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Old 11-09-2019, 04:55 PM
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Default Leaky Flo-Jet

So I'm trying to figure out why my Flo-Jet is constantly leaking.
It seems to be coming from this little thing on the bottom(see the pic). What is it? Is it a drain for the carb body?
I went through it awhile ago and used fresh gaskets and seals in the float area.
I'll add more info later, can't now.
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Old 11-09-2019, 05:47 PM
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Hmm, maybe I installed the float needle pin wrong.....
I might end up needing to put some gasket maker on the body gasket.
Also it needs a new choke lever....
And so on and so forth....
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Old 11-09-2019, 07:41 PM
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As I understand That is a weeping hole.. it allows the gas to drain when it is flooded, or the float isnt stoping the flow to the bowl.....
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Old 11-09-2019, 07:45 PM
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https://isavetractors.com/articles-1...et-carburetor/
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Old 11-09-2019, 11:11 PM
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That thing in your first picture is a pourous vent filter. It allows air and liquid to pass but no solids. It is working properly. Seems like you have already identified your issue. Hurry up and get it done. I'm still waiting for the video. I fixed a generator and a weed eater yesterday and the neighbors mower all after work...today I took a nap...so stop goofing around!
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Old 11-10-2019, 08:25 AM
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Ideally I would be able to remove the emulsion tube, but to do that I need part# 19280, the carburetor screwdriver, aaaaand it's almost $40!!
The seller is open to offers though, so I'll see if I can lowball it.
If not, I'm just going to have to do it anyway.
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Old 11-10-2019, 10:30 AM
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You need to modify a cheap srewdriver... flatten it out on the sides and grind the tip till it is wider to accomndate the notch of the E-tube...
Here.. watch this..


Also he has some others..
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Old 11-10-2019, 11:57 AM
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A 4 in 1 screwdriver has straight sides. I've used one without modification but it was on a bigger flow-jet, on a 8hp. Not sure if there's a difference.
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Old 11-10-2019, 12:59 PM
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I'll see if any of our screwdrivers will work. Or if I can modify one to work.
Didn't consider modifying a screwdriver!
I'll pull the carb this week and work on it.
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Old 11-10-2019, 01:23 PM
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You guys need to stop using woodworking screwdrivers on your stuff and start using the proper hollow ground screwdrivers for detailed machine work like this. Many of the 4 way screwdrivers have hollow ground bits incorporated in their design which I think is an awesome thing. I own several actually. It prevents me from having to buy a set of expensive gunsmith screwdrivers to get the tip size I need. You can also get a hollow ground bit as in the kind that go into the driver handles but I dislike them personally because they tend to get lost or chance to 'fall out' into the workpiece.

A hollow ground screwdriver in the right width will be all you need to get that jet out. You can buy one at you local parts store on the cheap in the form of a four way as mentioned above. Do some research on hollow ground screwdrivers and you might find you may have one on hand even.

Get back to work.
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Old 11-10-2019, 01:34 PM
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^^I agree.

How about the #@&*ing creeps that use a Philips screwdriver on a Japanese bike? That's kinda harsh it's just lack of knowledge. JIS is the answer to that problem. That and a hand impact.
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Old 11-10-2019, 01:44 PM
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Found this that looks like it might work. https://www.ebay.com/itm/Carburetor-...cAAOSwI8laHkYu
It's hollow ground, too.
I sent a message asking the dimensions of the tip. Maybe it'll work!
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Old 11-10-2019, 01:59 PM
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15 bucks for a screwdriver? You can get an orange 4 way from AutoZone for 5 bucks, I wonder if it would fit in the jet. Anyway, your dime. I don't know what the dimensions are so I can't make the call.
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Old 11-10-2019, 02:21 PM
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Is the said AutoZone one a hollow ground? Just wondering. The hole is pretty small though.
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Old 11-10-2019, 04:04 PM
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Yes, it is...
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Old 11-11-2019, 10:46 AM
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Pulled the carb today and took it apart. Plenty clean(since it auto drains)!
Wow.
It was REALLY warped! Even after filing a bit, I can see light through the cracks! No wonder it leaked! I'm not done yet, but it'll take a lot of good ol' fashioned elbow grease and patience to get it right. I'm just using a fine single cut file, since I still have to be careful not to remove too much material even with this one.
You can compare the shiny filed areas to the dull rough areas. Shiny!
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Old 11-11-2019, 01:46 PM
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Out of curiosity I just measured various intake diameters with a precision caliper. Here's what I found:
Intake port on the engine: Almost 21 mm exactly
Intake manifold inner diameter: About 20 mm
Carburetor throttle bore: 19.35 mm
That, combined with the L shape of the manifold and carburetor, means some pretty significant flow restriction. Not ideal.
But at this point I think I'm going to try to keep this carburetor running. GoPowerSports replied, and they don't do flathead --> Mikuni adapters at all(I think Carsandcameras said they could make them in a video). So I'd either have to make a custom manifold(don't have a welder yet), or buy one of the $50+ ones().
So, back to keeping this carb running.
At least it'll keep with the overall theme of the engine!
Anyways, back to the garage.
BTW - It dropped something like 20 degrees in less than 5 hours. Fun!
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Old 11-11-2019, 03:48 PM
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Alright! I finally got the carburetor body straightened out satisfiably. It took about 3 hours of persistent work, but I think it's finally good enough. Did some gentle bending and lots of filing, but a big plus is that it's SHINY!
I'm still going to put some dabs of gasket maker around the vent passages and the venturi area, but I think that should cure the leaking!
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Old 11-11-2019, 04:55 PM
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Oh my gosh!! This video was a lifesaver! I knew the warped body was a problem, but I'm glad I found this before I put it back together! Just gotta finish modifying a cheap screwdriver then do this!
He literally described my exact problem!
What would be optimal would be to lap the e-tube mating surfaces like Briggs recommends, but I'd need a sacrificial e-tube, and they're not even available anymore on Ebay. Just gonna have to friction lap it.
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Old 11-11-2019, 08:00 PM
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Im surprised you havent heard about these vids... I posted about this guy a while back on my big 14 rebuild... I ended up buying a new carb while I get the old one cleaned and separated properly..
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