rickc
Senior Member
Posts: 135
Loc: Green Valley IL. USA "Tor...
Reg: 05-13-01
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 01-13-02 11:29 PM - Post#3726
In response to mudbogger2
While your filling the tank are you blocking off the supply to the carb with a fuel line clip or hemostats? I see I'm going to be eating my words. It can't be a major issue. Seems like it had to be the check valve or the diaphragm or plunger. Anyway, something is broken. If all parts are working properly the YS should not flood and will hold pressure for hours. If you run any type of after run oil and it's petroleum based you will cause damage to the diaphragm. "P" Rick
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mudbogger2
Member
Posts: 65
Loc: Hoschton, Ga.
Reg: 11-22-00
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 01-14-02 01:45 AM - Post#3727
In response to rickc
I always filler up from the fuel inlet going to the carb. Never used after run oil just ran it dry at the end of the day. Hopefully I will see what is going on when I tear it down. Never been inside one of these. Looks like it will be fun.
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rickc
Senior Member
Posts: 135
Loc: Green Valley IL. USA "Tor...
Reg: 05-13-01
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01-14-02 05:19 AM - Post#3724
In response to Dyehard
Excellent point.Rick
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Dyehard
Senior Member
Posts: 272
Loc: Richlands, Va.
Reg: 01-27-01
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01-14-02 01:18 PM - Post#3728
In response to mudbogger2
Two things to look for, something is holder the regulator valve open, such as a piece of foreign matter, or the diaphram has a hole in it. Either one would allow fuel to go into the engine unobstructed.
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rickc
Senior Member
Posts: 135
Loc: Green Valley IL. USA "Tor...
Reg: 05-13-01
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01-14-02 06:10 PM - Post#3730
In response to Ergo60
That’s the way they are intended to work if all it correct. My theory has proven correct at the field a couple times on plank engines. Changed the check valve and things were back 100%. Apparently I made a bad call on this one. Neither my ST-2 nor my ST-3 will leak fuel with pressure left in the tank. The plunger will have to be hanging open for some reason to allow flow of fuel. I never use castor, as that is bad for YS. I can't think of anything else besides debris in the regulator or castor has it gummed if castor was used.Rick
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mudbogger2
Member
Posts: 65
Loc: Hoschton, Ga.
Reg: 11-22-00
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 01-15-02 02:18 AM - Post#3731
In response to rickc
I think I found the problem. After tearing the engine down I found the little lever inside the diaphram was moving too far. A small piece of silicone?? was supposed to be glued in place to keep it from traveling too far I think. Anyhow it had fell down under the little lever! I repositioned the piece of silicone and will try it in the morning if it doesn't work I will probably get a new regulator. <fingers crossed>
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Ergo60
Senior Member
Posts: 186
Loc: South Haven,MI USA
Reg: 09-19-01
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01-15-02 05:39 AM - Post#3729
In response to Dyehard
OK, I have to jump in on this one. I use a YS61ST2 in my Ergo 60. And while I have only used it for a year I have NEVER had it leak out the carb, and since I fly mostly at my house I have on numerous occasions left the pressure in the tank. I go out after a few days, and the pressure is still there, and no fuel has leaked into the carb. I have NEVER seen it happen on the bench or at the field. Like I said this is the first year I have used the YS, so I was not used to having to release the pressure, so it went pressurized many times, and like stated before I have NEVER had it leak into the carb. Maybe I am super lucky, or maybe the planets are aligned just right. The only thing I have had happen is a main fuel tank split at the seam, but that was because I was using the stock flimsy foam for the tank around the frame, I have since then switched to small rubber hose that I slit to fit over the frame. This is not gospel, but it is what I have observed.
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Dyehard
Senior Member
Posts: 272
Loc: Richlands, Va.
Reg: 01-27-01
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01-15-02 12:33 PM - Post#3732
In response to mudbogger2
The piece of silicone that you describe is the plug the stops the fuel by covering the inlet tube. The glue the holds it in place must have broken loose. Just moving it back in place won't work, it will just move again, and I don't know of any commercially available glue that would hold up emmersed in fuel. You will have to replace the whole lever, if available, or the complete regulator. It the engine still under warranty?
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