Re: Johnson Evinrude 9.9/15 lower unit interchange

[Don]

quote rudderless:

..just to add to what fleetwin said…there are 2 styles of lower seal head thingys…the older single seal style is for the oring drive shaft. The newer ones have 2 seals in them and do not use the oring…ya can use the older oring style shaft with the newer 2 seal…just do not use the oring. The newer 2 seal style have a step cast in to them to hold the 2nd seal. They are easily identifiable by the lump near the flange.

Well, I’m not sure I would use the grooved driveshaft with the two seal crankcase head, even though everything will surely fit together. I worry that the oring groove would catch on the lower seal and damage it…..Don’t know this for sure, but I would not take the chance….