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HelicopterEngines Plugs Mufflers Fuel › YS .61 Needle Seal Inquiry
01-14-2011 09:57 PM  7 years agoPost 1
jw637362

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golden, colorado-usa

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I have a ys .61 ST
It has The Hover needle and High end needles.

Can someone tell me how many o-rings are on the High end Needle Seat.
(The part that permenantly threads into the carburator and stays there)
Highlighted in the image.

It shows 2 on the Hover needle but does not expand on the High End seals required.

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01-14-2011 10:41 PM  7 years agoPost 2
JuanRodriguez

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The Villages, Florida

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jw

I looked at my operator's manual for the 61 ST and the 61 ST-2 and they BOTH call for one "O" ring for the high speed needle....

I don't have either motor anymore otherwise I would pull the needle to confirm....

But the diagram clearly shows one and the part numbers also show just one.

Been there, done that and old enough to know better.....

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01-14-2011 11:30 PM  7 years agoPost 3
jw637362

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golden, colorado-usa

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Thanks Juan for the Info.

Clarification - When you say "the Diagram cleary shows 1". Are you looking at the Needle or are you looking at the needle seat. My manual does not show any gaskets in the Diagram for the High Needle Seat' Highlighted in yellow, but does show 2 on the Hover needle seat.
The Needle itself shows 1 O-ring.
I guess the worst that can happen is it wont run correct, then ill know.
Ill take a picture of the actual part in my hand in question and post that later on.

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01-15-2011 12:28 AM  7 years agoPost 4
JuanRodriguez

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The Villages, Florida

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I'm referring to the one "O" ring that is shown in the diagram....it goes onto the needle itself.....that is for the "high speed" needle, which is the one you are questioning..... The "seat" for that needle is NOT removable, unlike the "hover needle seat" assembly which has TWO "O" rings for installation into the carb assembly.....The actual hover needle, however, has only ONE "O" ring, just like the high speed needle....

Hope all that makes sense.....

Been there, done that and old enough to know better.....

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01-15-2011 01:48 AM  7 years agoPost 5
jw637362

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golden, colorado-usa

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Juan - Yes, Makes Sense.

Mine comes out threaded and required to Rebuild / retune the carb. with new gaskets.
I need to know if their is a gasket on the end of the High Speed Needle seat. I have it Boxed in red. This is where I am confused as the Diagram does not show it removed as you state. But it is removable.

I have the text backwards, The shorter one is the High Speed needle

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01-15-2011 05:24 PM  7 years agoPost 6
JuanRodriguez

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The Villages, Florida

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Hummm

I can see why the confusion.... it certainly "looks like" there should be one in that groove at the end of the needle....if you're trying to put one there and it's getting ripped off upon installation, then maybe no ring belongs there...

But, that is just speculation....I think the best thing to do is to call Richard at YS Parts and Service....here is their contact info:

http://www.ysengines.net/contact/

I would suggest calling vs sending an email. Richard is very nice and I'm sure he will clear up any confusion....

Let us know how you make out !

Been there, done that and old enough to know better.....

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01-16-2011 01:33 AM  7 years agoPost 7
alfred

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Australia, New South Wales, Mid North Coast

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I need to know if their is a gasket on the end of the High Speed Needle seat. I have it Boxed in red. This is where I am confused as the Diagram does not show it removed as you state. But it is removable.
You owe me boy

I have a YS61ST-2 sitting on the shelf, so I pulled down and checked the High speed needle assembly (short one).
Yes
It DOES require an "O" ring at the end. It's a red one.

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01-16-2011 01:42 AM  7 years agoPost 8
JuanRodriguez

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The Villages, Florida

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alfred,

That was nice of you to do that in order to clear it up...

Would you happen to have your operator's manual ?? I have the manual for both the ST and the ST-2 and neither manual shows that needle assembly to be "removable" . It obviously is.....

And neither manual show the part number for that needle valve assembly or the part number for that "O" ring in question.....

I sure would like to know what the mystery is !!

Perhaps there are different or "updated" versions of that motor ???

Been there, done that and old enough to know better.....

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01-16-2011 01:54 AM  7 years agoPost 9
alfred

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Australia, New South Wales, Mid North Coast

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Give me 5 minutes...just checking .....

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01-16-2011 02:12 AM  7 years agoPost 10
alfred

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Australia, New South Wales, Mid North Coast

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Can't find the particular manual at the moment, but it's around somewhere, just put away "safe"

Anyway..
Just checked the manuals of the YS80, YS91ST...they are all the same diagram and none show an exploded view of the High speed needle assembly.

Me thinks that Yamada might be going cheap on the money spend for their drawings LOL

This is the original YS parts package that you need to order for the "O" rings: "YS4160"

Order at least a couple of bags to have some spare.
You need the larger, but thinner walled "O" ring for the end of the high speed assembly that screw into the carby body.

Incidently, it's the same as used in the hover needle assembly.

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01-16-2011 02:29 AM  7 years agoPost 11
JuanRodriguez

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The Villages, Florida

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This is the original YS parts package that you need to order for the "O" rings: "YS4160"
Yup..... the funny thing about it is that the pkg you refer to has FIVE "O" rings

If you add up all of the "O" rings actually needed (including the idle needle) that would be SEVEN !!!

Been there, done that and old enough to know better.....

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01-16-2011 02:31 AM  7 years agoPost 12
jw637362

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golden, colorado-usa

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Wow missed some Posts - Appreciate the info on the contact at YS!

Alfred, You went above and beyond. Thanks so much for checking that out.
I also checked the other manuals and they all show the same drawing for multiple sized engines - all without the High Speed Seat removed.

I currently have the 4mm x 1mm O-rings that they supply in the kit.
now if I can get one to go in....

Thank you Juan and Alfred for the assistance here.
Seriously helped!

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01-16-2011 02:36 AM  7 years agoPost 13
JuanRodriguez

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The Villages, Florida

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No problem....

I hope you get things sorted out and the motor running smoothly !

Been there, done that and old enough to know better.....

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