YM 2000 won't start

double hunter · Jul 28, 2012

Just bought a Ym2000, it's been setting up for several years, the owner said he thought it had not been cranked in 3 years, was running, he just quit using it, it will turn over, I drained the fuel tank and replaced with fresh fuel, still did not crank, cracked the lines at the injectors and no fuel, opened the lines where they come out of the pump and on one side I am getting a small amount of fuel with little pressue the other side has no fuel at all coming out, has the pump gone bad from just sitting or is there something else i can try, iit's a good looking tractor after I pressured washed off the black from sitting under a oak tree, didn't give but 800.00 for it and came with a decent 4' bush hog and box blade, any help appreciated.

clemsonfor · Jul 28, 2012

Dont think your can go wrong for the price. Boxblade worth $200, bushhog $300 maybe less depending upon condition for you paid about $300 for tractor, which is a steal. You can get it going but dont listen to what a seller siad unless he is a good budy. They always ran 3 years ago when parked?? Why would anyone be using a tractor then park it for 3 years if it ran flawless?

Did you replace fuel filter? Bleed the 2 screws on the filter housing then the one right at the injector pump? If you got all air out there keep cranking, are you getting any smoke? Also leave fuel cap loose to make sure air is getting into the tank. The cranking procedure is to pull the throttle all the way back toward you, if you have thermostart you can use it by turning key to left (u dont need it in this weather though!!!). Now once throttle is open crank the engine over. You should be getting greyish/whiteish smoke out of exhaust if its getting fuel. Once it starts reduce the throttle till 1500 rpms. Try this and let us know results.

California · Jul 28, 2012

Bleeding air out of the fuel line on these takes a special ritual:

There is a bleeder screw on the inlet (tank) side of the fuel filter, another on its outlet side, and a third one down on the injector pump inlet.

Open each bleeder in turn starting from the filter inlet, bleed until no air comes out, close it, move on to the the next one.

The experienced dealers who post her have said this is all that is needed to bleed the fuel system, there is never a need to open the high pressure lines beyond the injector pump.

I bought my YM240 (same as YM2000) after it had sat for a long time. The fuel had gone bad and it was hard to start. Fresh fuel (and correct bleeding) was all it needed to start easily and run like new.

California · Jul 28, 2012

Clemsonfor covered the stuff I missed. One more tip: You can get it spinning with the compression release pulled, then push in the release lever and the inertia of the flywheel will assist the starter to crank it past the compression stroke faster than the starter alone can do.

It is unlikely that the injector pump is bad, this is rare. Bad fuel, then low compression (rings & valves) that make cold weather starting more difficult, will be the culprit 90% of the time.

winston1 · Jul 28, 2012

Might give this tip a try. Injection Pump Won't Pump Fuel

clemsonfor · Jul 28, 2012

California said what i meant to say. Injection pump failure is very rare, so i too dont think thats the problem.

Like he siad its far more likely the compression is low due to worn rings or a blown head gasket giving trouble.

California · Jul 28, 2012

Sometimes 'ran when parked' means he couldn't get it started the next day.

I see there are prior threads on this topic listed at the bottom of this page. It might be worthwhile to read through them.

Soundguy · Jul 28, 2012

fill with good fuel and plenty of power service... now... set throttle and put in gear.. and have someone drag you all over the pasture.

fastest way I know to get a diesel primed.. and it's easy on the starter and battery..

284 International · Jul 29, 2012

Soundguy said:
... set throttle and put in gear.. and have someone drag you all over the pasture.

fastest way I know to get a diesel primed.. and it's easy on the starter and battery..

And on the YM2000, you can use the compression release to make this easier. My girlfriend's YM2000 won't spin the engine against compression without an implement on back or with weighted tires.

