Have you tried hooking the hose up and starting it again at home since then?
Hi Kevin,
Yes - I took the battery out and charged as soon as I got home - then connected up hose, 2nd battery and sure enough it fired up straight away.
Left her running for 10 minutes - stopped left for half an hour and repeated - no problems.
Before you ask - fairly certain not the battery as, to be sure, connected up a battery pack when she was in the water on Sunday without any success.