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Allis Chalmers Kohler KT17 problem

#1

W

wildcatman65

Hello! I've got an Allis Chalmers 917 garden tractor with a Kohler KT17 engine that all of a sudden started drawing oil up into the air filter and saturating it causing smoking and stalling of course. I did a compression check and both cylinders were equal at 90#. I can't see anything else wrong and the manual isn't much help. Could the breather be bad? Is it like a check valve? Any thoughts would be greatly appreciated!


#2

C

chance123

wildcatman65 said:
Hello! I've got an Allis Chalmers 917 garden tractor with a Kohler KT17 engine that all of a sudden started drawing oil up into the air filter and saturating it causing smoking and stalling of course. I did a compression check and both cylinders were equal at 90#. I can't see anything else wrong and the manual isn't much help. Could the breather be bad? Is it like a check valve? Any thoughts would be greatly appreciated!
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I would first check your oil level. Some of the KT17 engines had a reed check valve in the breather/valve chamber, and some did not. You "might" even have "blow by". 90 psi is borderline the minimum compression. If you can rent a manometer, check your crank case vacume, The minimum if I remember correctly is 15 inches


#3

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wildcatman65

Thanks, I'll look into it. It makes sense and the vacuum check is listed in the manual too.


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