ORIGINAL: telmore
Can someone give me a chronology for ST C35 and G21/35 motors?
Tony
I thought the g21/35 was later than '57 and that none had baffles!
I went searching in my engine boxes and came up with an old oil-soaked paper showing parts and prices. There is no print date but in the G21 section a reference is made to the G21Series (62) which MAY indicate 1962. The G21 series (also designated as AA) came in .29, .35, and.40.
The ST .35 Combat is not a G21 but designated S.T. The S.T. series came in .35 combat(CA), .35 stunt(SA), and .51/.56 ring RC(AAA).
The G20 series (also designated as "A" series and Jubilee series) came in .15 (glow and diesel), .19, .23. The parts list excludes front BB for the .19 and .23. It also excludes a pressure fitting for the .15 diesel.
My .15's (glow and diesel) and .23's conform to this (.15 crankcases stamped 1960). Additionally, the .15's have no head fins and no piston baffle. An "A" is stamped in a mounting lug on the .15 glow, not sure if that is a series designation.
My .23's have a baffle but are later models (crankcase stamped 1970).
My older G20 .15 and G21 .35 with the removable front end are both baffle.
I hope some if this helps. I hate to keep typing "My" but since the models changed so much, yours may be different.
George
Edit: Another box, another paper (from 1963). The G21 .29, .35, .40 has 2BB's, The S.T. 35C plain bearing, flat piston, and the 35S plain bearing, baffle piston.