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Jung
@pdlouche
@Airhead hmmmm. Thanks will consider that. Spark plug core has been the lighter shade of brown but looked as close to ideal as possible. Possible float height, hadn’t thought of that.
I’d put the main jet needle clip back to the centre as I think it was set one step closer to lean before, but that didn’t change anything - besides it’s an issue before that jet comes into the equation. When set two steps richer it was sputtery and shit. Maybe it has a leak somewhere.
It may indeed help adjusting the timing screw vs idle screw. Some months ago I had to leave the idle at a steady 2k because lower than that it used to hunt and until recently I couldn’t trust it not to stall anyway. Will look for my little idle screwdriver, see if I can adjust it and get it running lower consistent idle without immediately stalling on throttle.
@jackbepablo I’ll check the fuel cap but the noise of air/vapour escaping in the heat leads me to believe there’s no vacuum there. I have an inline fuel filter that seems to show nice steady fuel flow. Will check for kinks elsewhere.
@Jung this is probably the next step. No amount of high quality Shell fuel through an extra inline filter can save me from a clogged jet.