TJ5208 1,824 #1 Posted February 28, 2022 I have a P220 Onan 520-8 the battery went dead it reads low on the gauge I don't know if it's from running to less RPMs I put it on the battery charger all night last night. Would you guys mind posting a pic of the amp gauge on your tractors at idle and at Full throttle. Share this post Link to post Share on other sites
953 nut 59,251 #2 Posted February 28, 2022 9 minutes ago, TJ Salyers said: Would you guys mind posting a pic of the amp gauge on your tractors at idle and at Full throttle. Your 520 should have a VOLT gauge and should show about 13.5 to 14 volts. 2 Share this post Link to post Share on other sites
pfrederi 18,558 #3 Posted February 28, 2022 If per chance you do have an ammeter. if the battery is decent and it has been running for awhile the meter should show Zero 2 Share this post Link to post Share on other sites
pacer 3,176 #4 Posted February 28, 2022 Ammeters are very poor in showing condition of both battery and charging. If you dont have one go get one of the cheapo 'multimeters' at HF or most any where $10-15. Ck the battery with it and not running the meter should read around 13.0-13.5+volts, when engine running it should show 14-15volts. 1 Share this post Link to post Share on other sites
TJ5208 1,824 #5 Posted March 2, 2022 I did find the problem it had a blown fuse. Put another one in and back to charging. Thanks guys. Share this post Link to post Share on other sites
lynnmor 7,713 #6 Posted March 2, 2022 3 hours ago, TJ Salyers said: I did find the problem it had a blown fuse. Put another one in and back to charging. Thanks guys. Fuses don't blow for no reason, what was the reason? 1 Share this post Link to post Share on other sites
TJ5208 1,824 #7 Posted March 4, 2022 (edited) A little bit of carb cleaner got on the negative and it caused a big spark. Edited March 5, 2022 by TJ Salyers Share this post Link to post Share on other sites
