On 5 Nov 2005 03:29:37 -0800, "Homer2911" wrote:

If I push my engine hard for any length of time, as on the upper
reaches of the Llangollen in the tunnels, it develops an air lock in
the top of the skin tank and overheats.

Might this be a sign of water pump trouble, or is it summat else?

Hi,

Try asking on uk.rec.waterways.

cheers,
Pete.