Throttle is getting wonky...

[acohen100]

I was trying to do some chipping today and noticed that the chipper was bogging down. I checked the RPMs and they had slid down from 3100 to about 2800. I kept increasing the throttle but every time I did it would start at, say, 3100 or so but then quickly drift back down to the 2800-2900 range until, eventually, I had the throttle wide open. This was making it difficult to run the chipper and I stalled several times.

Any ideas?

BX24 with about 80 hours.

 

[jruss]

Pull the battery cover and look for the throttle linkage on the right side of dash (under the lever). There is a nut that you can adjust to increase the tension on the throttle, just sung up until the throttle holds the set speed.

 

[milkman]

If you had the throttle lever all the way open and the rpm still was dropping with no load or light load, time to change the fuel filter.

 

[Soundguy]

I agree with milkman... If the lever is not slipping, and you are actually having to max the throttle to keep it going, and it still bogs down.. then look for a fuel delivery issue.

soundguy

 

[charlz]

It doesn't sound like it is the lever nut... my b7100 does this (haven't gotten around to fixing it) and the lever vibrates down to the lower RPM setting. I just keep pulling the lever back to where it needs to be. Reading acohen100's post it doesn't sound like this is the case, sounds like he had to give it more and more throttle to keep the same RPM's not just keep moving the lever back to its original postion.

 

[acohen100]

With the throttle lever pegged to the right I could get it to hold at around 3100. I think max RMP for this model is around 3400. Could it be bad gas? I have been using the same 5 gal of diesel all winter.

 

[milkman]

I think the top rpm on mine is lower than 3400, but I'm thinking 3280, not sure at the moment. I've not had a problem with dirt in the fuel, but with the small filter before the pump, just a small amount of moisture will plug it up an cut the flow of fuel even if there is just a little visible in the filter.

 

[acohen100]

Is there a diesel additive that removes water like there is for gasoline engines that I can try? I use Power Service routinely, but I don't think that it removes moisture.

 

[Soundguy]

The red bottle might.. i'm not sure if it has an emulsifier or not..

soundguy

 

[milkman]

I got some off road diesel to save a few cents per gallon and got a batch of water, I just changed the filter when it started losing power. Went through about five filters that one tank only had to change the filter before the pump, the one under the floor, but I ordered a Mr. Fuel filter and have been using it ever since, no more problem with water even with the rest of the off road that I had bought.