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Old 05-24-2005 | 09:12 AM
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Sport_Pilot
 
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From: Acworth, GA
Default RE: TT 91 4C Problem ... HELP!!!

The TT .91 doesn't like the 15-6. It will turn only about 8,000 or so. If you do run a big prop, lower the nitro and use a colder plug, such as the K&B 4C. It will detonate and run hot if you do not do this.