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11-20-2015 01:19 PM  22 months agoPost 1
bohelinut

rrNovice

Hartselle,AL

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Hey guys Ive got a big problem , when running , idle. raw fuel is coming out of the carburater throat. anybody have this problem? Check valve is good, I never had any trouble with this engine in the past

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11-20-2015 04:23 PM  22 months agoPost 2
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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The regulator is stuck open, the regulator's diaphragm has a hole in it or you may not have reassembled it correctly (if you rebuilt it lately).

If it is stuck open or there is debris in there, you may have some luck removing the fuel line between the regulator and the carb, and then forcing some fuel through the regulator.

If the diaphragm has a hole, you need to replace it.

Personally, I would pull off the regulator and inspect it carefully.

BTW: If you used a petroleum based after-run oil, that would eat the diaphragm.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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11-20-2015 08:39 PM  22 months agoPost 3
bohelinut

rrNovice

Hartselle,AL

My Posts: All  Forum  Topic

YS 91

Hmmmm thanks for replying, some really good input there, I guess Ill take the engine out and take apart the regulator, thanks for your input

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11-20-2015 09:23 PM  22 months agoPost 4
crflyer

rrApprentice

Maine

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Try leaning the low end needle a little first before you take it all apart, could be its set to rich.

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06-07-2016 11:17 PM  15 months agoPost 5
FLYERCLD

rrVeteran

Proctor, Arkansas

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Hi Bohelinut, did you get your problem fix? How is it running? I have the YS91SRX, and had a problem with settings so far I think I got it running good (idle).

If you have the same motor what are your settings.

Charles

MA Whiplash Nitro
Avant Aurora X2
OS 91 HZ
YS120
VBAR BlueLine
DX18
AMA L504443

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06-08-2016 05:39 PM  15 months agoPost 6
FLYERCLD

rrVeteran

Proctor, Arkansas

My Posts: All  Forum  Topic

Update

YS91SRX is idling great I used a OS8 plug and I had to come out about 5 clicks on the high side. I still will be getting some Enya 3 plugs.

After a 3 min flight, I check the motor back plate and it was ok, I could hold my finger on it, no burns. I will still keep a look out for over temp conditions.

Charles

MA Whiplash Nitro
Avant Aurora X2
OS 91 HZ
YS120
VBAR BlueLine
DX18
AMA L504443

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06-14-2016 11:39 AM  15 months agoPost 7
FLYERCLD

rrVeteran

Proctor, Arkansas

My Posts: All  Forum  Topic

Update

I got my engine running great. Enya #3 or #5 plug did the job with 30% fuel RotorRage. Setting are hover 1.75 turns out, idle 1.25 and high 2.0 turns out with 3clicks out.

My engine is running great!

MA Whiplash Nitro
Avant Aurora X2
OS 91 HZ
YS120
VBAR BlueLine
DX18
AMA L504443

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