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HelicopterEngines Plugs Mufflers Fuel › YS50 Question
08-29-2012 11:20 PM  5 years agoPost 1
Tag1260

rrApprentice

Ohio USA

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Bought a used YS50 and would like to know, is the check valve in the pressure line a necessary thing? Any tips for this engine? All I've ever had are OS's.
Thanks

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08-30-2012 12:02 AM  5 years agoPost 2
TMoore

rrMaster

Cookeville, TN

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Yes, you will need to use the check valve.

TM

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08-30-2012 12:46 AM  5 years agoPost 3
rc3po

rrVeteran

Danville, Illinois

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+1

Also the line from the backplate to the check valve must be the proper length (35mm) for good results and make sure the valve is in the right direction..

Happay Happay Happay...

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08-30-2012 12:48 AM  5 years agoPost 4
Heli 770

rrProfessor

USA.

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You'll also want to make sure the engine to check valve line is 35mm long.

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08-30-2012 08:29 AM  5 years agoPost 5
Tag1260

rrApprentice

Ohio USA

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Thanks for the info. How about after the check valve? Does it matter there?
Thanks again
Tag

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08-30-2012 11:34 AM  5 years agoPost 6
Heli 770

rrProfessor

USA.

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Tag1260

YS manual down page.
http://www.ysengines.net/support/manuals/

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09-01-2012 02:11 PM  5 years agoPost 7
Tag1260

rrApprentice

Ohio USA

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Thanks for the info AND the manual. For some reason I couldn't find a good copy.

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09-04-2012 07:49 PM  5 years agoPost 8
Tag1260

rrApprentice

Ohio USA

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OK. More dumb Q's !!! Is this check valve special for YS or will any check valve work. I bought a used engine and did not get one with it and can get a generic one at the LHS.

Also, do you have to run anything special for fuel?

Thanks again for all the info.

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09-04-2012 11:53 PM  5 years agoPost 9
wifeorheli

rrElite Veteran

reno, nevada usa

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I would assume any would work but how good not sure. I dont know if YS ones only open at a certain PSI or not. Main thing is you need one so the pressure cannot go back into the motor giving you a pressurized tank.

Novarossi Motors U.S.A
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Team Align
GrandRc.com
ZRC U.S.A. "PushGlo, SwitchGlo"

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09-04-2012 11:57 PM  5 years agoPost 10
TMoore

rrMaster

Cookeville, TN

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I would assume any would work but how good not sure. I dont know if YS ones only open at a certain PSI or not. Main thing is you need one so the pressure cannot go back into the motor giving you a pressurized tank
Why do you think it's called a "one way valve"?
OK. More dumb Q's !!! Is this check valve special for YS or will any check valve work. I bought a used engine and did not get one with it and can get a generic one at the LHS.
Also, do you have to run anything special for fuel?
Thanks again for all the info.
What brand of one way or check valve does the LHS carry?

TM

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09-05-2012 01:07 AM  5 years agoPost 11
Tag1260

rrApprentice

Ohio USA

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I believe it's a Fourmost.

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09-06-2012 03:58 AM  5 years agoPost 12
b-blug

rrNovice

Michigan City, IN

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One tip I use is to blow any fuel out of the line after each flight. I also clean the check valve out with rubbing alcohol before I go to the feild. When you blow or suck through it, it should open and close smoothy and not make a "duck call" noise.

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09-06-2012 04:06 AM  5 years agoPost 13
TMoore

rrMaster

Cookeville, TN

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It's very hard to blow through a properly working one way. It's better to put vacuum on it to see if it works.

I'm not familiar with a Fourmost but I would give it a try. It looks like it would work from the website description that I just read.

TM

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09-06-2012 07:37 PM  5 years agoPost 14
Tag1260

rrApprentice

Ohio USA

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How about fuel requirements? I fly 15% now in my OS.

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09-07-2012 12:01 AM  5 years agoPost 15
ch-47c

rrElite Veteran

san jose, ca

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I would use only a YS check valve. I keep a spare since I switched to YS. Interchangeable between different size YS engines. I read somewhere that the valve allows up to 12psi to build in your fuel tank rather than the usually 2-4psi from muffler pressure.

I have 50STs, 60SRs, 91SRs and a bunch of 4-strokes for planks, these YS engines like 30% nitro. I've used Cool Power and Byron's Rotor Rage and they like them both.

Most online stores carry the check valves. Try here.

http://www.ronlund.com/rcheli-prod/...0ST/YS2510.html

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