Question about whipper snipper stihl fs 38

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Please give me the correct part no for still fs38 around 7years old..

The ignition module part No. is 4140 400 1303A. for the fs 38. the ignition. module Part no 4140 400 1308 does not fire at the same as 4140 400 1303A resulting in incorrect timing Please. Please supply correct part No. for my fs 38.

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