Tuning and Fixing Your Old Tillotson HR Carb
If you spend any amount of time working on vintage snowmobiles or old-school go-karts, you're going to run into the Tillotson HR carb sooner or later. These things were everywhere back in the day, especially on those classic Ski-Doos and old JLO or Hirth engines. For a lot of guys, these carburetors are a source of constant frustration, but honestly, once you understand how they work, they're actually pretty clever little devices. They don't have a float bowl like your lawnmower or a modern dirt bike, which is exactly why they were so popular for machines that jump, tilt, and vibrate like crazy. ...