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What is the best treatment to put in gas to clean a carburetor?

Posted on 7/31/25 at 2:45 pm
Posted by SCwTiger
armpit of 'merica
Member since Aug 2014
6840 posts
Posted on 7/31/25 at 2:45 pm
I'm trying to revive a '02 Honda Rancher that's been sitting for about 4-5 yrs. Before it got parked the carb was cleaned, and it will crank easily with the choke and idles great. When you try to accelerate the sputtering starts and it will go with the help of the choke being pulled, but it does a lot of popping almost like a backfire.

With all that said, is there any kind of fuel treatment that will clear this up or do I need to manually clean the carb? TIA
Posted by REB BEER
Laffy Yet
Member since Dec 2010
17596 posts
Posted on 7/31/25 at 2:52 pm to
The general consensus of the OB is Seafoam. I have used it directly in the carb of a chainsaw that wouldn't stay running. Poured a little in and it smoked like hell for about 5 seconds but ran great after that.
This post was edited on 7/31/25 at 4:48 pm
Posted by TheDrunkenTigah
Baton Rouge
Member since Aug 2011
18109 posts
Posted on 7/31/25 at 2:53 pm to
A brush
Posted by REB BEER
Laffy Yet
Member since Dec 2010
17596 posts
Posted on 7/31/25 at 2:56 pm to
You can also pull the air filter out, rev it up and put the palm of your hand over the air intake to cause a vacuum, then pull it off before the bike dies. This will sometimes suck the trash out of it.
Posted by Loup
Ferriday
Member since Apr 2019
15522 posts
Posted on 7/31/25 at 3:06 pm to
I've tried seafoam a few times and it's been hit or miss. I like breaking the carb open and putting it in chem dip for a few hours.

Posted by Catahoula20LSU
Louisiana
Member since Oct 2011
2807 posts
Posted on 7/31/25 at 3:22 pm to
I soak the carb in Yamaha carb dip. Same stuff and you can get it at any Yamaha dealer.
Posted by bbvdd
Memphis, TN
Member since Jun 2009
27946 posts
Posted on 7/31/25 at 3:40 pm to
did you replace the fuel lines?
Posted by beerJeep
Louisiana
Member since Nov 2016
37660 posts
Posted on 7/31/25 at 4:00 pm to
Cocaine
Posted by SCwTiger
armpit of 'merica
Member since Aug 2014
6840 posts
Posted on 7/31/25 at 7:20 pm to
quote:

did you replace the fuel lines?

Haven’t done anything but put new gas and new battery.
Posted by TigerDat
Member since Aug 2010
8089 posts
Posted on 7/31/25 at 9:00 pm to
I've used mechanic in a bottle for my weed trimmer and my son's small atv and its worked every time
Posted by greasemonkey
Macclenny Fl aka south JAWJA
Member since Aug 2012
2802 posts
Posted on 8/1/25 at 7:57 am to
The pilot jet is clogged. Not likely for seafoam or such to help.
Posted by Twenty 49
Shreveport
Member since Jun 2014
20713 posts
Posted on 8/1/25 at 8:48 am to
My Honda generator started surging. I tried replacing the gas, cleaning the carb, replacing a jet, etc. and nothing worked.

Poured in Seafoam in an amount per the instructions. Nothing. Poured a little more. Nothing. Said F it and poured about 15 times what it recommended. The white smoke soon started, followed by a smooth running generator. Sold me on it.
Posted by Flats
Member since Jul 2019
26725 posts
Posted on 8/1/25 at 9:08 am to
quote:

Sold me on it.


I have a couple of Stihl 2 strokes that see very sporadic use, like 3-4 times a years. Normally that's a nightmare for 2 strokes, but I started using Seafoam in the gas mix, I think just an ounce/gallon or whatever the label says. They can sit untouched for 6 months and they crank on the second pull.
Posted by Austin350
Simsboro, LA
Member since Jul 2025
17 posts
Posted on 8/1/25 at 9:13 am to
pour sea foam directly into the carb while its revved up
Posted by TFLEX
TX
Member since Jun 2023
272 posts
Posted on 8/1/25 at 11:57 am to
What these guys have said! Seafoam works amazing. As well as spraying it or carb cleaner into carb while running.

Several times I've had an outboard, mower, atv that gets a little finicky- spray some carb cleaner down the throats, if easily accessible- pull plug and spray it into main jet, and dump whole can of seafoam into the tank. Cleans right up.
Posted by slinger1
Louisiana
Member since Jun 2017
287 posts
Posted on 8/1/25 at 12:14 pm to
You can get a complete kit carb with all the hoses for less than 50 bucks
Posted by Cypressknee
Member since Jul 2017
1447 posts
Posted on 8/1/25 at 1:35 pm to
You can try seafoam but 9/10 the carb needs to be gone thru again.
Posted by DownshiftAndFloorIt
Here
Member since Jan 2011
70776 posts
Posted on 8/1/25 at 2:05 pm to
quote:

the best treatment


OMC Engine Tuner is where it's at. That's your best bet. Yamaha ring free also works well.

Seafoam MIGHT work. Certainly worth a try, it's easy enough. Mix a gallon of gas with a whole can of seafoam and give it a go. It doesn't work as well as the above products though.

Keep in mind that these are usually placebo pills for carburetor removal denial syndrome. Odds are you'll end up needing to take the carb off.
Posted by Stat M Repairman
Member since Jun 2023
797 posts
Posted on 8/1/25 at 3:00 pm to
If you cant get it you'll have to disassemble the carb and put it in an ultrasonic cleaner.
Posted by footballdude
BR
Member since Sep 2010
1111 posts
Posted on 8/1/25 at 3:20 pm to

1. Blaster Small Engine Tune Up
2. Stabil Fast Fix
3. Seafoam
4. Pull carb and disassemble
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