I have TS075 that is a combination saw,it can be used as a chainsaw or a concrete saw. The cutoff arm has a pulley with a wave spring that pops over the sprocket to drive the belt. You just turn the oiler off or on for whichever setup your useing. I rebuilt a TS50 with the same setup about ten years ago for a friend of mine. I had my saw at the Mo. gtg,but could't find the arm when I loaded the saws.
Could be this, other option is that it used to be a TS760 and its been converted to the saw (hence no manual oiler). Dont think its an 050, 051, wrong starter housing. Had a customer wanted his converted, unfortunaltely parts in aus are EXPENSIVE, would have cost him more than a new 660!!!
Yeah I thought the 050/051 had the oil filler cap on the top of the case rather than on the side. That's why I was thinking 076/760.
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