Chainsaw Repair

Did some digging and reading. Found a lot of this in a technical bulletin. Here is What I found. Part number 1122 020 2102 is the aluminum flywheel crankcase. Part number 1122 020 2103 is the poly flywheel crankcase. Both have the plug under the oil fill cap and a small capacity oil tank. Part number 1122 020 2113 is late 066/early 660 crankcase with old style bar studs. Part number 1122 020 2116 is the most recent crankcase with the new style bar studs the new style studs come around 2007 or there abouts till the end of production.
Funny thing they show no listing in any IPL that i have for the 1122 020 2103 i guess there was a super cession to the 1122 020 2113 case. maybe some one with an old IPL can check my work.