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Kohler. 90-91

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I have several of the small kohler  90,an 91 some complete and some not. Some of them do not have a blower cover on them, is there a way to tell them apart without taking the head off and measuring? Some have an  id. tag an some don’t.  Thanks. Tim

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6 hours ago, tims tractors said:

is there a way to tell them apart without taking the head off and measuring?

 

I don't think that pulling the head & measuring would help you find your answer. I believe that the K90 and the K91 have the same stroke & bore (2.375" bore x 2" stroke). Appearance wise I do not know how to tell the difference and most if not all of the parts will interchange. The one difference that I do know of is the governor setting, the K90 is rated at 3.5hp at 3600RPMs and the K91 is rated at 4hp at 4000RPMs. 

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:text-yeahthat:

If the heads are original, the K90s will have angled/curved fins and the K91s will have straight fins.

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That’s the kind of stuff I’m looking for wallfish. Thanks. Ti

Just now, tims tractors said:

That’s the kind of stuff I’m looking for wallfish. Thanks. All   Tim

 

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