prop installation Yamaha 115

Some assembly required.Took my rig to an OMC dealer last year for winterizing and storage.My Yamaha factory prop was damaged so I asked the dealer to replace the prop.I removed the Omc prop to inspect the prop shaft and seals etc. before winterizing.The OMC prop had a sleeve,spacer, washer and nut.I next attempted to remove the thrust washer but it will not budge.I will probably have to use a gear puller to get the thrust washer off.The thrust washer probably is not doing its job if it is not free to move? I installed the Yamaha prop and then according to my owners manual I should have room to install a spacer (brass) followed by a washer and finally the prop nut and cotter pin.After sliding the prop on the shaft I only had room to install the washer and nut.The washer appears to be stainless steel and is about 1/2 inch thick.Is this washer actually the spacer? Hoping any of you guys running Yammies can clear things up for me.