Kohler RPMs

[IronPony]

I repowered my AC712 with a K341, 16hp engine. I think it runs slow. At full throttle it still seems like it is not running at high RPMs. Is it because I am used to the newer motors running faster or should I be looking for a problem somewhere. It has a fixed jet carb.It starts and runs just fine otherwise. Has no trouble doing the work asked of it. Dan

[mwells]

Those engines are known to blow rods, there rated at 3600 rpm. I set mine at 3400 after I overhauled it just to be safe. If it does everything you need it to do I wouldn't bother speeding it up. But if you want to you can check the rpm with a vibration tack, thats what I've always used. 3600rpm won't hurt it, just don't go over that. Hope this helps!!

[maxtorman1234]

I havent had any problem with my 9 Kohlers at all. I don't know the RPM's but i will be getting a tach some day. I do find that the muffler used on certain engines seems to make the engine sound slow.

[HubbardRA]

When you hooked up the throttle cable during the re-power, you may not have gotten it set right. Some Kohlers have a screw that adjusts the throttle stop to set max rpm. On others you have to move the cable sheath in the hold down clamp.

[Brent_Baumer]

HubbardRA is correct. It is kinda hard to explain without a drawing so I suggest you find the book on the Kohler K series. I have seen links on here for the books on the web (free downloads). There is an L shaped metal stop for the throttle that sets max. speed. While looking below and to the left of the carb work the throttle back and forth and you'll probably be able to identify it. Loosen the screw and turn the stop to the right to speed up, left to slow down. As for a tach, I use an old Sears 4/6/8 cylinder tach/dwell meter and multiply the reading on the needle. For instance on the 8 cylinder setting, 400 RPM on the meter = 3200 rpm on a single cylinder engine etc. Hope this helps. Brent