Z425 wont start under own power

[Pain67]

hello all. I have a 12 year old z425. I thought it was just getting picky on the battery but I replaced the battery again brand new and it still wont crank under its own power. If I jump it off my truck it starts right up its strange I have hooked the battery up to my charger and it reads 95% so i charged it over night slow charger and same issue. Any idea why it just wont go?

To be clear I turn the switch you hear power hit but it doesnt even turn over once in a attempt to start


Any advice is appreciated!

Thanks

 

[Hammermechanicman]

Sounds like a bad starter solenoid. Jump across the 2 big terminals and see what happens. Don't mind the sparks.

 

[bertsmobile1]

Remove all of the heavy power cables including the grounds.
Clean them all up nice & bright and where they they bolt on, clean up the bolts & nuts then try again
If it starts fine off the battery get a can of liquid electrical tape and paint over all of the terminals so you wont get then corroding again .