I have a 2008 Formula 260BR with a 496 HO and I am not getting any water flow thru exhaust since winterization. I had the impeller and Housing Cover (863674a04) replaced 9/13. I have no doubt the impeller could use replacing, but when I had dealer do work 9/13 they said housing had some light grooves. I had them put it back together and it worked fine all last season. Should I replace housing this time around with impeller? What would be the part number and cheapest place to purchase?

Thanks

I would say it's time to replace both. Do a google search to find best deal.

Go ahead and upgrade to the harden marine/cp performance pump. Much better design with wear plates that you can replace when you do your impeller swaps. Do a search on here, there have been a ton of threads. I did mine last year and its amazing how much quicker it starts pumping after starting the engines now.