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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › starting a cspec 91
02-12-2006 07:46 PM  12 years agoPost 1
rotoryrob

rrVeteran

Auburn WA

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I am having problems turning over my cspec. I have gone through 4 starters and now have purchased the maverick 18 volt start and have had limited success. If it doesn't start right away the pump floods the motor and I have to start all over again. Pull the plug pump the fuel out and try once again. Any suggestions? I can't be the only one having this problem..

Rotoryrob

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02-12-2006 08:20 PM  12 years agoPost 2
DOKEY

rrProfessor

Northamptonshire UK

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Try clamping the fuel line going to the carb, get the engine turning over with the starter and while its still turning over, release the fuel line clamp.

Make sure the bottom end needle adjustment is not too rich else this will flood the engine every time.

Also lean the heli over towards the exhaust when trying to start so the excess fuel will go out of the engine and not just sit there hydro locking the engine every time.

If you have gone through 4 starters on one engine it sounds like you are leaving your finger on the switch too long, allowing the starter to pull more amps, and burn it out, give the starter a rest every so often, to allow it to cool down, and also not stall the starter so often.

OS91 engines will get better as you tune and run them in.

Ryan.

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02-12-2006 08:27 PM  12 years agoPost 3
Cal30pilot

rrNovice

East Peoria, Illinois

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My cspec does that all the time, hydrolocking. I've seen and experienced it a lot. What I do myself and have seen other guys do, is to lean the heli over muffler side down for a few seconds to let the fuel run into the muffler, then trying again. Another trick I've seen and used is after a flight when you set the heli aside or have just filled up and are ready to start, set it at an angle with the muffler on the low side. Say by sticking the blade holder under the skids opposite the muffler to keep the remaining oil and fuel draining out of the cylinder.

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02-12-2006 08:31 PM  12 years agoPost 4
DOKEY

rrProfessor

Northamptonshire UK

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Another thought that I used to do (when the engine was new)
When you have had a flight, turn the engine over so the piston is top dead center, this will stop any fuel residue coming back down the exhaust into the engine, again hydro locking it.

Ryan.

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02-12-2006 09:35 PM  12 years agoPost 5
rotoryrob

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Auburn WA

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I will give that a try all good suggestions. My buddy is having the same problem. gets Frustrating when you want to fly and spend a majority of your time trying to start it. Do the YS motors have the same problem?

Rotoryrob

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02-12-2006 11:56 PM  12 years agoPost 6
n8tivedave

rrApprentice

simi valley,cal,u.s.

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starting the beast
just got done with a flying session in the local schoolyard,the backyard,took with me a fury exteme,not but 3 months old,anyways,i lean it over a little bit to the muffler side,hit the beast with 24 volts,and no problem,starts every time.also do the same with raptor 90se with the pump,cant go wrong with 24 volts,the key is to give it a bump,dont hold it and force,just bump it,should work.

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