Carb cleaner fuel additive that works?
 

Thanks for the replies, I will try the Merc or Evinrude fuel additive. I
have also heard that SeaFoam works for some folks. I have always used stabil
in the gas. A Harley friend of mine suggested using a Briggs & Stratton gas
preservitive instead of stabil. It has a mix of 2 components and has 2 mix
levels, 1 for storage, i.e. over winter and one for limited operation, i.e.
summer. A lot of Harley guys in Wisconsin use the Briggs fuel preservative
and report improved results over stabil. BTW we have 10% Alchohol gas
here )Wisconsin) near the urban areas too which sux, but I travel for the
100% gas for my boat motor. Aslo, I have tried Regular, Mid, & Premium with
no noticable difference in performance. The manual (1972) says to use
regular or premium?? Regular is cheaper so that's easy, but any thoughts
from others? I can't detect any pinging with regular, but??

Thanks again for the replies,

Steve - 72 Johnson 50, 50th Anniversary dual carb.




"sherwindu" wrote in message
...
Sea Foam is similar to Stabil, but has the added ability to clean the
carbs. I
have had some success with Sea Foam, but better luck with a product like
Mercury's

Quick Silver fuel additive. Some of these products will actually break
off dirt
inside
your gas tank and fuel line contributing to the problem. A rusted or
dirty tank
should
be cleaned or replaced. An extra inline filter from the gas tank is a
good idea.

Sherwin D.

wrote:

I know several mechanics, that swear by "Sea Foam" . Some say it's the
best they've ever used.
YMMV

http://www.seafoamsales.com/motorTuneUpTechGas.htm

Roadrunner Newsgroup wrote:
Can anyone recommend a good carb cleaner fuel additive that works? I
try to
run out all my fuel after use (with stabil in it) but I would like to
know
if there is an additive that can remove the gum from the idle circuit
and
float needle that eventually builds up. I have a 1972 50hp Johnson and
I
have rebuilt the 2 carbs but it is starting to get a little gunked up
again.
It's been 4 years since the rebuild. It is a freshwater Northern boat
that
sits for the winter. One of the 2 float needles seems to stick and
free up
now and then. Unfortunately it only gets used about 25 hours per year.

Thanks in advance,

Steve

Carb cleaner fuel additive that works?
 

When I worked on turbines we used walnut shell for decarbing the engines.
Not so finely crushed, either. No chemicals were required with the walnut
shells but we also water washed the engines for minor cleaning. We used no
chemicals in the water because the high heat would have just caused anything
to plate on the high temp parts of the engines.

While operating a gas turbine plant in Latin America (GE LM1500s) using
diesel fuel supplied from Venezuela we had a severe vanadium plating problem
which just about halved the useful life of high temp items. That cheap
Venezuelan oil was pretty expensive.

Butch
"Shortwave Sportfishing" wrote in message
...
On Sat, 12 Aug 2006 08:22:19 -0400, JohnH wrote:

On Sat, 12 Aug 2006 05:44:42 -0400, "Eisboch" wrote:


"Jeff Burke" wrote in message
...
On 11 Aug 2006 15:17:01 -0700, "basskisser" wrote:
Again, there's been many many documented tests where they've used
various products much like, if not Seafoam, to clean carbon deposits.
Now I'm not saying that if the top of a piston has very minor carbon,
that seafoam won't make it look clean, but if you've got carbon enough
so that your compression has gone up, and results in pinging without
higher octane fuel, then it ain't going to do much for you.

Check with the Vulcan riders at vroc.org. The Vulcan 800 is known to
build
up
carbon from using high octane fuel or from lugging it too much. Seafoam
does the
trick on the 800, it sure worked on mine. I don't think the carbon
problem
is
causing any boost in compression, I think the "spark knock" that some
have
cured
with Seafoam was caused by carbon making hot spots that caused
pre-ignition.
Some bike got so bad that the engine actually had a knock in the engine
that
sounded like piston slap or bad bearings, turned out to be real bad
carbon
build
up that actually hit the pistons. Those bikes had to have their engines
torn
down. This could have been avoided if they used Seafoam, but not cured
once it
went that far.

