I've solved mine in the mean time. It was a cracked hose. Also, I read that high idling would sooner be caused by a broken idle control device and stalling by lack of under-pressure due to cracked hoses.
Best of luck!
I've been having the exact same problem for a few weeks. I have to keep tweaking the throttle until I come to standstill, otherwise the engine cuts out. There's also an idle control device somewhere on there apparently: https://www.euromotoelectrics.com/product-p/idlecontrol755.htm
Does this...
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