rpm does not go over 2000

[tstyron-HT]

I have a YANMAR 155D. It does not go over 2000 rpm.

 

[Norm-HT]

More info needed. List everything you have checked so far.

 

[tstyron-HT]

Placed new air filter, placed new fuel filter. Put in new diesel fuel.

That's about it.

 

[Norm-HT]

Check throttle linkage, up to and including fuel pump rack for full movement , side to side, when throttle is opened.

 

[alan-HT]

You get the same upper limit from the hand throttle, the foot throttle, and both together?

If you turned the fuel-filter shutoff to OFF to avoid leaks while changing, did you turn it back to the full ON position?

 

[tstyron-HT]

Norm, I'll check the linkage tonight

Alan, Yes I get the same RPM both from the foot throttle and the hand throttle. Yes the fuel filter is in the full ON position. But will re-check that also.

 

[tstyron-HT]

Still have the same problem and another one. When I drive the tractor I 1st gear and put any type of load IE, dirt in the bucket, go up a very small hill. The engine slowwwwwwws down and is almost impossible to keep the engine running.

Also kind of hard to start.

Any ideas?

 

[Norm-HT]

Throttle linkage???????? All you have is air in/out, fuel and compression. Easy things first.

 

[Aaron-HT]

Does the tractor start easily? Did you just buy the tractor or when did it start doing this?

 

[PaulW-HT]

Sounds like a governor problem.