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HelicopterThunder TigerRAPTOR 50 › No pressure when starting Rappy
07-11-2008 06:25 PM  9 years agoPost 1
solo

rrApprentice

San Antonio Tx, USA

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I was out today tring to start my Raptor 50. Flew it last week with no problems. It seemed like there was no engine pressure when applying the starter. There was alot of noise while the stater was engage and every now and again the clutch would grab. I thought my starter coupler was loose but it wasn't. I don't know if its my clutch or the motor it self. This is a new and my second Raptor 50. However the engine (O.S. 50 Hyper) was pulled from my Hawk 50. The engine was always run rich and plenty of smoke. No 3D banging as my skills do not allow this. My first thoughts was that either the clucth or rear bearing went out. I have to break it down to see. Any thoughts on this matter.

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07-11-2008 07:22 PM  9 years agoPost 2
David Blain

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Mt. Dora, Florida​(USA)

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solo-
If you have eliminated everything in the Starter coupling and shaft area, I would then turn attention to the clutch assembly!
Bad rear bearings? It should still start and run (though noisy), Unless the bearings are REAL BAD!
Address the clutch then go for the engine breakdown inspection!
Good Luck...

Pull-n-Pitch

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07-11-2008 08:35 PM  9 years agoPost 3
Ben-T-SpindlerrProfessor - Central Illinois - My Posts: All  Forum  Topic

Deleted

... BTS

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07-11-2008 09:46 PM  9 years agoPost 4
TooBizzy

rrApprentice

Georgetown, Ohio USA

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Check the One-Way bearing in the clutch...Sounds like it isn't grabbing the shaft when you're spinning it over.

P-Gasser Se, Raptor 50 Se Hyper, Raptor 30v2, Trex450se, 3dx450...

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07-14-2008 09:43 PM  9 years agoPost 5
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rrApprentice

San Antonio Tx, USA

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Well I figure it out. I dropped the engine out and my clutch screws were broken in half. There was metal shavings all over the inside of the bell housing. I will order a new clutch, bell housing, and fan. I will also have to order some TJ Pro magnets for my new fan. I Don't no what caused this as everything was new.

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07-14-2008 10:01 PM  9 years agoPost 6
RobRoy

rrKey Veteran

Huntsville, Alabama

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Two things could have caused this. If the clutch screws are too long, they won't tighten down on the clutch, and will leave some play in there, that will cause the screws to shear off eventually, or the screws were over tightened upon instalation and streched causing them to be weak. I usually see the first senario causing this. make sure the clutch mount screws aren't bottoming out in the fan hub before they are snugging up the clutch.

Ignorance is curable, stupidity is for life.

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07-15-2008 03:10 AM  9 years agoPost 7
storman1969

rrApprentice

Timmins,Ontario

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WOW! when that ratchet noise occurs it's usually the one-way bearing in clutch but broken bolts never heard of that one.

Keep your eyes in the sky I might be Flying Yeeeeeh!!!!

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07-15-2008 03:53 AM  9 years agoPost 8
David Blain

rrKey Veteran

Mt. Dora, Florida​(USA)

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Solo--
IF you have a tap for the threads run it thru them..
IF not use a new bolt and make sure your threads are clean and
Not cross threaded.... this is important!
Next use some Loc-Tite on the threads so they don't back off!!!

I had a idea it was in the clutch area.. (By the noise described)

Pull-n-Pitch

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