Universal Diesel

[sailamaryllis]

We just bought a boat with a Universal Deisel 40, circa 1990, 32hp at 2800 rpm. We don't know how many hours are on the engine but assume less than 5000. It runs fine and has been well maintained by previous owner (heat exchanger and starter replaced). I have no experience with these engines (I've had Volvos, Perkins, Yanmars, Westebekes). My concern is that, after several oil changes, the oil is still very black. Anyone have experience with these? What can we expect? How many hours can you get from these engines? We are planning to take the boat across the Pacific and need to know what failures might occur, what spares we'll need, how long we can expect this engine to run? Thanks for any information.

[PhantomBoatwork]

I just finished rebuilding a Universal m-50 of about the same vintage for my 44 foot trimaran. The engines are built around the Kubota engine block- mine is the V-1902 which has been standard for skid steer loaders for the past 30 years or so, yours is based on the kubota V-1502- a very similar engine with slightly smaller pistons and a slightly shorter stroke on the crank. Kubota is known for making very hunky, reliable small diesel engines for a wide variety of applications.
That being said, I would recommend, at the very least, a compression check of the cylinders and an oil analysis. Diesel crankcase oil is usually pretty black from the high pressure in the pistons and the blowby combustion products- namely soot. Excessive soot or carbon in the oil may indicate worn rings, or incomplete combustion from poorly functioning injectors, but an oil analysis should be able to tell you this. Diesel engines can run for years, but they suffer mostly in a marine environment from corrosion and lack of use, as well as dirty fuel. The diesel grows bugs or gets water contamination which clogs the injectors leading to poor combustion and carbon buildup. My engine had rather a lot of pitting on the #2 and #3 piston, which I attributed to a small water leak, and some detonation probably from water in the fuel. Consequently, I completely rebuilt the engine with new pistons, sleeves, ground and lapped the valves and did a complete rebuild. How well I did- well,we'll see. Personally, I would be rather uneasy on relying on an untested engine for such an ambitious crossing.

[Steve W]

You might also post your question at catalinaowners.com forum. Catalina used these engines in a lot of boats. I can say that my small Universal diesel has always tuned the oil black immediately for the 14 years I've owned it. It still has great compression and does not use any oil between 50 hour oil changes. Kubota is a good source for parts like injectors, etc.

[Sailmonkey]

Originally Posted by Steve W

It still has great compression and does not use any oil between 50 hour oil changes.

50 hours!!!!! I'd die if I changed oil this often!!!!! We're going by the 200 hour interval in the book!!!

[Stu Jackson]

Originally Posted by Steve W

You might also post your question at catalinaowners.com forum. Catalina used these engines in a lot of boats. I can say that my small Universal diesel has always tuned the oil black immediately for the 14 years I've owned it. It still has great compression and does not use any oil between 50 hour oil changes. Kubota is a good source for parts like injectors, etc.

Exactly!

Most engines are tilted back, and the center outlet of the drain pan allows some old oil to stick around. It's always black. Get over it.

[Fletchasurf]

Originally Posted by PhantomBoatwork

I just finished rebuilding a Universal m-50 of about the same vintage for my 44 foot trimaran. The engines are built around the Kubota engine block- mine is the V-1902 which has been standard for skid steer loaders for the past 30 years or so, yours is based on the kubota V-1502- a very similar engine with slightly smaller pistons and a slightly shorter stroke on the crank. Kubota is known for making very hunky, reliable small diesel engines for a wide variety of applications.
That being said, I would recommend, at the very least, a compression check of the cylinders and an oil analysis. Diesel crankcase oil is usually pretty black from the high pressure in the pistons and the blowby combustion products- namely soot. Excessive soot or carbon in the oil may indicate worn rings, or incomplete combustion from poorly functioning injectors, but an oil analysis should be able to tell you this. Diesel engines can run for years, but they suffer mostly in a marine environment from corrosion and lack of use, as well as dirty fuel. The diesel grows bugs or gets water contamination which clogs the injectors leading to poor combustion and carbon buildup. My engine had rather a lot of pitting on the #2 and #3 piston, which I attributed to a small water leak, and some detonation probably from water in the fuel. Consequently, I completely rebuilt the engine with new pistons, sleeves, ground and lapped the valves and did a complete rebuild. How well I did- well,we'll see. Personally, I would be rather uneasy on relying on an untested engine for such an ambitious crossing.

Hey phantom ive got the 44 hp also its running nicely but ive just revamped a cal 39 would like to have a kubota contact for a new set of injecrors and a heat exchanger best p

[SailingwithSoul]

Universal Diesel engines are hardy simple machines. I have an M20, and she runs like a champ. I'm not a mechanic by any stretch, but if the engine is running smooth, the exhaust is clean, and there are no temperature or rpm spikes, you should be okay.

It's possible the inside of the engine needs a little cleaning. You could try one of the many oil additives. There is a thread on this forum discussing the various brands.

As far as spares go, bring plenty of filters for both fuel and oil. Carry extra oil and transmission fluid (enough for a change or two), a couple belts, an extra raw water impeller and extra coolant.

Happy Sailing!

p.s. Oil changes =
Could they have made the placement of the dipstick and drain plug any MORE back breaking and hand shredding

[sailamaryllis]

Thank you for your responses. In another forum someone mentioned that the Universals run cool with the existing thermostat, which is the case with our engine which runs at approx. 160 degrees. Has anyone changed the thermostat to bring up the running temp to create a more efficient cylander burn which might eliminate carbon build-up and potential dirty oil?

[Steve W]

I realize 50 hours may be too often, but due to my business travel and weather (no wind, too much wind, etc) and family obligations, occasionally the boat may sit for 3-4 weeks at a time without being used.. I worry about moisture building up in the bottom of the oil pan and rusting it out. It's cheap insurance for 30 minutes work.