Hello, hustler super z, model 927889, serial 06071549 My idler was making a lot of noise and I noticed what I feel was excessive idler arm movement during operation. I replaced the belt, and installed a new idler pulley. I also ordered a new spring from a site that lists themselves as an authorized hustler parts dealer. The spring did not arrive in any sort of hustler packaging, and was advertised as hustler oem. I am not sure if this is normal or not. My problem is this, the new spring was about 8" eye to eye before installation, and my old spring is about 6" eye to eye. The old one had a gold zinc coating, and the new one was silver. The new spring had a lot more tension and I am afraid it may be the wrong spring. I may be over-tensioned and I do not want to damage any shaft bearings. Is there a way I can find out what the correct length is for the spring? This mower is not original to me so I am not sure if the one that was originally on my mower is the correct item. I will appreciate any help you can provide.