A lesson learn't
While doing my first night navigation in poole harbour my Buzzer/Alarm went off, with a plume of smoke coming from the engine.
Luckly i managed to get a tow back, next day i checking the water intake & the tube between the engine block and telltale, i put it back in the water. Started first time (so no major damage then) but next to NO water from the telltale, must have a damaged impellor.
I sourced after 2 hrs a new impellor and took the gearbox off (all done next to the slip in poole) impellor was not damaged so i put it back in the water. Again only a dribble ???????
Eventually i removed the small plastic part of the telltale the water shoots from fixed to the top cowel, gave one quick blow and a a load of s**t came out.
PROBLEM SOLVED, please dont make the same mistake, leason learnt could of saved myself a lot of grief & time
had a great 5 hrs on the water after that though & engines perfect.