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  #1  
Old 03-21-2016, 04:03 PM
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Default KT17 Cam

Does anyone know if a cam from a KT17 will work in a M18? I know they won't work the other way because of the cam lobe for the points. At first glance, they look identical.
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1979 IH Cub Cadet 782 w/CH20, dual hydraulics, power steering and Cat 0 three point
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Old 03-21-2016, 04:57 PM
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Quote:
Originally Posted by RLause View Post
Does anyone know if a cam from a KT17 will work in a M18? I know they won't work the other way because of the cam lobe for the points. At first glance, they look identical.
A KT series 1 will not not interchange as it has oiling holes for the splash system.
Also be careful if you have later magnum *30 valve angle vs previous *45.
I don't know the difference in the cam but kohler says to change the cam/lifters when changing to the *30 valves.
I think there is a change in duration of the lift but not positive.
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Old 03-21-2016, 07:41 PM
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If the holes were plugged in the series I cam, do you think it would work in the M18?
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Old 03-21-2016, 08:49 PM
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Originally Posted by RLause View Post
If the holes were plugged in the series I cam, do you think it would work in the M18?
Lift and duration isn't listed for any of the motors. Oil flow is the same with or without the holes. Valve lift is listed as the same. Part numbers are all different. My only question is, is the hole through the center the same, and is it the same length. Measure them up and figure it out. I've never tried to do what your doing, but it looks like they would be the same. Figure it out.


What is wrong with the cam in the Mag that you need a new one? Governor gear wipe it out?
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Old 03-21-2016, 09:08 PM
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Wiped out by the governor. I will do some measuring and see what happens. Thanks for all the info.
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Old 03-21-2016, 10:00 PM
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I did see a pix of 2 cams laying side by side one was the later mag cam and the lobes had noticeable longer duration.
I do not know what the other cam was from, if a series 2 early or late, it was not a series 1.
They are several on evil pray right now, last one I saw go reasonable @ $25 with lifters a couple of weeks ago.
I'm wondering if the additional oil spray from the series 1 cam @ #50 vs #5 as designed would be more than the oil rings could control if the holes were left unplugged.
If I tried to use it, I would for sure plug them.
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Old 04-28-2016, 11:57 PM
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The KT-17 cam will not work in a Magnum engine. The lobes are smaller and you wind up with about .075" tappet gap. With the cams side by side you can see the difference.
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Old 04-29-2016, 01:28 AM
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Originally Posted by RLause View Post
The KT-17 cam will not work in a Magnum engine. The lobes are smaller and you wind up with about .075" tappet gap. With the cams side by side you can see the difference.
That's interesting because valve lift is the same for both engines. I wonder if the cam's base profile grind is different? Just because they look different doesn't mean lift is different. If the base circle on one is smaller, they would look different, but have the same lift. You would just need to increase tappet length. Maybe the lifters are a different length? Did you check that? I'm kind of intrigued....... Maybe the valves are shorter.... ???
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Old 04-29-2016, 08:12 AM
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The KT-17 cam will not work in a Magnum engine. The lobes are smaller and you wind up with about .075" tappet gap. With the cams side by side you can see the difference.
Thank you for taking the time to reply, there are some of us gearheads that lay awake @ night with unanswered questions Ha,LOL!
but seriously, thanks, it will be asked again.
I hope you didn't get it installed and then find that out.
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