Will that seal work on my 1989 500-50hp Canada built, sn7079786?
The 500 model did not have a production year in 1989. In that year as well there were no models listed with that serial number. If you can double check info and give us a call we can assist you further.
We are not technicians, but you can use a repair manual and if you need some installation help you can contact a dealer. You will need some type of seal puller and then some way of pushing in the replacement seal. It might require taking off some components off the outdrive. Repair manual will have a step by step guide.