I've changed my impeller myself once since I've owned the boat. It's time again. It took me (unexperienced and first time) about 3 hrs to change it out. I removed the starboard side exhaust elbow to give space to reach the impeller area. There is a small panel that snaps into place covering the pump. I removed it, removed the screws and removed the impeller. I used a cable tie to hold the impeller fins in the right orientation and once the impeller was in place I worked the tie off. I lubricated it very well for it's first "dry" start and it worked perfectly. Once I figured out how to access the impeller, the actual work to remove the exhaust elbow, remove the impeller and replace it, reinstall the exhaust elbow with a new gasket was perhaps 1.5 hrs. I used a mirror leaning up against the transom to view the back of the genset.
I took the opportunity to inspect my exhaust elbow for any defects or weak areas. It is a pain in the "arse" to change, certainly more difficult than need be, but is doable without having to unbolt and slide the unit.
I will be changing it again here in the next month at which time I will be removing all the exhaust elbows for both engines to do inspections.
I can't see 10 hours to do the work. I think quite a bit of that was the mechanic's learning curve.
When I do it, I plan on taking pics and putting a write up on the process on
Boat-Projects.com
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Jvalich
http://www.badcock.com'04 FW 288 Vista "Mental Floss"