Keith:
This was an excellent instructional video showing the impeller replacement activities and the many useful tips. Well done, especially with the camera work. What camera was used, and what process did you use to speed up the screw removals ?
My only addition to your explanations would be to wash down the impeller pump housing with fresh water and any part of the engine that was exposed to the salt water running out when pulling the pulley off. This will help keep any salt water corrosion at bay.
Now, having owned a RT R-25 (Classic) with the Yanmar 4BY2-150 diesel and having done an impeller change out which took me several hours first time to do, your video is a reminder to me that I'm so thankful to not ever needing to do that work/activity ever again. It's simply a task that for me is best left for some other person to do. After my impeller change several years ago my arms were so torn up and badly bruised along with hours laying on my belly, that when my wife caught sight of me she was horrified.... and said... "why do you do that to yourself ?".... She had a good point. :lol:
With my RT R-27 Outboard model I do not have to worry about struggling with the inboard diesel engine with its very tight spaces for doing maintenance. Yea, I like to tinker, but honestly, impeller changing on the likes of an inboard diesel engine does not give me any comfort at all these days.
Again, a great video and I'm sure it will be very helpful to others who own the R-25SC.