Geoff Weeks Posted Tuesday at 04:47 PM Share Posted Tuesday at 04:47 PM "Has fuel system problem, starts and runs on ether'! Yeah it will have a fuel system problem if you don't run a fuel filter on a diesel. And NO it doesn't run on ether, for long. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/ Share on other sites More sharing options...
Joseph Cummings Posted Tuesday at 05:06 PM Share Posted Tuesday at 05:06 PM What was it? Looks small Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/#findComment-575227 Share on other sites More sharing options...
Geoff Weeks Posted Tuesday at 05:29 PM Author Share Posted Tuesday at 05:29 PM D950 Kubota. Like most Kubota's when one cyl fails catastrophically it still runs on the other 2! No longer "wisper quiet" however! Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/#findComment-575231 Share on other sites More sharing options...
mowerman Posted Tuesday at 07:17 PM Share Posted Tuesday at 07:17 PM it doesnt even look repairable wow,,,,not a pretty sight,,bob Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/#findComment-575236 Share on other sites More sharing options...
Geoff Weeks Posted Tuesday at 08:29 PM Author Share Posted Tuesday at 08:29 PM Depends on how bad the bores are, It is dry lined engine so as long as any damage hasn't penetrated the liner into the block, it should be rebuild able. I've got some used pistons that don't look bad, and it will need at least one rod. Rod could be removed from the bottom with the head in place! The effected rod big end looks fine, both crank and bearing shells. Unit came with a top end gasket kit, another new set of main bearings, and assorted loose gaskets. Had it running long enough to verify the generator it was attached to works, so I know it is worth putting a little into it. Kubota's are tough little engines! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/#findComment-575248 Share on other sites More sharing options...
Geoff Weeks Posted 17 hours ago Author Share Posted 17 hours ago Got tore down this AM, block, head, crank are all good, needs one liner, one rod. Going with a good set of used pistons I have. These engines use a shim between the head gasket and head if the piston clearance isn't to spec (block or head have been decked) it looks like he needed one and didn't install one. Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/#findComment-575359 Share on other sites More sharing options...
mowerman Posted 13 hours ago Share Posted 13 hours ago looks like you got lucky,,,good luck,,,rings look new,,bob Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/#findComment-575384 Share on other sites More sharing options...
Geoff Weeks Posted 11 hours ago Author Share Posted 11 hours ago I doubt the rings have 1 hr of run time on them. When ever you buy at auction is is a roll of the dice. I knew this didn't run when purchased and paid less then scrap, I can put a little into it and be fine. I need to buy some tooling to work on an engine this small, need a smaller "rack" for my index hone and a 75mm ring compressor. fortunately, the seller provided the old parts he took out, and they didn't have many hr on them either. According to the writing on the air cleaner, it has a grand total of 32 hr run time since 2013. Engine has a rebuild tag from some outfit I haven't heard of. My guess is both the block deck and head have been shaved, raising the compression and bringing the piston too close to the head. It likely ran ok when the engine came from the rebuilder, but when it got worked, the clearances were too tight and the pressures too high, which lead to one rod failure. The guy I got it from tried to rebuild and made it worse. piston to head clearance spec is 0.024-0.031". go to much it it will have low compression, with all that brings, go too little and you end up where I am at. I will try and end up in the higher end of that spec, but it all depends on what thickness gaskets are when compressed and what cylinder head shim I can lay my hands on. I'll start by measuring the piston protrusion or lack there of, in relation to the block deck, then mic the old head gasket thickness to get a ball park figure, then add in a shim if needed, and finely assemble with a piece of solder through the injector port and roll passed TDC to get the final assembly clearance. If it is not correct, then a new head gasket and more or different shim. I don't know of too many engines that can survive a running failure of a piston and not take out the block. Kubota's are tough little engines. Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/#findComment-575391 Share on other sites More sharing options...
Joseph Cummings Posted 9 hours ago Share Posted 9 hours ago On 5/6/2025 at 4:29 PM, Geoff Weeks said: Had it running long enough to verify the generator it was attached to works, so I know it is worth putting a little into it. About a 10 KW 1800 RPM gen-set? Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/#findComment-575393 Share on other sites More sharing options...
Geoff Weeks Posted 8 hours ago Author Share Posted 8 hours ago No, a 6kw light tower. 1800 rpm tho. Quote Link to comment https://www.bigmacktrucks.com/topic/75495-not-a-truck-but/#findComment-575394 Share on other sites More sharing options...
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