Seems like I recall old shade tree mechanics using a device that hooked
up
to a garden hose and created a very fine water mist at the carb inlet on
cars that had carbon buildup on the tops of the pistons. The very small
amount of water that mixed with the air/fuel mixture was supposed to burn
off the accumulated carbon.

I don't think I'd try this on a modern, fuel injected, $14.000.00 engine
however.

I've seen people, back in the old days, pour a half pound of rice down
their carbs while the engine was going about 3500 rpm. A *lot* of black
stuff came out the exhaust! I don't know if it was carbon or just burnt
rice.

Again, I wouldn't try this at home.

When they built the new gas turbine power plant down in Killingly, I
wondered what the bright green smoke was coming out of one of the
stacks one day. I knew one of the engineers there, so one time I
asked him what the green smoke was.

Get this - finely crushed walnut shells. I guess they chuck them into
the turbines at low rpm to clean the burner cans from time-to-time.
The green is a chemical that does the cleaning and the fine crushed
walnut shells are the transport medium.

Don't; know if that's true or not, but that's what he said.

Carb cleaner fuel additive that works?
 

On Sat, 12 Aug 2006 12:50:04 +0000, Shortwave Sportfishing wrote:


When they built the new gas turbine power plant down in Killingly, I
wondered what the bright green smoke was coming out of one of the stacks
one day. I knew one of the engineers there, so one time I asked him what
the green smoke was.

Get this - finely crushed walnut shells. I guess they chuck them into the
turbines at low rpm to clean the burner cans from time-to-time. The green
is a chemical that does the cleaning and the fine crushed walnut shells
are the transport medium.

Don't; know if that's true or not, but that's what he said.

Probably true. I've heard walnut shells are also used similarly on
airplane turbines. They are also used for "selective" coating removals on
submarines.

http://www.compomat.com/walnut.shtml

Carb cleaner fuel additive that works?
 

Jeff Burke wrote:
On 11 Aug 2006 15:17:01 -0700, "basskisser" wrote:
Again, there's been many many documented tests where they've used
various products much like, if not Seafoam, to clean carbon deposits.
Now I'm not saying that if the top of a piston has very minor carbon,
that seafoam won't make it look clean, but if you've got carbon enough
so that your compression has gone up, and results in pinging without
higher octane fuel, then it ain't going to do much for you.

Check with the Vulcan riders at vroc.org. The Vulcan 800 is known to build up
carbon from using high octane fuel or from lugging it too much. Seafoam does the
trick on the 800, it sure worked on mine. I don't think the carbon problem is
causing any boost in compression, I think the "spark knock" that some have cured
with Seafoam was caused by carbon making hot spots that caused pre-ignition.
Some bike got so bad that the engine actually had a knock in the engine that
sounded like piston slap or bad bearings, turned out to be real bad carbon build
up that actually hit the pistons. Those bikes had to have their engines torn
down. This could have been avoided if they used Seafoam, but not cured once it
went that far.

Again, many many studies have shown otherwise.

Carb cleaner fuel additive that works?
 

I do run the engine dry of fuel with stabil mixed but don't drain the bowls.
I will check to see if there are accessible screws at the bottom of the
bowls. I had thought that the stabil would keep the fuel in the bowls
"stabil" as per the stabil 800 line, but I would rather remove as much fuel
as possible.

Steve


"sherwindu" wrote in message
...


jamesgangnc wrote:

This is an interesting topic. I've always thought the add to the gas
cleaners were sort of snake oil. After all gas it's self is a pretty
good dissolver, what could be in these cleaners that would do it better
but still not be so corrosive that it ate up all the gaskets. Anyone
really take a carb apart, look at, put it back together, run a can of
cleaner through, and then take it back apart and see what got cleaned?
That would really tell the tale.

