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Question about sea water pump impeller location. I have a 2004 Horizon 200 Volvo Penta 5.0 GXI-E with an SX drive. I have been researching on the internet for drawings of where this impeller is located. From what I have determined it is located on the front of the engine and driven by the serpentine belt. Is there also an impeller in the lower unit?
Thanks

I'm not a Horizon guy, but, the impeller is usually located on the front of the engine, bottom pulley.
Check the below link....
http://www.marinepartseurope.com/en/vol ... -6574.aspx

The outdrives usually don't have impellers, at least in my dealings with them.

Hope this helps, good luck.

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-Tony
2016 Robalo R200 w/Yahama 200!

Previous boats:
2003 Four Winns 248 Vista - sold
1994 Sunbird Corsair 200 - sold
1980 Checkmate Predictor - sold

Mercs I know, the Volvos I am still learning. BUT, if you look at the front of the engine, you can tell at a glance. Both Merc's and Volvo's have the standard (like a car) water pump driven by the belt. It you look farther down on the crank shaft, IF you see hoses and a housing. That would be your raw water pump and that impeller should be changed out every year or two. Depending on usage. If there is not one there, than I would "think" it is in the lower unit. Like an Alpha drive.

NO impeller in a volvo drive, the impeller is either mounted at the bottom left side of the front of the engine, or on the crank pulley.

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II