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  Can carb be cleaned and not rebuilt?

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Author Topic:   Can carb be cleaned and not rebuilt?
adaps4 posted 05-12-2003 09:36 PM ET (US)   Profile for adaps4   Send Email to adaps4  
I know you can get that spray can stuff, but can a shop clean the carb without rebuilding? I think one or two are gummed up a bit. Is this going to get expensive? Also, I only threw about a half charge on the battery before taking it out. Would this cause an engine to run sluggishly?
bsmotril posted 05-12-2003 09:52 PM ET (US)     Profile for bsmotril  Send Email to bsmotril     
Not advisable. A dirty carb causes lean running and that is the fastest way next to a bad water pump to toast a powerhead. Using a chemical dib or carb cleaner causes swelling of the carbs internal orings and seals speeding their deterioration. If you want to avoid a rebuild, remove and soak the jets, and needle-seat, not the entire carb.
BillS
Bigshot posted 05-13-2003 10:54 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Get a 16oz can of techron and mix it with a 1/2 gallon of gas. Run that through you engine at say 1000 rpms until almost gone. Shut down engine and let sit over night. Next day give her hell and see if it cleaned her out, should have.

If engine is not oil injected, don't forget to mix the techron 50:1 with oil.

adaps4 posted 05-13-2003 12:53 PM ET (US)     Profile for adaps4  Send Email to adaps4     
Thanks Bigshot- I am willing to give it a try. I will let you know what happens. All the Yamaha shops are booked up solid- so it may be my only option for a while.
bsmotril posted 05-14-2003 09:32 AM ET (US)     Profile for bsmotril  Send Email to bsmotril     
I thought you were talking about dipping the entire carb in the 1 gallon can type carb cleaner. My response was directed to that scenario. Bigshot's suggestion is a good one and certainly easier than removing the carbs.
BillS
Seawolf posted 05-14-2003 09:19 PM ET (US)     Profile for Seawolf  Send Email to Seawolf     
Sounds like you're talking about a gummed-up carb. Just went through a similar thing with a some dirt clogging my carb. Got ripped off for $240 to redo carb and fuel pump. The parts cost about $20, the rest was labor. If I understand correctly, you've got to remove the carb just to blow a piece of dirt out, correct me if i'm wrong. Seems like something which could happen frequently. I think it would be a good idea to purchase a service manual and learn how to do this myself, especially if it happens during a trip or at the beginning of a four day weekend like Murphy's Law says. Sounds like you have more than 1 carb. Try the easy way first.
HAPPYJIM posted 05-14-2003 09:54 PM ET (US)     Profile for HAPPYJIM  Send Email to HAPPYJIM     
I think I'm having carb problems too.
I went to the Johnson dealer and asked for a can of techron & he didn't know what it was.
Where do you get it?
tabasco posted 05-14-2003 11:33 PM ET (US)     Profile for tabasco  Send Email to tabasco     
Costco sells it now in a six pack for under $10
Cpt Quint posted 05-15-2003 10:30 AM ET (US)     Profile for Cpt Quint  Send Email to Cpt Quint     
unless your mechanic, $240 is ok for carb rebuild to make sure you get it done right. Also Berrymans B-12 is another product I recommned as opposed to Techron. In your car, one can of Berrymans will add about 50 miles on your tank. Its Techron on steroids.
where2 posted 05-16-2003 12:29 PM ET (US)     Profile for where2  Send Email to where2     
Techron is a Fuel System Cleaner marketed by Chevron. It's readily available at Chevron fuel stations, and sometimes Walmart/K-Mart/Costco also carry it. My little German Volkswagen with 165k miles on it, gets a bottle every 6 months... Although intended as a fuel injector cleaner, it nicely removes carbon buildup from the inside of the engine too.
Bigshot posted 05-16-2003 12:38 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I am a HUGE advocate for Berryman's B-12 but it aint the easiest thing to find. Techron is available at any Pep-boys, Autozone etc. If they have B-12 get that but the stff will eat your pait if spilled....steroids is an understatement.
Cpt Quint posted 05-16-2003 12:56 PM ET (US)     Profile for Cpt Quint  Send Email to Cpt Quint     
Bigshot, Walmart has been recently bringing the old cone top metal cans of B-12 in by the truck loads in automotive and selling 12 once can for $2.43. Unbelievable!
adaps4 posted 05-20-2003 11:44 PM ET (US)     Profile for adaps4  Send Email to adaps4     
Thanks for all the help.
I fixed it!!!!!! I am very excited to not have to spend that money. The Techron cleared up carb#2(middle), but the bottom one was really bad. I just disassembled them one by one, cleaned all the needles, and reassembled. Let it sit overnight, and BAM- started on the first try, and even idled smoothly.
After I established that everything was runnin well, I de-carbed the engine just for fun. It hadn't been done for a while. WOW- that stuff is nasty!!!! I thought the engine was on fire it was smoking so bad. It now runs smoove like butta, and no smoke- even at higher rpms. I guess tomorrow I will replace the spark plugs- cause I hear you have to after a de-carb- and then she is set.
Again, thanks for all the help. All in all, I am out a can of Techron, Carb Cleaner, and De-Carb, totalling about $30. The carb rebuild would have been at least $75 a piece. Gotta love it!!!!
Bigshot posted 05-21-2003 03:04 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Congrats on carb building 101.

Now on your second rebuild go to Napa and get a $5 set of Acetylin(sp) torch cleaners. They are in a small metal holder and look like about 20 small metal toothpicks. These are little metal files and clean carb jets like a banshee. If you use them and some compressed air to blow things out you can rebuild and run immediately instead of letting the carbs boil in cleaner for a night or 2.

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