Hi all, When I bought my used 97 GP1200 3 seater from the local Yamaha dealer it did not have the flush kit or hose with it. The fitting is smaller than a standard water house. What do I need to buy, an adapter of some sort???????

yes you need a flush adapter... order one from here at Riva or your local yami dealer... sometimes they are also available on ebay. And just remember to start your engine before you turn the water on to flush.