Can anyone confirm the right rpms for a '98 Kawi 14hp FC420V? I was told 3450 from my shop but read 3600 everywhere else. How much rpm should it drop with the blades engaged? I have a 48" hydro. Tiny tach reads 3480 no load and 3380 blades engaged. I remember seeing as high as 3510 no load but my throttle level is touchy the closer it gets to choke position.