OK, so there ain't no genuine MC-45Ds, it's a contrived MRC creation. but there is the mysteriouse MC-91C listed on the genuine McCulloch Corp IPL for the 91 series dated 1970.
From what I can decipher from this document, it used a pressure pulse carb(straight bore) with the choke assembly, the same block as a MC-91A but a thicker head gasket, and had a flywheel and side cover set up with the rope pull starter. There is no decal listed, leaving me to beleive this was a commercial engine with no markings on it; maybe that is what the C designation stood for. I may well have one of these engines because I have a MC-91A that came with no sticker, a thicker head gasket and a recoil starter, I assumed somebody had added that, but maybe not. My initial assumption was the sticker was long gone, but maybe I have an actual MC-91C and did not know what it was. Has anybody seen an original? Were they all yellow like mine was?
Interestingly, the MC-91 is listed twice as there were two versions according to the parts list, but the only differances in the parts list are the two first serial number prefixes are different, and the early MC-91A used a different idle adjustment screw on the carb. Other than that, I could find no other different parts listed.
Mac 91C
Moderator: Rob Voska
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vince hughes
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Re: Mac 91C
Jmen,
Seems like I read somewhere that 91C was made for some kind of snowmobile. Similar 101C was a painted version of Mc101 kart engine found on Dune Cycles and other non-kart machines. They had the regular Mc101 decal.
Seems like I read somewhere that 91C was made for some kind of snowmobile. Similar 101C was a painted version of Mc101 kart engine found on Dune Cycles and other non-kart machines. They had the regular Mc101 decal.