If the system is not properly bled, though, it will be fruitless. Clemson and California gave excellent instructions.

double hunter · Jul 29, 2012

Worked on this a while this morning, this injector pump must be different, the previous owner removed the fuel filter and ran the fuel line straight into the pump, I am going to correct this tomorrow, there aren't any bleed screws on this pumpb ut I opened the fuel lines where it comes out of the pumpand allowd the air to bleed off, this worked on one of the lines and i now have fuel all the way tyo the injector on one line, I wasn't getting any fuel out of the right hand line, took the line completely loose from the pump. no fuel, I looked at the picture of this pump on the Hoye tractor site and it does not look like the pne they have posted, they fuel show the fuel lines coming straight out of the pump, these lines come out in the same place but sort of T off the top, it has a cap on the end of this and if this is loosened the conn. to the fuel line will rotate around this shaft, anyway i screwed that mechanism out of the pump and there is fuel coming out of the pump and also the conn. to the fuel line, but when I tighten this back down the fuel flow stops, may have to call Hoye in the morning for some advice.

double hunter · Jul 29, 2012

Went back and looked at Hoye again and this pump has what they call a ' banjo' type connection, should not matter, I am not getting fuel here for some reason.

grainger12002 · Jul 29, 2012

still sounds like air in the system, if you have fuel at one fitting or injector should be able to get fuel to the others. Its not always easy to get the air out. Especially because you are not sure why the previous owner let it sit for so long.......you will get it though.

From CT

double hunter said:
Went back and looked at Hoye again and this pump has what they call a ' banjo' type connection, should not matter, I am not getting fuel here for some reason.

winston1 · Jul 29, 2012

Did you try tapping on the pump while turning over as Hoyes tip suggested?

double hunter · Jul 29, 2012

I did try tapping on it to no avail, I'm going to put a fuel filter or some type of cut off on it in the morning so i unscrew the connection that goes to the fuel line and see if this clogged in some sort of way or not lined up correctly

clemsonfor · Jul 29, 2012

I know you said there was no filter on it to begin with. Are you using the factory fuel bowl? Are you using a factory filter in that bowl or one of those inline throw aways? Just so you know you can get the filter for a ym2000 at napa or carquest, if you look up a ym240 which is the american model and they list it in books and computer. Anyway i say this cause the retaining ring can be trouble some and is a spot to suck air especially if your oring is bad or not there.

Soundguy · Jul 30, 2012

there ar enormally bleedes on the fuel setteling bowl.. if no bowl.. add one...

clemsonfor · Jul 30, 2012

Just what i was thinking soundguy. There are 2, on almost all japaneese tractors including the american JD's either yanmar built or with older yanmar motors.

There is one on the inlet side and one on the outlet side.

California · Jul 30, 2012

Doublehunter, if there is no fuel filter on there at all, this points to serious idiocy by the previous owner. The injector pump can't tolerate unfiltered particles.

As a minimum put on a throwaway filter while you are waiting to find the authentic filter assembly.

On my YM240 I found a throwaway filter where the real filter should be. I replaced it immediately with a fresh equivalent. (Photo link)

Then I bought a filter assembly off Ebay advertised as perfect replica of the oem filter - but it wasn't. It had an extra fuel return line fitting that was difficult to plug, and it wouldn't take a Yanmar element. Photo 2.

I ran with both filters until I found the authentic Yanmar filter assembly at my local VN 'rebuilt' importer - who had an unfortunate quantity of warranty return tractors out back to salvage parts off of.

I suggest a throwaway filter immediately - before attempting to start the tractor again - then buy an authentic used filter assembly from Hoye or someplace. (with new element and O-ring).

PS - unrelated - These photos illustrate the additional throttle linkage that adapts US Yanmars to the US standard which is 'pull throttle to slow down'.

double hunter · Jul 30, 2012

Here's where I am, got tractor running today, well, half way, running on one cylinder, not getting fuel from injector pump on one line, could not adjust speed of tractor with fuel control, tractor running at fairly high speed, did not let this do this very long, anybodu have any ideas, I think its the injector pump, but i'm just a shade tree tinkerer

winston1 · Jul 31, 2012

Sounds like the rack and or plungers on your injector pump are sticking. If you decide to pull the pump to free it up I believe you will need to remove the inspection plate above the pump to access the linkage connected to the rack being careful not to damage the fragile governor linkage. Do I know this is your problem? No. http://www.hoyetractor.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=HTE&Category_Code=YM2000FUELSYS