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Old 04-24-2013 | 10:34 AM
  #13  
mikes68charger
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Joined: Oct 2010
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From: , OH
Default RE: Back Fire issues

Thanks guys, I found a flying buddy who got one of these motors new, he is more of a collector of planes than a flyer so I have never seen him fly this motor yet, but he had the directions.

It states in his manual that my starting point for my needles should be at 1,1/4-1,1,5 on L needle and 1,3/4-2 on the high needle

So I check were I was and I was at like 2 1/2 on both needles so I was way off.

I only kept adding more fuel on the low needle becouse it was said the backfireing and poping could becouse it was lean, but maybe it was just to rich.

So I will try this, if not, Im going to check the timeing, ( Becouse it will be easy to do with out pulling the motor off this bird.

IF not pull the motor, wihc is a pain! to check the carb screen.

Thanks for all the pointers.