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HelicopterHIROBOOther › X-Spec starting problem... need help
06-04-2004 05:49 PM  13 years agoPost 1
Nate7357

rrApprentice

Brooklyn, NY

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Hi,

I’m having some problems with starting my OS 91. The - 6MM HEX STARTER set screw does not stay tight no matter how hard I tighten in, or how much locktite I put on it. After one flight the screw comes loose, and I cannot start the engine because it’s not engaging with the engine, what can I do about this?

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06-04-2004 05:56 PM  13 years agoPost 2
mrNoodles

rrProfessor

Borlänge, Sweden

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Dont wanna sound smart, but did you put the startcoupler´s hex screw in the dimple on the clutch/startshaft?

/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.

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06-04-2004 06:03 PM  13 years agoPost 3
Nate7357

rrApprentice

Brooklyn, NY

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^^ Im at work now. Ill check tonight. its possible i didnt. Thanks for the info...

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06-04-2004 06:57 PM  13 years agoPost 4
shootist

rrApprentice

New York State, East Coast US

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I also don't want to sound smart, but that's a side-effect of hydro-locking, too.

My OS 91 was verrrry prone to hydro-lock when new, and a big starter would spin anything that got in its way. I went through two hex adapters, and three starter extensions trying to break in the engine.

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06-04-2004 08:12 PM  13 years agoPost 5
Torito

rrApprentice

Laredo, TX

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I run a YS 91 and buddy runs an OS 91. The YS has never had a starting problem. The OS 91 is a pain to work with when you are in the break-in process.

What we do is tilt the heli to the muffler side or loosening the plug. Either one of these two get it going, just make sure you retighten the plug before you take-off.

--------So that's what this switch is for!!!

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06-05-2004 07:51 AM  13 years agoPost 6
MJG

rrApprentice

Planet Earth

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Problem sounds more like vibration to me. If the grub screw is tight with loctite then a hydraulic lock should not undo it. It must unscrew it's self, surely the engine has to be running for this to happen. I would drop the engine out and get it on the dial guage. Suspect the clutch shaft runout may be significant?

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HelicopterHIROBOOther › X-Spec starting problem... need help
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