I'd go to
http://brownspoint.com/ and order the DF115 Manual. Go ahead and make a complete order for an impeller, oil, oil filters, fuel filter, spark plugs, All Suzuki factory thread locks and spray oils....it's all pretty cheap. Hold onto the replacement impeller since you shouldn't replace it till you feel a "need" to. If you start noticing a decrease or weakened water stream out the starboard side of the engine, that's when I was told to replace the impeller by the Suzuki dealer in Gulf Shores.
An yep, I read the same thing. There were some videos at
https://secure.suzuki.com/marine/sho...eals/enews.php
Good Luck!