25hp E-TEC oil pump/tank o-ring leak. Fix applied and still leaking...alternatives??

a week ago

New to me 2013 25hp (E25DTLAAA) with leaking oil pump o-ring to oil tank connection and two o-ring fix already in place. The issue and subsequent fix have been discused many times on this forum but I haven't located a thread discussing what to do if fix fails. Any suggestions would be appreciated!