get into)and reattach it and `smoke on'!
don-ohio (:^D

rubbe...@yahoo.com (Bozo) wrote in message news:<ed3cadef.0306...@posting.google.com>...

SolarFry

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Jun 25, 2003, 6:43:32 PM6/25/03
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W, Kmart and all boat supply stores have a product called Valve Tec that is
used to decarbonize the combustion chamber of 2stroke outboard motors. You just
add it to your gas tank and keep running.

The other part needs cleaning is the muffler. It gets clogged up with oil
residue and needs to be cleaned. I did mine with gasoline and then dishwashing
liquid.

You need to take the pipe (exhaust) off carefully without stripping the bolts
holding it to the powerhead. Then you plug one end and fill it with gasonline.
leave it overnight so it will dissolve the oils. then pour the gas out into a
pail. Fill the muff with soapy water to remove the gasoline so it won't blow
up. leave it overnight and then flush it.
This will get all the crap out. For a few days it will smell kinda flowery
from the dishwashing liquid but thats ok.

>Subject: Question on decarbonizing scooter engine
>From: rubbe...@yahoo.com (Bozo)
>Date: 6/25/03 1:20 AM Pacific Daylight Time
>Message-id: <ed3cadef.0306...@posting.google.com>

greggscooter

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Jun 26, 2003, 3:57:02 PM6/26/03
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IT doesn't take much carbon build-up on the walls of the exhaust port to
effect performance.

Once you have the pipe off, get down under there with a strong light and
scrape the port wall with a half copper penny held with needle-nose vice
grips, so as not to damage the port walls.
Then do as solarfry says with the pipe and silencer. .

Gregg
......................................................


"Bozo" <rubbe...@yahoo.com> wrote in message
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Dusko Lolic

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Jun 27, 2003, 5:38:05 AM6/27/03
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On 25 Jun 2003 22:43:32 GMT, sola...@aol.com (SolarFry) wrote:

>The other part needs cleaning is the muffler. It gets clogged up with oil
>residue and needs to be cleaned. I did mine with gasoline and then dishwashing
>liquid.

The easiest way to clean the silencer on a two-stroker is to burn it with
a blowtorch. Dismantle it as much as possible and hang it vertically so
that it can suck like a chimney then light it up at the bottom end. Hang
smaller parts from the inside of the silencer on a piece of wire and blow
them too. Let it cool, hammer it lightly and watch all the grit just fall
off. A few moves of a wire brush is all that is needed to get to bare
shining metal.
But think twice before you do it, if the silencer is chrome plated it
will turn blueish!!!

SolarFry

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Jun 27, 2003, 8:02:54 PM6/27/03
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This might be ok for a 4stroke but not a 2s. You risk having the thing blow up
in your face if you are not careful.. And all this does is burn the oil inside
and cauterize it as carbon residue against the inside of the muffler. Next time
it clogs up faster..


>Subject: Re: Question on decarbonizing scooter engine
>From: Dusko Lolic N_O_S_P_A...@dimb.hr
>Date: 6/27/2003 2:38 AM Pacific Standard Time
>Message-id: <4q1ofvoeehlqhdp7c...@news.htnet.hr>

Dusko Lolic

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Jun 29, 2003, 9:01:20 AM6/29/03
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On 28 Jun 2003 00:02:54 GMT, sola...@aol.com (SolarFry) wrote:

>>The easiest way to clean the silencer on a two-stroker is to burn it with
>>a blowtorch.
>

>This might be ok for a 4stroke but not a 2s. You risk having the thing blow up
>in your face if you are not careful.. And all this does is burn the oil inside
>and cauterize it as carbon residue against the inside of the muffler. Next time
>it clogs up faster..

Try it, just try it before you say anything elese.
You don't have to risk it (as you say) on a whole muffler, try it on a
small piece from the inside first.

tat-2

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Jun 30, 2003, 12:08:33 AM6/30/03
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Take the Muffler off and spray it with Easy-off oven cleaner, follow the
directions on the can and then flush with water.
Let it dry and whala... nice clean and decarbonized...

tat-2

I used this technique on a garelli moped for 4 years and over 8000 miles,
most others (that I have seen) died about 2500-4000 miles.

"Bozo" <rubbe...@yahoo.com> wrote in message
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greggscooter

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Jun 30, 2003, 1:36:47 AM6/30/03
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That's "viola"
....................................................
"


meman

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Jun 30, 2003, 2:08:07 AM6/30/03
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Will this really work? (decarb a 2-stroke and 4 stroke muffler?)

Easy off oven cleaner? Do you heat it up at all?
or just spray it in a cold muffler?

I want to do a clean of my 4stroke ch150 and 2-stroke aero 125 mufflers.

Which is the best method? Plug and fill with gasoline and have it sit
overnight to a day or two, then flush out with dishsoap and water method?
or
Easy off (spray it in and let sit overnight (longer?), then flush with water
method)?

I'm not about to torch them, I don't know about that.

thanks,
Joe

"tat-2" <ta...@rcn.com> wrote in message
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SolarFry

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Jun 30, 2003, 10:24:22 PM6/30/03
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I would recommend the ValveTec rather than tearing the engine down. If you go
to an outboard motor dealer you will find a selection of products to decarb the
engine.
They all work as I have used all of them.

I think I like the oven cleaner idea better than the messy gasoline one I used.


Now..

Do you have to stick the muffler in the oven? I hope its and electric oven..

I feel very weird about sticking a match into the muffler and blasting it ..

>ubject: Re: Question on decarbonizing scooter engine

>From: "meman" bi...@msn.com
>Date: 6/29/03 11:08 PM Pacific Daylight Time
>Message-id: <btQLa.60580$Fy6.17147@sccrnsc03>

ESG8675309

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Jul 1, 2003, 12:32:16 AM7/1/03
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I just sprayed it on and let it sit in the sun.

tat-2


"tat-2" <ta...@rcn.com> wrote in message
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Chris

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Jul 1, 2003, 9:59:13 AM7/1/03
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That's "VOILA!"
"greggscooter" <greggs...@attbi.com> wrote in message
news:P%PLa.60000$R73.9091@sccrnsc04...
> That's "viola"
> ....................................................
> "
>
>


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