Next we'll remove the starter housing by unsoldering the two wires from it. Label one leg with the matching color wire first!
Gently wiggle it out from the turbine housing
I used a soldering aid with 2 alligator clips on it to hold the starter housing vertical.
I dribbled some debonder into the Oring cavity and waited a few minutes for it to do its job.
Dig out the old Oring as carefully as you can with a small screwdriver or whatever you feel comfortable with.
Squirt additional debonder into the cavity and work out any fragments that are left.
A final cleaning with a cotton swab or two will leave no trace of the old Oring. I used a short blast of bottled air to assure all was clean.