Need more help with my ym2000. (Over heating)

dirtracer7x · Aug 27, 2017

So I finally got the finish mower hooked up and started mowing. 1 in pto, 2nd gear high in trans @ 2000rpm. Plenty of power but didn't take but 5 mins for it to start puking water. Pulled over to hose and sprayed through radiator and cooled it down a bit. Popped cap and added some water. After filling it again it looks like there is barely any flow. On a car you can really see the water moving after thermostat opens.
Should I see good flow? Maybe I have a bad water pump?

winston1 · Aug 27, 2017

I don't think you have a thermostat. Never owned a 2000 but I know my old 2002D had a strong flow. I would think the 2000 should.

jaxs · Aug 27, 2017

Flow or no flow,it's overheating so if you don't know what's causeing it take it to a mechanic without delay. I emphasize "without delay"because diesels will quicklyl self destruct from overheating. There are very few water cooled engines that don't use a t-stat.

winston1 · Aug 27, 2017

"There are very few water cooled engines that don't use a t-stat." Yanmar made quite a few and even quite a few without water pumps.

I sure agree the overheating needs to be addressed. :thumbsup:

normde2001 · Aug 27, 2017

No tstat and not a bad waterpump, unless the fan is into the radiator. Make sure the radiator fins are clear and back-flush the system.

void777 · Aug 27, 2017

How fast is it over heating 5 min blow out radiator fins with air if that dont help check the over flow bottle for bubbles could be a head gasket let us know what you find.

LD1 · Aug 27, 2017

Compressed air is best for blowing out radiator.

Water just turns the dust/pollen stuff to mud like and it sticks on. It's gotta be dry, and blow it out with air.

If that don't do it,and radiator is clear...you ain't flowing water well enough. Could be pump, or could be cores in radiator plugged

dirtracer7x · Aug 27, 2017

Tried back flushing and it seems like it takes all the water hose pressure. Oil is clean so no blown head gasket.
Just doesn't seem to be enough flow. Water isn't moving much at 800 rpm.

4get gto · Aug 27, 2017

I remember seeing on something one time where the propeller broke loose from the shaft on the pump. Just a thought. Wouldn't be hard to pull the pump and have a look.