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  #1  
Old 09-26-2019, 11:00 AM
edward7048 edward7048 is offline
 
Join Date: May 2010
Location: Kokomo, In.
Posts: 106
Default ign. problem

lately when I start the engine during warm up I have a slight miss but
after the engine gets above 120 deg. oil temp. and I start increasing power
for mag. check at around 3300 rpm the engine runs very rough on both
mags. I have to go to very high rpm to make the engine run some
what less rough but have to go take power to make it to run ok. Has any
won had this problem?
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  #2  
Old 09-26-2019, 11:10 AM
edward7048 edward7048 is offline
 
Join Date: May 2010
Location: Kokomo, In.
Posts: 106
Default ign problem

I for got to say that I had installed new plugs and it did not help.
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  #3  
Old 09-26-2019, 11:24 AM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 1,566
Default

How many hours on engine? I just rebuilt both carbs - see... http://www.vansairforce.com/communit...d.php?t=173080
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  #4  
Old 09-26-2019, 11:35 AM
NinerBikes NinerBikes is offline
 
Join Date: Dec 2018
Location: Granada Hills
Posts: 305
Default

How soon do you turn off the choke, during warmup? 30 seconds, a minute, or? If it hasn't been done, I'd say rebuild the carbs, too. Do you run a lot of Mogas with ethanol in it, or 100LL?

Last edited by NinerBikes : 09-26-2019 at 11:39 AM.
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  #5  
Old 09-26-2019, 08:49 PM
edward7048 edward7048 is offline
 
Join Date: May 2010
Location: Kokomo, In.
Posts: 106
Default ign problem

The engine has about 200 hours on it, the carbs were rebuilt by lockwood
two years ago. I burn 93 oct with eth. I release the chock as soon as the
engine comes out of retarded spark
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