Poulan PRK17H42 electrical problem

[bertsmobile1]

Add to that they are not sealed so water from condensation will wick down the cable & start corroding the cable in the middle so when you fit a new cable leave it in the hot sun for a day, clean the surface where it will be bolted on, use a new clean bolt then paint over with liquid electrical tape to prevent moisture penetration in the future.
And I will think you will find the copper coating is on sft drawn steel wire , not aluminium wire.
The demand for electric everything from the environmental idiots has caused a world wide shortage of both copper and aluminium