tims tractors 119 #1 Posted December 4, 2017 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 Share this post Link to post Share on other sites
Achto 26,556 #2 Posted December 4, 2017 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. 4 Share this post Link to post Share on other sites
wallfish 15,919 #3 Posted December 4, 2017 If the heads are original, the K90s will have angled/curved fins and the K91s will have straight fins. 2 1 1 Share this post Link to post Share on other sites
tims tractors 119 #4 Posted December 4, 2017 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 1 Share this post Link to post Share on other sites