My new to me 920

Got one of those coming in as soon as I finish the owners Simplicity "Sunstar" mower. His 920 has power steering which I don't see on yours. Nice tractors for certain. Do you have the belt sheave covers for the deck? I may have extra for a 48" deck.

nice , i have been looking for one of those for a long time 

Welcome to the forum.

No those will be too thick. Most any farm implement dealer should have them. I only took the exh manifold and inj line off. The pump assembly doesn't need to come out. Just unscrew the part where the inj line attaches.

Edited by im4racin - 01 Jun 2025 at 8:32am

The only issue I had was the one of the brass nuts on the manifold stripped out and could only find a replacement on Amazon. They are m8-1.25. Kinda odd in the US

I wish mine had power steering, I think that was mostly on 1985 models.  A some point I will replace the front tires with 5 rib Vederstein.  She will get her first mowing in my ownership tomorrow, got two yards to mow and one is very tall as they only have me mow it bi weekly.   If the old IH Cub 100 can do it, the diesel wont even notice it.   

All of the diesels I have owned that I mowed with used far less fuel than a comparable gas engine in this vintage.  The flat twins from Kohler, Briggs ect are just gas hogs.  Sound great but come from an era where gas was cheap.  I prefer diesels as the fuel rarely goes skunk unless it gets water or bacteria in it.  The engine can set for months, even years and fire right back up.   New rear motor mounts is next, old ones are super spongy from being soaked in diesel fuel for so long, 

Yes, Lombardini from the pre Kohler days. The smaller 1 cylinder 6hp Lombardini powered constuction arrow boards before solar power took over. Those ran thousands of hours. Only hard to source if your not willing to deal with overseas dealers where these engines are much more common and in daily use.  For the longest time you could not get piston rings.  They now show up on ebay from dealers in Turkey ect.  The trick is to find a nice one, then take care of it.   Be aware of its foilables like chaff build up in the cooling duct due to oily mess/leaks.  In proper tune, they are unstoppable when mowing, even in high grass with left over chaff from 2 weeks ago the homeowner did not rake up like they said they would.   

I have not heard the best reviews of the Daihatsu triple cylinder compared to a Yanmar or Kubota of the same basic size.  But alot of it comes down to how you maintain it or don't.  Same goes for Onan B and P series flat twins.  Some engines, especially older Kohler and older Briggs will tollerate more abuse and lack of upkeep vs others.   I see so many fail to run them at proper RPM when working an air cooled engine because "its loud" or "im saving fuel"  But in instead they are overheating them.  The 920/7790 really needed to have a belly screen or a finer mesh flywheel screen to keep the chaff out of the cooling system.  Being in a garden tractor comes with a set of special needs that some manufactures fail to take into consideration, or owners fail to maintain.  In 25+ years of turning wrenches professionally on small engines.  I have lost count of how many rear engine ZTR's have come with with chaff just packed in heaps around the engine and see a few of them go up in flames because of it(had to spec out the repair costs for the insurance claim).  Or had compact tractors come in for overheating issue and its obvious the owner never bothered trying to clean the chaff off the radiator screens and flush the dirt out of the rad's fins.   

Not going to disagree at all. Kohler bought them as less $$$ to acquire the company than tool up a separate engine line. The design was always sound, but most failures I've seen are from neglect. I've never rebuilt one myself; just seen a lot of them in different applications. 

I will pm you for a price on them.  I dont have the part number, should be the same for all 7790/920 with the Lombardini diesel.  They are unique to that tractor as far as I know.   Hatz and Petter were the other two small diesels used in the flashing arrow board trailer.  Both also solid air cooled diesels, Hatz being German and Petter is UK(now merged with Lister)  I see all three at swap meets.  One of these days if I see one that isnt silly money, I might pick it up to build something with. They can manage a small generator head with proper belt pulley to step up the RPM to the genny.  

I would swap, but my wife runs a Cub Cadet 127, so they go back on that tractor once I get these ags filled with beet juice.