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My 1993 Skandic II 377 has Mikuni carbs VM 34 428 on PTO side and VM 34 429 on mag side. What is the difference between these two carbs? Also, does anyone have info for the factory settings. Can’t find any info on these carbs.
 

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The second number refers to the internal setup; they have different numbers because often times, the PTO carb was set up a little richer since it is located further from the fan. If you disassemble them, you will probably find that the PTO carb has a MJ that is slightly larger. The PJ and needle settings were usually the same, but they varied as well from time to time.
 
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