buy a new cable and do some reasearch on seal kits.
I buy my seals from fivestar marine.
and yes, you were hijacking someone elses thread. you read the rules when you joined.
Your 30 year old boat has plastic fittings and plumbing that lasts a max of 15 years.
Plan on going through every bit of livewell plumbing and plan on new thru-hull fittings, hoses, etc
that is a bearing nut. and yes, the manual improperly calls it a nyloc
there is a very specific sequence in the manual. Not a torque for the top of the vertical shaft.
however torque is 118 lb-ft for the pinion nut
and you set a dimension and a pre-load with the bearing nut.