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-   -   YS91 Problem , (help Dave!) (https://www.rcuniverse.com/forum/ys-engines-support-197/569577-ys91-problem-help-dave.html)

obi1 02-19-2003 01:48 PM
YS91 Problem , (help Dave!)
 
Hi again Dave,

I rebuilt the YS as in previous Post , however I ran it up and it runs Ok , but there is a definite metal to metal click while turning the prop , it happens at exactly the same point every 2 turns of the prop , could you tell me what this is likely to be the problem , I cannot remember this clicking pre-crash , it is a definite metal to metal click.
Thanks for any help Dave

Dave Shadel 02-19-2003 04:38 PM
YS91 Problem , (help Dave!)
 
Cam gear or crankshaft gear chipped?

obi1 02-20-2003 10:23 AM
YS91 Problem , (help Dave!)
 
definetely not , if i hold down the valves which means there is no compression then the clicking stops and everything turns very smoothly

obi1 02-21-2003 03:18 PM
YS91 Problem , (help Dave!)
 
Any other ideas Dave

Dave Shadel 02-24-2003 04:12 PM
YS91 Problem , (help Dave!)
 
Check the rocker arm shaft.


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