I'd like some help with a mower i've not long purchased. It's a Scott Bonnar 17" Model 45 mower with a Briggs & Stratton 2.5hp unit, mower number 08098. The guy i bought it from told me it ran on straight unleaded ?. After running for a while it runs quite rough. The plug is covered in dry carbon also, maybe indicating a rich mix, surely it needs an oil/pertol ratio ? Any help about the fuel for this mower would be very appreciated, Thanks Shawn in Perth.
