Tillotson HU carb settings

[Jules Richardson]

Perhaps a long-shot, but does anyone happen to know the initial high- speed and idle needle settings for a Tillotson HU carb? (Deffo. Tillotson, anyway - and it has 'HU' stamped in tiny letters on the body, but Google seems to throw up all sorts of variations on Tillotson carbs with the HU name)

The mixture settings have been fecked with, so I'd like to get it back to 'get you running" condition and tweak from there (I'm going to strip it too, just to make sure it's not full of nasties)

I hate small IC engines. I don't know how I keep accumulating so many that need fixing ;-(

cheers

Jules

[andrew]

As long as the jets aren't damaged I always start with open 3/4 turn from closed on each HI and LO screw.

AJH

[Jules Richardson]

Thanks. Turned out that the carb was OK, but the engine's governor spring had gone weak and the throttle was never opening more than about 50%. Shortening the spring a little has worked wonders!

cheers

Jules