btw impellers are a bit tricky but doable 5.5 and 7.5 need to have the powerhead removed … not really a big deal
just don’t loose the parts on top of the driveshaft (seal …..seal plate carbon seal spring etc… (see picture of similar parts on the 7.5hp )
base gasket under the powerhead may…. need to be replaced if damaged… work slowly & carefully base gaskets are available
https://www.vintageoutboard.com/collections/johnson-evinrude-gaskets?page=2
make certain to get the proper one for your 5.5 based on model number (shapes differ based on year of manuf.)
see pic. ex: of base gasket for the 6hp 6r74
http://www.youtube.com/watch?v=EY2HrEdp5vg
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