02-15-2020, 11:43 AM
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)
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)