Maybe oil for two-stroke watercoooed outboards (TCW-3) isn't up to the higher operating temps of an aircooled two-stroke. Any oil for aircooled two-strokes should be fine.

This stuff works out to about $12/qt - https://www.amazon.com/gp/aw/d/B009SS2JBI/ref=mp_s_a_1_11?ie=UTF8&qid=1489366370&sr=8-11&pi=AC_SX236_SY340_QL65&keywords=husqvarna+two+stroke+oil

Ron, no balance shaft issues with the 211 wagon or are they behind you?

Sixto
83 300SD
98 E320 wagon