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Old 09-28-2008 | 11:33 PM
  #13  
chashint
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From: Rowlett, TX
Default RE: thunder tiger .91 4 stroke issues


ORIGINAL: studer66

I finally got it running good today. the valves were way out of adjustment. one was tight and one was at about .020, i adjusted them to .004 and it runs great and starts easy without the choke. i just put my finger over the exhaust flip the prop 4 or 5 times hook up the glow starter and hit it with the starter and it starts right off. Its running full throttle at about 9,500 rpm with the 15x6 prop and idles at about 2200 rpm. I know the prop im using is quite large but i have the engine in a bud nosen trainer and the fuse is about 8 inches wide so i have to have a prop large enough to get around the sides. Also thanks for the instruction manual it came in quite handy.
I would normally say 14x6 is the correct prop for a 91 four stroke but if your engine is doing 9500 rpm with a 15x6 the only word that comes to mind is 'impressive'.