I actually have changed the leads. I've got the factory leads running into foot long leads I got from super cheap then a set of terminals I also got from super cheap. Didn't think that would be the cause, figured it might of been the new battery or something.
I'd change it back but a; I need my battery reversed to clear the bonnet and b; the battery posts aren't drilled through so factory terminals don't do the trick.
I really need to get the leads done properly, this is a botch job. Any idea what an auto sparky would charge to change the leads over for new ones?
You want to get good quality brass terminals, the cheap ass stuff reacts with the lead causing all that oxidising. To fix it there is a spray especially for that purpose.. It stops the air getting in starting the oxidization.. It is a yellow mush when you spray it and it dries to a dark gold film.. It works very well
Corrosion is to do with a bad connection, undo the leadclean the terminal.
Those wire cleaners are not good, scrape it softly and until you see a clean piece of lead, then reconnect, and do as previously mentioned.
Go to a ride on lawn mower repair place (or a John Deere Tractor Dealer if there is one around where you are) and buy some of the spray on battery terminal anti-corrosion protectant that John Deere distribute. It's really good stuff and I've used it successfully for years. More popular with farmers for their tractors but the lawn mower people can get it in (that's where I source mine now). They also have a spray on corrosion remover you can use before you use the other stuff.
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