Rob wrote:

Help my Bukh engine stalls when manoeuvring.
My 20 hp Bukh runs like a sewing machine until it is warm and I put
the throttle in neutral. It simply stops most of the time.
I have installed an electric pump near the tank so the system is
permanently filled with diesel.
I have checked the valve clearance, I have renewed the atomisers,
I have checked the filters for dirt or water.
After the engine stops it will start again quite easily.
I have checked the stopvalve.
Who knows the reason?

Have you checked the slow running revs. I had a similar problem with my
Volvo when going from drive to neutral. The slow running was set to too
slow.
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Tony H - www.yacht-judicious.co.uk