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Author Topic: Carb Varnish ?  (Read 3100 times)
ar963
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« on: October 17, 2005, 11:56:26 AM »

Does anybody know of any chemicals or tricks to get varnish out of a carb?

Its a carb out of a two stroke polaris that sat for many years.

Any help would be appreciated.
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« Reply #1 on: October 17, 2005, 12:04:53 PM »

Pull the carb and unscrew the bowl. Mostly likely if it's been years the bowled is caked with old gas. Once the bowl is off just use cheap carb cleaner on it. Carb cleaner seems to work fine. Then take the main jet out and clean it. Then do the idle jet. Clean the floater too. I usually get a air compressor with an air nozzle and after cleaning I spray all the holes with air to make sure all the gunk is cleaned. Hope this helps.  -Mark
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ar963
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« Reply #2 on: October 18, 2005, 09:12:30 AM »

Thanks for the advice.  The problem is the varnish that is stuck all over the inside of the carb. 

Anyway, I basically did what you said using a can of gumout and an air compressor.  After I put it back together and installed it, the bike started on the first pull.  I am very impressed with polaris. 
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« Reply #3 on: October 18, 2005, 09:35:28 AM »

Glad it worked out for you.  When I know my quads are gonna sit for a while I'll either turn the gas off and let it run dry or drain the bowl after I get done riding. -Mark
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92' LT250R Quadracer
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"When this baby hits 88 mph, you're gonna see some serious $%#!" - Christopher Lloyd
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« Reply #4 on: October 18, 2005, 10:47:52 AM »

On an old generator carb, I used acetone. Got a small metal bowl & a brush, took out all the plastic and cleaned all the metal parts. Blew the holes out and worked like brand new.
« Last Edit: October 19, 2005, 10:09:11 AM by Moose » Logged

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ar963
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« Reply #5 on: October 19, 2005, 09:33:45 AM »

Does the acetone dissolve the varnish ?
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« Reply #6 on: October 19, 2005, 10:05:19 AM »

Does the acetone dissolve the varnish ?

Yes, almost instantly, very little scrubbing needed.

Need to remove all soft parts though, will dissolve plastic. Not sure about rubber, I cleaned the float seat by itself quickly not to harm the soft seat.
« Last Edit: October 19, 2005, 10:08:01 AM by Moose » Logged

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ar963
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« Reply #7 on: October 20, 2005, 09:50:46 AM »

Thanks,  I will definately try acetone next time.  No more scraping !!!!!!
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« Reply #8 on: October 20, 2005, 11:05:49 AM »

Thanks,  I will definately try acetone next time.  No more scraping !!!!!!

The old carb cleaners were pretty good, but the newer ones are environmentaly friendly, bs, don't work very well. They do some cleaning, but not much.

Acetone is very hot, will take the collor right off your dash board in an auto. Don't use to remove velcro adhessive from dash, took the collor off right down to the plastic under it, quickly to. Very good cleaner though.
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« Reply #9 on: October 20, 2005, 11:14:03 AM »

brake cleaner....and wear safety glasses....LMFAO...
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« Reply #10 on: October 24, 2005, 04:26:44 AM »

The rubber parts strech and deform when I use carb cleaner. I started using rubbing alcohol and eletrical contact cleaner.
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