Yeah, they can be a bugger to come off without damaging
Inspect the tapered part of the shaft & fly-wheel it may need some good cleaning (don't loose the key)
IF??? your fingernail get caught on the grooves it will need a re-bore
If not, than a honing stone will clean-up the glazed cylinder-wall
These engines do not have sleeves!
True, you're absolutely right!!
I guess I should of worded it different, maybe like this;
Once the float valve is closed, the line to the enrichment valve is gravity fed.
When the float valve opens (due to low fuel in the bowl) it would be.
