Suzuki DF50 Water Pump Impellor (Overheating)

[Scooby Doo]

Hi Guy's, im a newbie and the forums look great

I have a 2007 DF50 outboard and when running it in a large bucket of water it overheats and the tell tail is very poor and occasionally stops all together. I am presuming the water pump impeller is faulty ? I can get a genuine impellor kit from ebay for about £25 delivered but not sure where it goes or how to fit it ?

I have seen the video of the DF140 on you tube but people are saying the DF50 is different as the lower part only comes down an inch or so until you disconnect additional thingd ???

Any help would be greatly appreciated Guy's......

[boats.net]

Have to loosen the union nut on shift shaft, it's located just below transom bracket.
Number 23 in this link is water pump repair kit, 2007 DF50 Suzuki Marine Outboard WATER PUMP Diagram and Parts