Author Topic: 20r carb on the frits... REBUILD SUCCESS!  (Read 4024 times)

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H8PVMNT

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20r carb on the frits... REBUILD SUCCESS!
« on: Jan 15, 2011, 10:00:03 PM »
My stock 20r carb quit working on the trail today.  The choke flap is completely limp and there is a ton of fuel gushing out of the two tubes so it will start and then instantly flood itself in a matter of seconds.  I have the rebuild kit with a new float and everything sitting in the garage but I'm thinking I need to order a new water choke as well...  Any experience working with this carb or this issue?

I really don't want to swap on a weber.


Also: The solenoid thing on the back of the carb with the hot wire seems to be working or at least clicks when the ignition is hot.
« Last Edit: Jan 28, 2011, 09:02:16 AM by H8PVMNT »
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RABIDYOTA

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Re: 20r carb on the frits... Floods, limp choke.
« Reply #1 on: Jan 15, 2011, 10:39:29 PM »
well it don't run now  so pull the carb and inspect   needle stuck float sunk ????

H8PVMNT [OP]

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Re: 20r carb on the frits... Floods, limp choke.
« Reply #2 on: Jan 16, 2011, 08:05:25 PM »
Yep I'm going to tear it down this week and see how bad I can do...
“I would rather wake up in the middle of nowhere than in any city on earth.”
– Steve McQueen

"Except for maybe Seattle."  -H8PVMNT

"I plan to hit 300k in this truck"  :)bestgen4runner

 "I'm jealous of your shop. It has concrete and doesn't smell like pickles like the old shop  "  300K

H8PVMNT [OP]

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Re: 20r carb on the frits... Floods, limp choke.
« Reply #3 on: Jan 17, 2011, 12:53:56 PM »
Picked up another working stock carb for $10 so at least I can take my time.
“I would rather wake up in the middle of nowhere than in any city on earth.”
– Steve McQueen

"Except for maybe Seattle."  -H8PVMNT

"I plan to hit 300k in this truck"  :)bestgen4runner

 "I'm jealous of your shop. It has concrete and doesn't smell like pickles like the old shop  "  300K

H8PVMNT [OP]

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Re: 20r carb on the frits... Floods, limp choke.
« Reply #4 on: Jan 28, 2011, 09:01:53 AM »
Finished puting my carb back together this morning and it runs like a top!  I found lots of neat suprises when I took the carb apart...  The float had some porosity to it on one side and aparently was taking on fuel and sinking to the bottom of the bowl letting gas just hose past the needle and flood the carb.  That was no big suprise.

The real fun was the stuff I found from whoever rebuilt it last.  They must have been drunk!  The spring on the accelerator pump was on the wrong side so it was doing the exact oposite of what it was suposed to and there were several little rubber gaskets installed in places they weren't suposed to be so they were gapping the top (bowl cover) part of the carb about 1/32nd off of the bottom half where the two surfaces are suposed to be sealed together with a gasket.  Essentially the fuel could splash from the bown dirreclty into the top of the carb where it is not suposed to.  I always had a ton of afterfire when I let off the gas and now I have none.  I can only assume that the vaccuum when I let off was sucking gas through this crack and causing it to run rich most of the time.

Anyway it was pretty easy to rebuild overall.  There were alot of peices but I made myself a map on a big slab of cardboard and layed them all out in numerical sequence.  Mostly you just take everything apart and clean it and put in a few new balls, springs and other bits.
“I would rather wake up in the middle of nowhere than in any city on earth.”
– Steve McQueen

"Except for maybe Seattle."  -H8PVMNT

"I plan to hit 300k in this truck"  :)bestgen4runner

 "I'm jealous of your shop. It has concrete and doesn't smell like pickles like the old shop  "  300K

RABIDYOTA

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Re: 20r carb on the frits... REBUILD SUCCESS!
« Reply #5 on: Jan 29, 2011, 09:18:15 PM »
 :beerchug:

 
 
 
 
 

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