ys63 fz power dropping off
02-03-2008, 10:37 AM
#1
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Location: kettering, UNITED KINGDOM
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ys63 fz power dropping off
advice needed please, i have a ys63 which when held on full throttle for about 5 seconds, starts to lose power . i have tried new plug, adjusted the tappets, set the regulator, idle and top end adjustments but i still dont think its as it should be. at best its now pulling 10400 on a 12/6 prop and 30% coolpower helimix. Also, the hs needle setting seems to be very critical, just a couple of clicks either way and it wont run, my 160's can have about half a turn either way and not have too much difference. any ideas please.
02-03-2008, 02:33 PM
#2
Senior Member
RE: ys63 fz power dropping off
Its likely time for a new ring. This happens usually about 200-300 flights depending on how the engine has been run.
Also it could be some carbon build up depending on the fuel you are using...If it has any castor oil in it then the exhaust valve is gunked up and this could be another cause for lack of performance.
Troy Newman
Team YS
Also it could be some carbon build up depending on the fuel you are using...If it has any castor oil in it then the exhaust valve is gunked up and this could be another cause for lack of performance.
Troy Newman
Team YS
