Mac motor ID needed - Printable Version +- Vintage Karting Forum (https://www.vintagekartforum.com) +-- Forum: Vintage Kart Identification (https://www.vintagekartforum.com/forumdisplay.php?fid=15) +--- Forum: What Is It? (https://www.vintagekartforum.com/forumdisplay.php?fid=33) +---- Forum: VINTAGE KARTS 1971-1979 (https://www.vintagekartforum.com/forumdisplay.php?fid=89) +---- Thread: Mac motor ID needed (/showthread.php?tid=2807) |
Mac motor ID needed - Jeffrey Sligh - 02-10-2020 Trying to figure out which motor this Mac is, I'm thinking it is a 91, but I'm not 100% sure since I'm not fluent in Mac. Didn't see an engine area on here, so I figured I'd put this here since I know the motor was bought before 1972. Flywheel side: IMG_20200203_162038.jpg (Size: 1 MB / Downloads: 19) Dual Carbs: IMG_20200203_162124.jpg (Size: 1.11 MB / Downloads: 10) Clutch side (BTW, which clutch is this? Horstman?): IMG_20200203_162547.jpg (Size: 1.12 MB / Downloads: 14) Back of the motor: IMG_20200203_162616.jpg (Size: 1.42 MB / Downloads: 11) RE: Mac motor ID needed - Scott Elkes - 02-15-2020 You are in the right area (Mc-91 series). It is definitely is a 100cc McCulloch. I think I see a head gasket, that would rule out the next generation Mc-92 that used an o-ring. I'm not 100% sure, but could rule out Mc-93 due to color. (Horstman spec'd out with McCulloch 93 and 101b engines and was sole US distributor pruchasing the kart engine production run. Believe the Mc-93 was red and white). Removal of the clutch and exhaust header with a clear picture of that side showing exhaust port and bearing seal will provide significant information for an i.d.. Mc-92 shown... IMG_2303.JPG (Size: 1.88 MB / Downloads: 15) IMG_2294.JPG (Size: 1.33 MB / Downloads: 9) |