2V help needed

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DesertRat

DesertRat

Leading edge boomer
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The carburator on my 273 is a Ball & Ball.
It has been rebuilt by my mechanic but has
not performed. Now it is flowing fuel out the top
like the float wont hold and loading up & flooding
out at idle. Can this be tuned or do I need to replace
it with another 2v carb of another brand, and if so what
should I look for.
Thanks, Rat
 
DesertRat said:
The carburator on my 273 is a Ball & Ball.
It has been rebuilt by my mechanic but has
not performed. Now it is flowing fuel out the top
like the float wont hold and loading up & flooding
out at idle. Can this be tuned or do I need to replace
it with another 2v carb of another brand, and if so what
should I look for.
Thanks, Rat
Click to expand...

Need to check your float first and make sure, it floats. Brass floats can spring a leak and fill with gas and sink. And composites can become saturated. It it checks out good,make sure there is no trash in the needle and seat and reset the float level. Those are pretty simple carbs.
 
I got my carburator apart tonight with the help of my 67 shop manual.
The floats have liquid in them and when I put them in water to float,
they partially sink fulcrum point down and more on the left than the right
float. BUT, they do not leak any liquid out of them and appear to be tight.
Do I need a new float assy or can this one be fixed? Or are they supposed to be this way. The symptoms of the low rpm flooding match this scenario perfectly.
Suggestions???? Rat
 
they should not have any fuel inside them. they are cheap so just get a new one and reset the level. also look at the needle and seat while you have it apart like SG recommended.
 
DesertRat said:
I got my carburator apart tonight with the help of my 67 shop manual.
The floats have liquid in them and when I put them in water to float,
they partially sink fulcrum point down and more on the left than the right
float. BUT, they do not leak any liquid out of them and appear to be tight.
Do I need a new float assy or can this one be fixed? Or are they supposed to be this way. The symptoms of the low rpm flooding match this scenario perfectly.
Suggestions???? Rat
Click to expand...

That is a mystery I can't explain, They have fuel in them but they don't leak from the inside out. But no they're not suppose to have fluid in them, that is why your carb is flooding. See if you can find a new one and thta should take care of the flooding issue.
 
I hope I can buy a new float today. I drilled the old one and drained the gas out of the float but now it is useless. I could try to fix it but it wouldn't answer the question of how the fuel got in there in the first place. My local NAPA shop found me the rebuild kit and showed a number for the float but a lot of those numbers are obsolete. May be searching--------
Rat
 
Gas will get in over time (years) through tiny pinholes where the seam is soldered. Changes in barometric pressure and altitude will "suck" the fuel in. It won't come back out because the holes are so small that air can't get back in to displace the fuel. Think of how a tire loses pressure over time. You can dunk it in water and never see a bubble but after 6 months or year, the air does seep out very, very slowly.
 
I wish I could explain the pressure diferential in simple terms. Ever had a tire that would leak from 35 psi down to 15 psi but never go completely flat ?
Anyway.. that pressure factor is what forced fuel into the float and let some of the air out of it. The fuel wouldn't leak out again with the float just laying in a neutral atmosphere.
Parts for these older carbs are nearly impossible to find. Your best bet is find another whole carb. A 318 2 barrel will work on a 273 just fine.
 
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