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  #21  
Old 02-03-2010, 07:22 AM
arska75 arska75 is offline
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Join Date: Feb 2010
Location: .
Posts: 3
Hi, could someone measure the resistance of primary coil, between those thin wires?
Ohter goes to kill switch and other to body.
secondary coil is about 7.4K ohm from spark plug wire to body.
Thanks.
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  #22  
Old 02-03-2010, 09:31 AM
rotti1968 rotti1968 is offline
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Join Date: Nov 2009
Location: branchville nj
Posts: 169
Stihl does not offer any form of resistance testing for the coils. Based mostly on the fact that they are not true coils but modules and have internal chips and circuit boards, you will never get a good reading. Stihl's testing consists of spark or no spark, weak spark or loss of spark when hot, and kill circuit testing. If you isolate the coil and the kill circuit tests good, and your boot and connector are good, then your problem is with your coil and you just replace it.
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  #23  
Old 02-04-2010, 03:02 AM
arska75 arska75 is offline
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Join Date: Feb 2010
Location: .
Posts: 3
okay, first the spark was weak when coil warmed, idle was good. now from coil cames only 30 volts ac. Maybe coil is End of life ;(
I have removed the kil circuit.
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  #24  
Old 03-11-2010, 06:54 PM
tennstripeking tennstripeking is offline
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Join Date: Aug 2009
Location: Pleasant View, TN
Posts: 19
Hey guys just wanted to give yall an update on my br400. I replaced the ignition module and it is working like a champ. I also changed fuel filter, and spark plug. Thanks to all of you for the helping me solve the problem.
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  #25  
Old 03-14-2010, 03:42 AM
arska75 arska75 is offline
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Join Date: Feb 2010
Location: .
Posts: 3
I'm looking used or oem module because in finland original price is about 100$
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blower , br400 , stihl , wont run

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