I have pulled my carbs and cleaned the jets with fine wire, and that
seems
to do the job. I have used Stabil and SeaFoam(cleaner and gas
stabilizer), but
for season use, I'm just adding Mercury's Quick Silver solvent to the
gas. Works

for me, but the true test is when you take the engine out of storage to
start it.



I've always been in a quandry about carbs with float bowls too. I add
stabilizer to my boat gas and fill the tank as winterizing but it
mostly evaporates from the float bowls over the winter anyway.
Merc/chevy small block with a holley on it. I figure the stabilizer is
good for the gas in the tank but the carb problems are typically
because the gas evaporates and leaves crud on the inside of the jets.

On my generator, which we only use once in a rare while, I shut the
fuel valve at the tank and let the engine burn as much as it can from
the float bowl. I do periodically run the thing but I always shut it
down by turning off the fuel.

I've thought about adding a valve to the boat gas line right at the
carb so I could do the same thing to it.

Most carbs on marine engines, lawn mowers, and generators have a
drain screw for that purpose. A few of the cheaper models don't have
it.


I hope Steve is running his engine dry before storage and opening this
drain plug to purge any remaining gas.

Sherwin D.



basskisser wrote:
Roadrunner Newsgroup wrote:
Can anyone recommend a good carb cleaner fuel additive that works? I
try to
run out all my fuel after use (with stabil in it) but I would like to
know
if there is an additive that can remove the gum from the idle circuit
and
float needle that eventually builds up. I have a 1972 50hp Johnson
and I
have rebuilt the 2 carbs but it is starting to get a little gunked up
again.
It's been 4 years since the rebuild. It is a freshwater Northern boat
that
sits for the winter. One of the 2 float needles seems to stick and
free up
now and then. Unfortunately it only gets used about 25 hours per
year.

Thanks in advance,

Steve

If they are gunked up, I'd rebuild them again, then use preventative
measures to keep them that way, using Stabil and starting once in
awhile as Clams has said.

Carb cleaner fuel additive that works?
 

Roadrunner Newsgroup wrote:
I do run the engine dry of fuel with stabil mixed but don't drain the bowls.
I will check to see if there are accessible screws at the bottom of the
bowls. I had thought that the stabil would keep the fuel in the bowls
"stabil" as per the stabil 800 line, but I would rather remove as much fuel
as possible.

I'm not sure that Stabil will do anything in regards to evaporation,
and what's left over from that evaporation. I do know that it does work
in keeping gas that's left in a tank getting "stale" as it is generally
called.

Carb cleaner fuel additive that works?
 

Stabil treatment will not last forever. Certainly it will lose potency over a
winter
layup. Getting out all the gas is good insurance. I have more confidence in
products
like Mercury Quick Silver Cleaner, than I do in Stabil, although I still use
Stabil in my
lawnmower gas. Maybe using both will be helpful.

Sherwin D.

Roadrunner Newsgroup wrote:

I do run the engine dry of fuel with stabil mixed but don't drain the bowls.
I will check to see if there are accessible screws at the bottom of the
bowls. I had thought that the stabil would keep the fuel in the bowls
"stabil" as per the stabil 800 line, but I would rather remove as much fuel
as possible.

Steve

"sherwindu" wrote in message
...


jamesgangnc wrote:

This is an interesting topic. I've always thought the add to the gas
cleaners were sort of snake oil. After all gas it's self is a pretty
good dissolver, what could be in these cleaners that would do it better
but still not be so corrosive that it ate up all the gaskets. Anyone
really take a carb apart, look at, put it back together, run a can of
cleaner through, and then take it back apart and see what got cleaned?
That would really tell the tale.

I have pulled my carbs and cleaned the jets with fine wire, and that
seems
to do the job. I have used Stabil and SeaFoam(cleaner and gas
stabilizer), but
for season use, I'm just adding Mercury's Quick Silver solvent to the
gas. Works

for me, but the true test is when you take the engine out of storage to
start it.



