Tetra One-Way Valve  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> YS Engines Support >> Tetra One-Way Valve
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Tetra One-Way Valve - 7/11/2008 6:26:29 PM   
wessco


 

Posts: 352
Joined: 4/16/2005
From: Summerville, GA, USA
Status: offline 		Anyone had any experience with the Tetra one-way valve? I thought I'd post my experience, to see if anyone else has had the same.

YS .63 FZ-s. Maybe 1/2 Cooper's 30%. New YS plug. Was running fine, until the prop decided to try to eat the fuel lines. This threw the one-way valve somewhere out of my line of sight, so I had to put another valve in. All that I had was a Tetra unit. I could not get the engine to run correctly. Loaded up and found the original one-way valve. The next time to fly, I re-installed the original unit and the engine was back to it's reliable self. So my conclusion is this.......throw away the Tetra units and use the YS units. Anyone else had any good, bad or otherwise experience with the Tetra one-way valve?
       Post #: 1

RE: Tetra One-Way Valve - 7/11/2008 6:32:51 PM   
petec



Posts: 660
Joined: 1/26/2002
From: Beaver Falls, PA, USA
Status: online 		I've never heard of anyone having luck with anything but the YS one way valve myself included. I dropped a YS valve out at the field and couldn't find it so I grabbed a one way valve I had in flight box (it was red and white) and my always reliable 63 turned into a nightmare and almost cost me a plane. I put a YS valve in when I got home and all was fine after that.

Lesson learned. I always have a spare YS valve in my field box.

_____________________________

Team Black Magic
Pattern Junkie..Revver Brother #82..Gear Head

(in reply to wessco)
       Post #: 2

RE: Tetra One-Way Valve - 7/11/2008 6:35:57 PM   
OldFart1


 

Posts: 237
Joined: 12/21/2005
From: Lakewood , CA, USA
Status: offline 		Same here - tossed the Tetra

_____________________________

Jeff

(in reply to petec)
       Post #: 3

RE: Tetra One-Way Valve - 7/11/2008 7:00:45 PM   
mjfrederick


 

Posts: 593
Joined: 8/18/2006
From: Baton Rouge, LA, USA
Status: offline 		The problem with the Tetra is it is mainly designed to prevent liquid backflow. While air bahaves as a fluid, it is not dense enough to force the metal ball back to close off the valve quick enough for YS purposes. The YS valve uses a small silicone flap to prevent backflow, which responds equally well to liquid or air. Stick with the YS valve for al YS engines which require tank pressure to force the flow of fuel.

< Message edited by mjfrederick -- 7/11/2008 7:01:08 PM >

_____________________________

mjfrederick AMA 275874 NSRCA 4134
Maybe the Dingo ate your baby

(in reply to OldFart1)
       Post #: 4

RE: Tetra One-Way Valve - 7/11/2008 7:03:27 PM   
wessco


 

Posts: 352
Joined: 4/16/2005
From: Summerville, GA, USA
Status: offline
quote:

ORIGINAL: mjfrederick

The problem with the Tetra is it is mainly designed to prevent liquid backflow. While air bahaves as a fluid, it is not dense enough to force the metal ball back to close off the valve quick enough for YS purposes. The YS valve uses a small silicone flap to prevent backflow, which responds equally well to liquid or air. Stick with the YS valve for al YS engines which require tank pressure to force the flow of fuel.



You're right. I just checked. I was thinking the the YS valves had the ball in them. No more "off brand" one-way valves for me.

< Message edited by wessco -- 7/11/2008 7:10:39 PM >

(in reply to mjfrederick)
       Post #: 5

RE: Tetra One-Way Valve - 7/12/2008 11:15:18 AM   
XMANS


 

Posts: 82
Joined: 8/8/2004
From: HOPPERS CROSSING VICTORIA, AUSTRALIA
Status: offline 		You only use the Tetra on petrol engines, keep the YS ones for YS.

(in reply to wessco)
       Post #: 6

RE: Tetra One-Way Valve - 8/13/2008 5:06:42 AM   
Magna


 

Posts: 953
Joined: 10/25/2002
From: Malaysia, MALAYSIA
Status: offline 		what about a replacement if you lost it?

(in reply to XMANS)
       Post #: 7

RE: Tetra One-Way Valve - 8/13/2008 1:46:29 PM   
huey-pilot


 

Posts: 300
Joined: 7/12/2002
From: Enterprise, AL, USA
Status: offline 		Central Hobbies have replacement valves and YS parts.

(in reply to Magna)
       Post #: 8

RE: Tetra One-Way Valve - 8/13/2008 4:45:47 PM   
petec



Posts: 660
Joined: 1/26/2002
From: Beaver Falls, PA, USA
Status: online
quote:

ORIGINAL: Magna

what about a replacement if you lost it?


Since you are in Malaysia check with whom you are getting the engine from just for the sake of getting it quickly. If the shop you are dealing with sells a lot of YS engines they will likely have spares or be able to order them for you.

_____________________________

Team Black Magic
Pattern Junkie..Revver Brother #82..Gear Head

(in reply to Magna)
       Post #: 9

RE: Tetra One-Way Valve - 8/13/2008 5:52:11 PM   
42etus



Posts: 129
Joined: 7/8/2005
From: La Pine, OR, USA
Status: online 		Toss the Tettra. The YS valve is the only one to use.
Paul

_____________________________

I know right from wrong.....Wrong is the fun one

(in reply to wessco)
       Post #: 10

RE: Tetra One-Way Valve - 8/14/2008 3:35:15 AM   
Magna


 

Posts: 953
Joined: 10/25/2002
From: Malaysia, MALAYSIA
Status: offline 		Petec

I think I will put in an extra order for the valve with my engine.

(in reply to 42etus)
       Post #: 11

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> YS Engines Support >> Tetra One-Way Valve
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