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Old 01-21-2011, 05:22 PM   #1
rekilf
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Default weird scratching noise when using starter

can anyone help when i turn the engine over in my velo 50 it makes a weird scratching noise
what could it be i have checked everything the problem still stays but when turned over by hand there is no noise i am stumped can anyone help.
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Old 01-21-2011, 07:09 PM   #2
papaduke187
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is the engine making the noise or is the noise coming from outside the engine?
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Old 01-21-2011, 08:36 PM   #3
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spin the clutch bell, I've heard that noise when the engine is too high. top of the clutch rubbing the inside top of the bell. otherwise maybe a slipping oneway bearing in the clutch?
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Old 01-21-2011, 10:41 PM   #4
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I have had this happen twice to me.
Once when I did not have the clutch bell assembly lined up correctly with the motor.
The second time was after getting a new clutch, it had a bad one way bearing in it and made all kinds of noise no matter what I did for alignment. Had to put in a new bearing and it works great now..
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Old 01-22-2011, 05:07 AM   #5
rekilf
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i have spun the clutch bell and cant hear anything its not the engine as i stripped it down before i fitted it and there was nothing wrong with it . i am gonna take it apart and check the oneway bearing again.
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Old 01-22-2011, 08:45 AM   #6
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Yup, one way bearing.

Had to change both of mine now on the Velo, not impressed at all.
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Old 01-22-2011, 01:47 PM   #7
rekilf
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check it over and yes yet again the oneway bearing had gone again so i have changed it and the noise has gone
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Old 01-22-2011, 04:41 PM   #8
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are you, or how are you, lubricating the clutch OWB? What starter and engine do you have? I had an Align starter and a KME 60 that was torching OWB's in the clutch, that starter spun too slow to handle the compression cycle (load-unload...) Once I switched to a stronger starter it no longer "hammered" the bearing.
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Old 01-23-2011, 04:19 PM   #9
rekilf
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i am using tri flow grease and i am also using an align starter i the engine i have init is a ys 50
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Old 01-25-2011, 09:00 AM   #10
4 stroke flyer
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I have the same heli and motor combo. I had what I believe is the same sound you are describing. It eventually got worse and I found that my main bearing in the engine was the problem.
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Old 02-04-2011, 11:15 AM   #11
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Engine bearings
Fan in the shroud, or shroud alignment
Clutch bell alignment
One-way bearing
Gear mesh/alignment

Those should be your typical culprits for noise in that area.
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Old 02-06-2011, 03:43 PM   #12
sinbad50
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You will fint the starter shaft is a little to tight in one way , picks the bearing up and makes it scream, Check to see the clutch is free when turning shaft, I turned my starter shaft down a size so that when its located in the one way it has a little play, aka Trex 600. Outrage say the "new one way" sorts it but thats a load of tosh as the part number on the bearing shell is the same, its just that the starter shaft is a little over size for that bearing, Nice heli just needs the odd tweek.
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