I have the ym 1700 grey import, has the same cooling system. Tore my hair out until I realised the ratio of anti freeze affected the convection cooling system. I was using about a 30% mixture and add a bit for for good measure. Wrong, it will not allow the convection system to work. I dropped the ratio to about 20% and the cooling is back to normal. I don't take credit for this solution. I found it on the internet about 6 years ago but don't know who to give credit to. I do like your solution and will look into adding a pump to assist when necessary.

My dad had two of these in the 70's. My opinion is that Yanmar engine is the best made! They were exceptionally

Most of these smaller tractors with the 2 cylinder engines, works by the thermosyphon principle, so they just don't use water pumps. Only on the 3 cylinders and on. This applies for Kubota, Shibaura, Yanmar, etc. All very similar tractors. I had a Kubota B7000 that was exactly like yours, it never overheated on me other than when the radiator got plugged. You did found a nice solution for your problem. Simple and effective. Nice. Greetings from Portugal.

In my opinion the best engineering is the simplest. Your solution works and is simple and inexpensive. Nice.

Iv worked mine it's great never had any issue with it never has let me down mostly any thing happens very simple fix

Seen the lawn mower and nearly deleted it then was doing something so let it run an low and behold, I learned a lot and really liked this video. I am setting here thinking that the water goes in from the top then saying no it doesn't and really its been that long that I can't remember cept the thermostat is on top and lets water out when hot enough to circulate so your pump is in the right spot. I think that where that hose connects to that engine... the large one that is factory should be able to attach a pipe that is bigger than a half inch and same on the radiator. So finding a little pump to fit might involve moving the radiator forwards to give the room for a system to not be restricted. Of course the argument that you bring is that half inch hose set up will move more water than the original setup. So no harm an no fowl. I like it and the fact that you don't have to break out a welder and reengineer a whole new rad system has my ideas like the ones for row boats on the titanic.

Great video, Congrads on fixing the heating problem.

Did the same on my Yanmar 1500 I live in the southeast it works perfect I let it run all the time. Water pump for 1999 VW 5 cylinder called aux pump.

Amazing video! Exactly the answer I was looking for.

That’s a hell of a lot cheaper than the water pump kits they sell. Well done

Nice work!

Did you see coolant move in the radiator before installing the electric pump ?

Very cool that you put the water pump on it to keep it cool , 1 question is that water pump electric you connect to tha battery or no need power ? Thanks

Good idea if the pump can take the heat. The upper hose could run dry and burn the pump out I think. Maybe could wire it to the key switch so it would only come on and off if the tractor was running. Sounds like they really should have had a factory water pump for sure.

And they are great little tractors. Hardest working little machines.

I put a new radiator in mine last spring I don't crowd it I run it 3/4 throttle bush hoging or tilling it runs 190ish even in the sumer but you run it to the max it runs 220

I feel Camaratta Style... Soon all utubers will be like such lol

What temp gauge and where ya get the gauge at please ? How is the gauge and pump holding up

Thank you.

that was a good idea.

What type of coolant does it take ?

Can you send me a link to but that water pump

Don't they make a water pump kit for the yanmar thay size? It would be a lot more expensive than thay pump but a lot less janky and stuff to go wrong. Also clean all that crap out of the radiator that will help some.

👈👈👈🚜🚜🚜

make your antifreeze mixture around 20% antifreeze or a little less ,you should not need your pump

If your electrical wiring is an example of your work👎💩😬