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HelicopterEngines Plugs Mufflers Fuel › YS91 SR / SB19 combo needle valve settings?
09-15-2007 12:26 AM  10 years agoPost 1
bmoranx

rrNovice

Michigan

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All - Can those of you running the YS91SR and SB19 pipe combo tell me where your needle valves are set? I am currently running mine per the instructions and my engine seems to be verrrrry rich. I am gulping down 30% fuel at an alarming rate. I could start to lean things out a bit but I figured I'd see what others have their needles set at first. Any help would be greatly appreciated....

thanx/Bruce

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09-15-2007 02:44 AM  10 years agoPost 2
airdodger

rrElite Veteran

Johnston USA

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If you could use the same needle settings as everyone else they would just set the jetting at the factory. Other peoples settings are useless unless they are in the same place as you, with exactly the same equipment and fly just like you, even then there could be differences. Also you have no way to know if the person that answers the question has good skills. If you are using a ninety I think you probably already know how to tune an engine, you already know it is too rich. A couple of clicks can be the difference between a powerful engine or a dog.

Chris

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09-15-2007 03:29 AM  10 years agoPost 3
bparro

rrVeteran

indianapolis,in

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the SR does use more fuel than an os sz. I get about 1.5 to 2 minutes less flight time than my old os sz. My needles are 1.5 on mid and about one turn on high. youngblood 30 percent fuel.

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HelicopterEngines Plugs Mufflers Fuel › YS91 SR / SB19 combo needle valve settings?
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