Goldnboy 1,035 #1 Posted June 27, 2019 I have a 520H close by for $250 with the engine supposedly running on 1 Cylinder. Would I have any issues other ther than the key switch if I put in freshly rebuilt K321 in? Share this post Link to post Share on other sites
JAinVA 4,638 #2 Posted June 27, 2019 (edited) I ran a 16 horse Kohler on one of my 520 tractors for a year or so.The engine crankshaft sat about 3/4" lower than the Onan.What I found was that it effectively made the drive belt longer and it rubbed together at the idler pulley.I put a new belt on thinking the original might be stretched but it rubbed as well.I reinstalled the original and after a year it looked like a serpentine belt.Flat!You may not have this problem but it couldn't hurt to check.Any swept axle 520 is worth $250,running or not in my opinion. Edited June 27, 2019 by JAinVA 1 Share this post Link to post Share on other sites
roadapples 6,983 #3 Posted June 27, 2019 with gear reduction steering worth even more... 1 Share this post Link to post Share on other sites
Lee1977 7,232 #4 Posted June 27, 2019 2 hours ago, JAinVA said: I ran a 16 horse Kohler on one of my 520 tractors for a year or so.The engine crankshaft sat about 3/4" lower than the Onan.What I found was that it effectively made the drive belt longer and it rubbed together at the idler pulley.I put a new belt on thinking the original might be stretched but it rubbed as well.I reinstalled the original and after a year it looked like a serpentine belt.Flat!You may not have this problem but it couldn't hurt to check.Any swept axle 520 is worth $250,running or not in my opinion. When I put the Briggs Vanguard on my C-120 I raised the engine 3/4" up to the height of the Kolher and kept running the stock belts. On the 520 the engine plate is already there just add a couple of 3/4 thick x 2" steel flats on top and mount the engine. 1 1 Share this post Link to post Share on other sites
ZXT 2,401 #5 Posted June 28, 2019 I'd buy it in a heart beat. After I got it home, I'd pull the head off of the "dead" side and see what the deal was before I wrote it off. Heck, it may just have a bad coil or plug... You never know. Share this post Link to post Share on other sites
bds1984 1,501 #6 Posted June 29, 2019 I see no reason to not use the K321 if you need to. You can re-use all the gauges except the vacuum gauge which is great to have. With a K321 in it, you effectively have a 14hp hyrdo with would be like a 314 auto or C141 auto. I re-powered my 520H with an M18 de-tuned to 15hp (it was out of a Cub Cadet) and has plenty of power to do any chore I throw at it. 1 Share this post Link to post Share on other sites