Well am I glad I fitted the Aqualarm (Notifies you when raw water flwo is restricted).
Got to boat today, and set rods up and all ready for the off.
Started boat and noted the Aqualarm light was on.
Looked over back of boat and NO water was exiting the exhaust.
Switched engine off and did the first checks.
Sea strainer (Clear)
Seacock (On, which I knew anyway)
Hose down to seascoop and blow (Clear)
Start engine again... Warning light still on, no water exiting exhaust.
People can probably / possibly imagine how I am starting to feel now
Removed the raw water pump, and with 90 hours on the engine, here are a couple of photos of the impeller.
![http://i1254.photobucket.com/albums/hh619/arvor_owners/Imp1_zps59da3ade.jpg]()
![http://i1254.photobucket.com/albums/hh619/arvor_owners/Imp_zpseec9039f.jpg]()
90 Hours.!!!!!!!
I have owned it since it had 10 hours on it, and whilst I can GUARANTEE with 100% certainty I have never run it dry, what I can not verify is the previous 10 hours operation.
All I hope is that the fragments have all exitied the system and there are no parts of rubber blocking any waterways.
Of course, even though I was less than best pleased. I did wander over to the local chandlers, and then got in the car and visited a further 4 chandlers, but wouldnt you know it, whilst they all stock Jabsco Impellers, none of them stock Sherwood, and what is fitted to the Arvor? Damned right, Sherwoods.
On previous boats I always made a point of carrying a spare impeller, with so little hours on this, I really didnt expect to have to replace one already.
The Aqualarm did exactly what it is designed to do though.. It alerted me to the fact there was no water running through the engine.
Dave