We have an old '89 Dixie that we bought a repower engine for a couple of summers ago. I THINK the engine is running too slow. I FINALLY bought a new tach and it runs about 1890 rpms without the blades engaged. I thought my old engine ran about 2100 rpm. Where can I find the proper speed for this engine? I think I heard that some of these Generacs were set up to power generators and were set at 1800 rpm. Can anyone tell me where to get the info? Also, IF it is running slow, how do I speed it up? Thanks, Bob