Iseki ts1610 over revs

Drskint · May 6, 2016

When I start the tractor it goes to full throttle and won't come down. Throttle linkage is good and moves freely. I think it is caused by the governor but have no idea where to look. Any advise would be helpful.

fxrs55 · May 7, 2016

Check the engine oil level. Is engine sucking the oil out of the crankcase ?

Ilikeurtractor · May 7, 2016

If it's internal to the governor and rack linkage that would be a problem I wouldn't be looking forward to fixing and will require a fair amount of disassembly just to get at if the Isuzu engine is anything like the Mistubishis in the smaller tractors. If it is running on oil from the crankcase that would be scary. The good news is the TS1610 uses an air shutoff butterfly to kill the engine so I wouldn't be too far from that at any given time until you know for sure. To test this, shut off the fuel valve after starting the engine and if it keeps running after 30 seconds or so then you ought to pursue this. From the few stories I've heard about this happening, and they were diesel engines sucking up vapors through the air filter, the engine usually ends up revving much higher than it is normally capable of. I heard this was a contributing factor to Deepwater Horizon's demise. Sounds like yours is just going to service speed though which makes me think it is purely in the rack setting. Make sure the lever arm on the fuel pump is not slipping on the shaft.

Drskint · May 7, 2016

Ok I shut the fuel off and started it. It ran at full RPMs for about two minutes and then died.

Drskint · May 7, 2016

Lever arm is not slipping

Drskint · May 7, 2016

Now do I have to bleed the injector pump?

Drskint · May 7, 2016

The oil level is unchanged

Drskint · May 7, 2016

Ok I didn't bleed the lines
Just turned the engine over about twenty seconds with the choke pulled
Let it rest a bit put choke in and it started normally. No over reving
I don't know what problem was but its fine now thanks for your help

Ilikeurtractor · May 7, 2016

Glad to hear things are back to normal - hard to say what was happening based on the description. I think the "choke" you are referring to is the control handle for the air intake butterfly that shuts off air to the engine. You only need to bleed air to the injector pump if it enters into the line going to the pump. Just shutting the valve to it should not allow air to enter. A lot of diesel engines have a solenoid valve going to the pump that accomplishes this to stop the engine. I wouldn't have thought it would take 2 minutes to kill the engine in this case.