I've always been in a quandry about carbs with float bowls too. I add
stabilizer to my boat gas and fill the tank as winterizing but it
mostly evaporates from the float bowls over the winter anyway.
Merc/chevy small block with a holley on it. I figure the stabilizer is
good for the gas in the tank but the carb problems are typically
because the gas evaporates and leaves crud on the inside of the jets.

On my generator, which we only use once in a rare while, I shut the
fuel valve at the tank and let the engine burn as much as it can from
the float bowl. I do periodically run the thing but I always shut it
down by turning off the fuel.

I've thought about adding a valve to the boat gas line right at the
carb so I could do the same thing to it.

Most carbs on marine engines, lawn mowers, and generators have a
drain screw for that purpose. A few of the cheaper models don't have
it.


I hope Steve is running his engine dry before storage and opening this
drain plug to purge any remaining gas.

Sherwin D.



basskisser wrote:
Roadrunner Newsgroup wrote:
Can anyone recommend a good carb cleaner fuel additive that works? I
try to
run out all my fuel after use (with stabil in it) but I would like to
know
if there is an additive that can remove the gum from the idle circuit
and
float needle that eventually builds up. I have a 1972 50hp Johnson
and I
have rebuilt the 2 carbs but it is starting to get a little gunked up
again.
It's been 4 years since the rebuild. It is a freshwater Northern boat
that
sits for the winter. One of the 2 float needles seems to stick and
free up
now and then. Unfortunately it only gets used about 25 hours per
year.

Thanks in advance,

Steve

If they are gunked up, I'd rebuild them again, then use preventative
measures to keep them that way, using Stabil and starting once in
awhile as Clams has said.

Carb cleaner fuel additive that works?
 

"sherwindu" wrote in message
...
Stabil treatment will not last forever. Certainly it will lose potency
over a
winter
layup. Getting out all the gas is good insurance. I have more confidence
in
products
like Mercury Quick Silver Cleaner, than I do in Stabil, although I still
use
Stabil in my
lawnmower gas. Maybe using both will be helpful.

Sherwin D.



A couple of claims from the Sta-bil website:

"STA-BIL stops the formation of varnish and prevents corrosion."

"One ounce of STA-BIL Fuel Stabilizer will keep 2-1/2 gallons of fuel fresh
for 12 months. Using twice the recommended dosage will keep fuel fresh for
up to 24 months."



Eisboch

Carb cleaner fuel additive that works?
 

Go to your local NAPA store and pick up a can of Sea Foam and dump the whole
can in the tank. It might take a couple of tanks to clean out the really
dirty systems. It'll keep your fuel system happy, and once you've cleaned
the system out, a few ounces every other tank will keep it clean.




"Roadrunner Newsgroup" wrote in message
...
Can anyone recommend a good carb cleaner fuel additive that works? I try
to run out all my fuel after use (with stabil in it) but I would like to
know if there is an additive that can remove the gum from the idle circuit
and float needle that eventually builds up. I have a 1972 50hp Johnson and
I have rebuilt the 2 carbs but it is starting to get a little gunked up
again. It's been 4 years since the rebuild. It is a freshwater Northern
boat that sits for the winter. One of the 2 float needles seems to stick
and free up now and then. Unfortunately it only gets used about 25 hours
per year.

Thanks in advance,

Steve

Carb cleaner fuel additive that works?
 

On 11 Aug 2006 07:53:17 -0700, "jamesgangnc"
wrote:

Interesting test idea. I'm at a loss to see how stabil could keep the
gas from evaporating. Maybe it hangs around with the gunk and makes it
easier for the new gas to disolve it?

My understanding, perhaps incorrect, is that the varnish formation is
a chemical reaction which Stabil somehow defers. More than
evaporation is involved with fuel deterioration although that is a
convenient way to accelerate and demonstrate gunk formation.