RunRyder - carb mixture

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Beginners Corner > carb mixture

stanley
Heliman
Location: javea spain

do any pilots have experience of carb setup on my os 37 heli motor , all was going great very responsive rigth through the range then upon landing the motor cut out on idle as though no fuel was gettin through, a quick check and the fuel supply was there, since then ive been trying to get it to run with no sucsess at all can anybody tell me a base carb set up ? im using model technics at 15 %nitro &the ambient air temp at the moment is 34 C

07-20-2008 08:16 AM

BarracudaHockey
rrMaster
Location: Orange Park FL

Break out the book that came with the motor and start there.

If you don't have it its available at http://www.osengines.com

AMA 77227
http://www.jaxrc.com

07-20-2008 12:17 PM

Way2slow
Veteran
Location: Jeffersonville Ga

First, have you tried a new glo plug? If you happen to be running lean, it will eat glo plugs just about as fast as you can stick them in there.

Second, how long have you had the fuel and was it stored in an air tight container. Condesation adds moisture to the fuel and can give you all kinds of problems trying to keep a motor running.

07-20-2008 03:23 PM

Smacka
Heliman
Location: Weedville, PA

You are running lean, and the engine heats up and acts as though it runs out of fuel.

Make sure it is completely cool, richen the fuel mixture and have ball flying.

One word of caution...keep the bird on the ground until you get the mixture set correctly so the engine runs reliably, then let 'er rip

Have a great day!
Smacka

07-20-2008 04:50 PM

tarzan_eb
Heliman
Location: Central Illinois USA

os37

If it won't start I would check glow plug and if its burnt put in another good one and richen your high speed 3 clicks. If its good and won't start richen low speed 2 clicks. if it won't idle richen low speed Really the low speed is fairly easy to set.Set it to what the book says 1mm below top or less then lean it untill you got good transition to high speed and it can idle for 15 - 30 secand still transition good, then set high speed needle to factory setting 1 1/2 usually.I usually set my high speed with a temp gun after low speed is set fly around a little check temp you want to get temp up by leaning high speed to about 180F no higher than 200 f if mine is between the 2 I am happy fly a couple more rounds check temp if hot richen if cold lean.
Remember it's better to richen if your not sure what your engine needs,
I would rather it be slobering rich than lean

Fly it ! Crash it ! Rebuild it ! Repeat as needed !!

07-21-2008 03:47 AM

stanley
Heliman
Location: javea spain

carb mixture

Thanx all for your response, i had just fitted a new OS 8 and initally all was crisp, as for fuel my supply is over 6 months old (past it ? ) so newfuel and a thorough mixture adjust ,will keep all posted

07-21-2008 07:12 AM

stanley
Heliman
Location: javea spain

carb mixture

Just a quick update on my recent problem, got new fuel re checked mix settings (they were spot on )started straight away now purring like a Tiger! prognosis old fuel! thanx to all for accurate input and very happy sky bending to all PS I love my heli again !!!

07-27-2008 07:54 AM

mchammer
Veteran
Location: California,USA

good job!

Peace Through Superior Firepower!!!

07-28-2008 12:14 AM

tarzan_eb
Heliman
Location: Central Illinois USA

Cool

But I wouldn't think 6 month old fuel would cause the problem.

Fly it ! Crash it ! Rebuild it ! Repeat as needed !!

07-28-2008 05:33 PM

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Beginners Corner > carb mixture

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