by DAVEG24 » Tue Dec 18, 2012 5:47 am
Since the Interav alternator is NLA, I would choose the Plane Power unit to install. As a general rule, I always replace the belt when I install an alternator. (Hence the need to pull the prop.) However, if the belt is relatively new, has no cracks or obvious wear, I might be convinced not to replace at that time. The STC will probably recommend what belt to use with the new alternator. I would wait until I had the new alternator mounted to see if the old belt fits, that is to see if there is enough ability to adjust. Your old belt may be too short, too long, or just right. If it's just right or acceptable, then you will know what belt to get if the mounting instructions don't call out a specific belt part number. One other suggestion. Chief Aircraft in Oregon used to be a stocking Interav dealer. They just might have a complete kit on the shelf. You could give them a call just to see.
Dave Gitelman