enrichment circuit in the bowls..

alright, I've cleaned a few sets of carbs and didnt have much trouble after the very first time, but I've got a set now I cant get the enrich circuit well in the bowls cleaned out. the little one you shoot the carb spray in and it should shoot a stream through the other side of the hole. But nope all 4 are clogged on this set. I've left them in carb bowl cleaner for a week. I've used welding tip rod cleaners and got some, but not enough, Ive boiled the bowls and tried again with the tips, but still cant get the carb cleaner to spray through them.... AHHHHH!! What's next....

 

I was able to get all of mine clean with carb cleaner, pen oil, and an air compressor with a tight fitting rubber nozzle.

 

The smallest guitar metal string (hi-E) could help.

 

You can get the proper size pin drill bit from XJ4ever to carefully clean out those passages.

Ghost

 

1st string E will be too thin. I use a .012 steel string from cutoff's of my instruments. Sometimes I have to use the center core of a .022w string....the winding gives a little more support and allows me to bend the string at a right angle. The cut on the end of the unwound portion acts as a mild drill when I rotate the string with the 'bent' part.

Dave Fox

 

Pull out a single strand from a wire brush and straighten it out. Hold it with a pair of needle nose pliers. That always works for me. I would use a guitar string but I don't play one.

 

I have two guitar strings in my workshop: one is 0.012 inch, the other one is 0.016 inch diameter. Which one would be the more efficient to clean the enrichment circuit?

 

Heat.

GENTLY heat the float bowls in the area of the enrichment wells; allow to cool. Then do it again. Once fully cooled, have another "poke."

If THAT didn't work, try poking at them while hot. This takes a bit of doing, and I wouldn't recommend it if you're working in your living room.

Last resort? Drop them in a coffee can full of gasoline. Wait a few days.

After all, what's IN there to begin with? Old, dried up, varnish made from... 8O

It's an old-school trick. I've seen many a varnished-up Amal resurrected by a week-long soak in that which gummed it up to begin with. But Amals contain NO internal rubber parts; dunking a whole carb is not a good idea with a Mikuni or Hitachi, or any other carb with a butterfly-type throttle and o-rings and rubber bits inside. (All metal carbs were cool but had their own set of issues, trust me.) Parts are a different matter.

I seriously do not recommend this except as a last resort. Wet-setting float levels is dangerous enough, so there's no sense asking for trouble cleaning parts with gasoline.

Oh, and clip that NYLON bristle from your parts-cleaning brush (Auto Parts, $3 if you don't already have one) in a hemostat; then you don't have to keep a grip on things just to hold the bristle.

 

I would use the .012 because:

1. it's smaller
2. that's what I always have loads of

ALSO, FlyGp is doing a really nice CAD imaging of the bowl w/ cutaway to the jet at the bottom of the enrichment tube. So, it will be interesting to see what it looks like. I sent him a bowl to cut up awhile back, so we should start hearing rumblings soon!

dave fox

 

When I shoot Carb Cleaner in the Enrichment Well Jet and don't get the stream hitting me right in the eyes, ... I figure the Metering Jets are clogged with a petrified chunk of dried-up Gas varnish and needs to be opened at both ends to let Carb Cleaner do the job.

I use a shortened #80 (.3429mm ~ .0135") Precision Drill Bit with Masking Tape wrapped around the end of its shank.
I chuck the Bit in a DREMEL Universal Chuck with a Small Bolt used to allow the Chuck to be tightened.
I cover the Bolt with a Rubber Manifold Vacuum Port Stopper.

Using this Tool, ... I manually "Auger" through the Varnish through the Bowls Inside Jet until the Drill hits the side.
Then, I "Auger" through the Well Opening atop the Bowl until I feel the Bit bottom-out.

Once I have an intersecting passageway, ... I spray it out.
Then, ... I fill the Bowl 1/2 way with Carb Cleaner and let it soak overnight.
The next day, when you shoot Carb Cleaner into the Bottom Inside Orifice, the stream of Carb Cleaner exiting the Well Opening will blind you.

 

thanks for the ideas guys. Rick, i ordered a 10 piece #80 bit kit and im going to try your way of "augering"

 

Yup, one of my bowls was like this.
Just like everyone else said, I pulled a strand out of a frayed metal cable and poked the hole clean.
The only hard part is getting enough light into the hole so you can see what you're doing, unless you've got surgeon's hands its a task to get that tiny wire into that tiny hole.

 

This is what I see, an expertly designed gunk trap.

FlyGp

 

Yes, it's an amazingly small and hard to get to hole that's for sure.

I have a mate who is studying Chinese accupuncture and he gave me a couple of needles ... they are just perfect for this because they are long, supported for half of their length and have a little end on them that stops you stabbing yourself

See if you can find a local practicioner who will part with one.

 

The tool I made uses a strand from a wire brush and a 2" piece of stranded copper wire.

The copper wire is stripped over half of its length. The strands are twisted around the strand from the brush, with about 3/16" of the steel wire exposed. Then the length of copper wire is soldered to stiffen it and hold the steel wire in place.

The insulation on the end makes a convenient handle to twist it between the fingers to auger the hole.