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Pilot fuel screw tip stuck

  • Thread starter Thread starter Pendulum
  • Start date Start date
P

Pendulum

Guest
For those of you that didn't see my last thread... All 4 of my pilot fuel screws had their tips broken off in my carb bodies. I used some dental picks to get 3 of the 4 out. I spent a good 15-20 minutes on one carb last night and can not get that last tip out. It's not visible from the top any more (not poking through).

Is it ok to just install the new screw and leave that tip broken off in there? If not, does anyone have any tips to get that thing outta there? I've tried PB blaster, a huge assortment of tools, and a little swearing...
 
You have got to get that bit out. Do a search - there are 101 ways of getting the blighters out. Small punch sounds like it might be called for.
 
hampshirehog said:
You have got to get that bit out. Do a search - there are 101 ways of getting the blighters out.
Click to expand...


I've tried every method I've seen, but I'll dig around some more. The only thing I haven't done is heat... I don't have a torch, but I'll buy one if it'll do the job.
 
Try boiling the carb in a pan of water with a drop of detergent added (just a drop or it'll all be over the floor). The heat and very process of boiling often helps shift obstinate things made from 2 different metals.
 
Hi,

Yes, that last tip has to come out. Is there a machine shop around where you can take it? Perhaps they can carefully drill it out.


Thank you for your indulgence,

BassCliff
 
BassCliff said:
Hi,

Yes, that last tip has to come out. Is there a machine shop around where you can take it? Perhaps they can carefully drill it out.


Thank you for your indulgence,

BassCliff
Click to expand...

I took the carb body into work to try to get some ideas from our lead fabricator, and he said "That's the fuel screw, right?" and snatched the carb from me. He said "Just give me some time." and walked off. An hour later I had the carb back, with the screw removed and cleaner than when he took it.

And all I wanted was some advice...
 
Pendulum said:
I took the carb body into work to try to get some ideas from our lead fabricator, and he said "That's the fuel screw, right?" and snatched the carb from me. He said "Just give me some time." and walked off. An hour later I had the carb back, with the screw removed and cleaner than when he took it.

And all I wanted was some advice...
Click to expand...

OK, but how did he do it? inquiring minds want to know.
 
Hi,

Well, I think you should buy your friend a beer!
beer2.gif


Knowing a good machinist is a good thing. It sounds like you work at a pretty neat place.


Thank you for your indulgence,

BassCliff
 
It's great that your friend got the tip out. I think though, that the tip of those screws are tapered, and that the shape of the 'hole' they're in is also tapered to match, and that the relationship between the two is important to fuel delivery. If the aluminum hole is damaged (say by an inexperienced mechanic turning the steel screws down hard and snapping off the screws) that adjustment will be impossible.
This is why all carb adjustments involving screws begin with the phrase "turn the screw in until it JUST bottoms".
Please let me know if this turns out to be the case with yours?
And, good luck.
S.
 
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