Yanmar ym2000 won't start

Bigd9116 · Mar 30, 2015

I recently acquired a Yanmar ym2000 from a friend of mine, he stated that it was running but sat for a yr or so . I attempted to get it started with no luck. Initially the fuel filter housing was low, I cracked the filter and it drew fuel in, I then cracked the discharge lines from the fuel pump, they seemed to pump fuel ok, I then cracked the lines at the injector, they had fuel squirting. I then tried to crack the bolt on top the injectors with the hose between each injector and no fuel would come out, can anyone provide troubleshooting steps as to why it won't start and fuel is not coming from the bolt/hose above the injectors? Also where is the best place to find a parts breakdown or oder parts? The pto shaft seal is leaking thanks for any help!

careyo63 · Mar 30, 2015

Since the Fuel bowl was half empty go through this How to bleed air out of the fuel system Pay attention to#4 no fuel coming out and I believe the line you talking about is just a return to my Tank.

winston1 · Mar 31, 2015

Line on top of injector is only stem leak by. Don't expect flow there.

clemsonfor · Mar 31, 2015

yea there wont be flow at that bolt your talking about. You dont even need to crack the lines near the injectors.

I think you may have a compression problem or battery problem?

How fast is it cranking? Hook jumper cables to it and a running car/truck to boost the power to it. Crank with the Decompression valve flipped on. what color is the smoke comeing out of the stack?

What does the oil look like? The radiator fluid?

clemsonfor · Mar 31, 2015

Since every thing "always runs last time i used it or parked it" why did he say he did not use this tractor in a year or two?

Bigd9116 · Mar 31, 2015

Thanks for everyone's advice I will try to re-bleed the system, what type of battery do you recommend is there something I can pick up at walmart or autozone that will get me by for now what cca or deep cycle?, my expenses are adding up quick since the purchase of this land , I love it just need to spread something outs. I will post back once I try to bleed injectors but may be a week or so, there was a little gray smoke from exhaust while trying to start.

California · Mar 31, 2015

Battery is simply the biggest one that will fit the space. Also cleaning every connection including ground can improve cranking speed. Assisting the battery with jumper cables from another vehicle might be all you need for a first start.

I tried a deep cycle start/marine battery and it failed prematurely. Apparently they can't take the jarring a tractor gets.

Make sure the Thermostart gets hot (manifold warm to the touch), and it receives fuel from the little bowl.

Bleeding is just at filter input, filter out (2 screws on top of the filter) then the screw at the pump input. In that order. No need to bleed beyond pump, the pressure will take care of that.

A little bit of gray smoke does sound like insufficient fuel. Adequate fuel would give white vapor (unburned fuel) or plenty of gray smoke if it will almost run. Yanmar recommends full throttle while starting then drop immediately to 1500 rpm.

I assume you are using the compression release. Crank it with compression released then let go of the release and keep cranking, so the inertia of the flywheel assists the starter.

normde2001 · Apr 1, 2015

Why do you think you need a battery?

clemsonfor · Apr 1, 2015

California is spot on! like he said the manual calls for the throttle to be all the way open on your tractor that is the lever pulled all the way toward you, reverse of american tracors.

Bigd9116 · Apr 1, 2015

The battery failed a load test ad won't take a charge, during initial attempt to start I was jumping it from my truck, I am going to attempt to start tom am using everyone's advice and new battery