Nice score Watson,
Resurrect the big Homelite - try not to part her out. All of these big units deserve a second chance, and that particular saw looks like it is mostly complete. How bad is the handle? Interesting to see that it is a 900D (by the tag) yet it has its kill switch located down below as you mentioned.
I guess as these improvements came along, older saws were changed to suit.
A nice big bore Homelite - hope to see photo's or video of it running some day.
Good luck with it.
Regards,
Chris.
Muffler also says it is a 909/early 990. (Later 990s exhausted to the right.) However, as you pointed out, early parts were superceded quite frequently. I have new examples of both handles and it would quite easy to switch from one to the other on any of the saws. Strangely, of the six 900 series I have, 2 of 3 later style handles have been broken and subsequently repaired. The 3 early style handles are all still intact.
Check out the IPL for this series, never seen anything quite like it. Kind of like IHC for continual changes during a production run.
Chris B.