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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › YS 50 fuel line routing
01-14-2009 12:16 AM  9 years agoPost 1
AgentOrange

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Jacksonville, Florida

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I have run OS motors forever. This is my first ys and it does have the pump on the crank case. my question is this how do i route my feul ine for this motor? I thought i had them right but the engine will not start and no fuel is flowing throught the line when i do try to crank it so that tells me that my lines are wrong. thanks for your help.

Trying not to put them in the dirt.

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01-14-2009 12:28 AM  9 years agoPost 2
george0079

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USA

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The plumbing diagram is in the manual.

But basically it geos... from the preasure nipple on the backplate to the check valve (Make sure the valve is flowing the right direction.... And, the tubing to the valve is the proper length. this is also in the manual.) From the check valve to the preasure port on the fuel tank. The rest is normal plumbing.

Hell... I can fix that.
Uh oh..
Nope.
It's ***ked!!!
RE-KIT!!!!!

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01-14-2009 12:29 AM  9 years agoPost 3
AgentOrange

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Jacksonville, Florida

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i got the motor 2nd hand and they dont have the manual.

Trying not to put them in the dirt.

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01-14-2009 12:32 AM  9 years agoPost 4
baby_zyklon

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Singapore

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http://www.yspartsandservice.com/pdf/YS50ST.pdf

Fuel should flow through after you crank. Give it a few crank and you should be able to get at least a little bit of pressure in your tank.If not, something is not right somewhere. And yes, make sure the check valve is going in the right direction.

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01-14-2009 01:07 AM  9 years agoPost 5
JuanRodriguez

rrProfessor

The Villages, Florida

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This is my first ys and it does have the pump on the crank case.
Just in case you're interested, your YS motor does not have a "pump" ..... The tank is pressurized via pulses from the crankcase (no pump involved) and then the fuel is delivered to the carburator under pressure where it is regulated for use by the carb.....The check valve between the motor and the fuel tank must be oriented correctly so that it prevents the pressure built up in the tank from bleeding back to the motor.....

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01-14-2009 11:39 AM  9 years agoPost 6
AgentOrange

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Jacksonville, Florida

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Hey fellas thank you for all the info. I found the problem last night after about an hour of messing with it. i ran the carburator line to my Trex 600 and fired it up to eliminate the tank side of the house and my Trex ran like a champ. I narrowed it down to the motor and thought about it for a minute and checked the neddle setting and they had run the neddle all the way down. turned it out 2 turns and the motor cranked right up. I felt like a dumb as* for not checking that first but i learned and that will be the first thing i check next time this happens. Like i said thanks agian for your help.

Trying not to put them in the dirt.

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01-14-2009 03:44 PM  9 years agoPost 7
BarracudaHockey

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Jacksonville FL

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Experience is what you get right after you need it

Andy
AMA 77227
http://www.jaxrc.com

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01-14-2009 07:06 PM  9 years agoPost 8
AgentOrange

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Jacksonville, Florida

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Thanks andy

Trying not to put them in the dirt.

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