unkker 7 #1 Posted September 9, 2020 Hey Guys.. I had a engine that went south on me. I'm looking at another engine, however, the crankshaft is 1 inch. My existing engine was an inch and an eighth. (I have no idea if anything is possible.) Is there any way to sleeve, or whatever the smaller crankshaft to accommodate 1 1/8" pulleys. My initial thought was to change-out the pulleys, however I'm not sure that's possible due to the outer pto pulley that has a support attaching in the middle. The new engine also has a tapered shaft close to the engine, where the old engine shaft is the same size, no taper. I hope I've explained all this so it's understood where my issue lies. Thanks in advance for any help. Share this post Link to post Share on other sites
wallfish 18,091 #2 Posted September 9, 2020 Yes, the shaft can be sleeved to 1 1/8. https://www.ebay.com/itm/1-to-1-1-8-inch-1-4-Key-Gas-Engine-Pulley-Crank-Shaft-Sleeve-Adapter-Predator/252430716490?hash=item3ac60b0e4a:g:1JwAAOSwOIlbza8~ 5 1 Share this post Link to post Share on other sites
The Tuul Crib 7,339 #3 Posted September 9, 2020 T😎 !! 1 Share this post Link to post Share on other sites
Achto 29,402 #4 Posted September 9, 2020 Looks like wallfish answered the question, so I'll just offer a 1 Share this post Link to post Share on other sites
953 nut 59,977 #6 Posted September 9, 2020 As John @wallfish told you, it can be sleeved. Another consideration is the thrust bearing that Kohler installs on engines for . The PTO on your crankshaft places a great deal of inward thrust on the crankshaft. Without the thrust bearing you would need to switch (no pun intended) to an electric PTO clutch. 1 Share this post Link to post Share on other sites
Sonny Ramey 0 #7 Posted September 24, 2020 On 9/9/2020 at 1:04 AM, unkker said: Hey Guys.. I had a engine that went south on me. I'm looking at another engine, however, the crankshaft is 1 inch. My existing engine was an inch and an eighth. (I have no idea if anything is possible.) Is there any way to sleeve, or whatever the smaller crankshaft to accommodate 1 1/8" pulleys. My initial thought was to change-out the pulleys, however I'm not sure that's possible due to the outer pto pulley that has a support attaching in the middle. The new engine also has a tapered shaft close to the engine, where the old engine shaft is the same size, no taper. I hope I've explained all this so it's understood where my issue lies. Thanks in advance for any help. ii Is the engine that went south on you a 18 hp kohler magnum? If so, would you consider selling flywheel or engine? Do you know what exactly is wrong with it? I can be reached at sonny.ramey@yahoo.com Share this post Link to post Share on other sites
953 nut 59,977 #8 Posted September 24, 2020 5 hours ago, Sonny Ramey said: would you consider selling flywheel or engine? You may want to place a wanted ad in our free classified section. https://www.wheelhorseforum.com/classifieds/wanted/?do=form&d=2 or contact Lincoln at A-Z Tractor Parts, great dealer and very honest. https://a-ztractor.com/ Take a couple of minutes and tell us a little about your and yourself, just click on this link. https://www.wheelhorseforum.com/forum/47-introductions/?do=add Share this post Link to post Share on other sites
unkker 7 #9 Posted September 26, 2020 On 9/24/2020 at 2:05 PM, Sonny Ramey said: Is the engine that went south on you a 18 hp kohler magnum? If so, would you consider selling flywheel or engine? Do you know what exactly is wrong with it? I can be reached at sonny.ramey@yahoo.com Sorry Sonny, I just saw this. Yes it is a magnum, but it's going on another machine I have. The stator is bad, but it will be backup so I'm ok with it. Share this post Link to post Share on other sites
953 nut 59,977 #10 Posted September 27, 2020 Any specific questions that you have can be answered by members of the forum, we are here to help. Share this post Link to post Share on other sites
unkker 7 #11 Posted September 27, 2020 I'm asking the below for placement of new engine. Is there a specific way to align the drive belt, pulley on new engine? Also, didn't find anything on tension of drive belt. Thanks Share this post Link to post Share on other sites
lynnmor 7,817 #12 Posted September 27, 2020 22 minutes ago, unkker said: I'm asking the below for placement of new engine. Is there a specific way to align the drive belt, pulley on new engine? Also, didn't find anything on tension of drive belt. Thanks Just do the straight edge method mentioned here. I guess that you are using a spring loaded idler pulley, if so the spring sets the tension. Share this post Link to post Share on other sites
wallfish 18,091 #13 Posted September 27, 2020 You can use anything that's straight as a straight edge to line them up or use the belt itself and eyeball it. Belts are a little forgiving in the tolerance for alignment and more so the further the distance between the pulleys, but having them aligned is always best. I've eyeballed alignment on some custom stuff and didn't have any issues. Not sure exactly what you're looking for as far as "tension on the drive belt". Use a stiff spring that allows the pedal to operate with relative ease but applies enough tension to keep the belt from slipping. Share this post Link to post Share on other sites
unkker 7 #15 Posted January 7, 2021 Hey guys, Every time I thought about updating this story, and expressing thanks, I was in the middle of another task. So now, I'm taking the time. I've mowed and pushed snow with my 520 with it's new motor. This Preditor is a true powerhouse. As recommended I bought 2 used electric clutches with both being dead when I received them. I decided to work at using my manual clutch and figured it out. All's good.. Again, thanks to all that helped. 5 Share this post Link to post Share on other sites
