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700 Class Nitro Helicopters 700 Class Nitro Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 10-15-2011, 09:21 PM   #1 (permalink)
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Default Ys 91 sr3ds fuel problem
So my ys91 is acting up. For no reason the motor seem not to get enough fuel even though the tank is completely sealed and with constant pressure .any suggestion?
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Old 10-15-2011, 09:36 PM   #2 (permalink)
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What symptoms is it showing related to "not enough fuel"?
Are you certain your tank is holding good pressure?
You should get a nice strong pshhht noise when vented after the engine runs a few seconds.

Anytime I have any starting/running issue with a YS I check the check valve operation first.
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Old 10-15-2011, 10:11 PM   #3 (permalink)
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yeah, i got a loud pshhhhhttttt everytime i release the valve but it seems like there is something in the fuel line that obstruct the fuel from flowing. i re[laced the whose fuel system( tank, fuel tube,filter .etec) but the problem persists
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Old 10-21-2011, 01:52 PM   #4 (permalink)
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just from the check valve!!!! buy another check valve!!!
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Old 10-21-2011, 10:42 PM   #5 (permalink)
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Quote:
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just from the check valve!!!! buy another check valve!!!

The check valves can be disassembled for cleaning, so rarely a need to replace.
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Old 10-22-2011, 09:33 AM   #6 (permalink)
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just from the check valve!!!! buy another check valve!!!
why the check valve because i have pressure in the tank?
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Old 10-22-2011, 07:06 PM   #7 (permalink)
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try to pull out both needle and pump the fuel in. Let the fuel flow out from the both needle hole,it's work for me always.

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