Re: Volvo Penta 5.0 GXI Raw Water Cooling Question
Was there good pressure from the hose?
Was water coming out from the small bellows twixt drive and transom plate?
Has the engine run properly and when - the Volvo pump is on the front of the engine so you need enough head to get water to that height before the pump will circulate it, obviously any blockages in the leg passages, splits in the bellows, blocked hose to or from the raw pump etc will prevent the water getting to the pump.
Is the engine drivebelt OK and in place so the raw pump is being driven?
An alternative might be to fire it up with the leg in a large tub so the water intake is covered, if all is well the level will drop (sharpish), if not then you will see a constant level.
The one thing that makes me think some water was getting somewhere was the slight movement of the temp gauge, most need to be sitting in water to indicate the temp.