I have a cheap digital tachometer that I put on my 9N. I think the guy who wrote the instructions had about two years of English. You have to set the correct "mode". I tried "4P1R=4 spark per revolution",
figuring there are four spark plugs, cylinders, etc.. I'm getting a range of readings of about 400 at an idle to about 800 at full throttle. Does that sound like I have it set to the correct mode?
I see in my IT manual under governor setting that the correct speed wide open is 727 ? 800 PTO shaft rpm, 2000 ? 2200 engine rpm, or 1358 to 1494 belt pulley rpm. So if I am somehow measuring PTO shaft rpm,
it would be about right the way I have it set. Is that what I am measuring? Or should I really adjust it up to a max of 2000, since that is "engine rpm"? It seems like it's going pretty fast as is.
figuring there are four spark plugs, cylinders, etc.. I'm getting a range of readings of about 400 at an idle to about 800 at full throttle. Does that sound like I have it set to the correct mode?
I see in my IT manual under governor setting that the correct speed wide open is 727 ? 800 PTO shaft rpm, 2000 ? 2200 engine rpm, or 1358 to 1494 belt pulley rpm. So if I am somehow measuring PTO shaft rpm,
it would be about right the way I have it set. Is that what I am measuring? Or should I really adjust it up to a max of 2000, since that is "engine rpm"? It seems like it's going pretty fast as is.