Mowing B2920 Mid mount Mower What Engine RPM?

[iplumb]

Picked up my B2920 yesterday. Getting ready to mow with the 60 MMM today. It doesn't say in the manual what RPMs the engine should be run at to get the appropriate MMM RPMs. What should it be run at? Thanks

 

[Evil the Weasel]

You're right, it doesn't say. Mine is perfectly content at 2200 rpms though. If you crank it up more, it doesn't really accomplish anything other than increased vibration and fuel consumption.

 

[Renob]

There is usually a mark on the tach for PTO speed. Not sure if the 2920 has one. If it does, this is the engine speed to run an implement such as a mower.

 

[medicshawn]

I'd look for a mark, but in the specs it also usually says it makes 30 Hp at X RPM.

 

[BrierPatch]

I run mine at 2200 rpm. I believe the 540 pto mark is at 2500 rpm.

 

[SGStriglos]

When my dealer delivered my 2920 150hrs ago he told me to run it wide open to get the tips of the blades rotating as fast as I could. He also said that it will in no way hurt to the engine to run at WOT. Wide open on mine is about 50rpms above the PTO Range. Enjoy your new tractor!

 

[nra4ever]

on page 17 the manual it states "do not operate the tractor at full speed for the first 50 hours"

 

[SGStriglos]

on page 17 the manual it states "do not operate the tractor at full speed for the first 50 hours"

My dealer who is a 3rd generation farmer and has had a rual Kobota only dealership since the late 70's said not to worry about that.....I specifically asked him your same question. Have you asked your dealer this question. You wrote him a large check.

 

[Ed_Indiana]

I mow at 1800 to 2000 RPM with my B7800 / 60 inch mid mount mower. My B7800 has always done perfect in this range. I grease the deck & sharpen my blades after 10 hours of mowing.

 

[Charlesaf3]

I run it at pto speed. Probably be fine lower at 2200, but I'm hoping faster will chop up the grass more for mulching purposes. No idea if this is true - seems logical, but that's not the same as testing...

 

[Fritzy]

I was told to run my 3030 wide open, I believe this is true for any lawn mower.

 

[iplumb]

Haven't been real impressed with the cut. But I did try PTO speed today and it did much better! I Just worry about the 50 hr break in stated in the manual!! I'm pretty sure Kubota knows this motor better than my dealer

Oh and did you guys get belt dust on your deck the first use? I assume its just the new belt breaking in?

 

[TripleR]

Prior to the 50 hour mark, I have run all my mowers at about 85 to 90 percent and after that at full throttle without any problems. A faster blade tip speed is going to result in a better cut or at least that has been my experience. To get a good cut at lower tip speed you need to cut your ground speed, so the faster the tip speed, the faster you can go. I like tractors as much as the next guy, but if I can cut down my time in the seat a little I am going to do it. I am too old to sit in the hot sun any longer than necessary. Now when I get in my cabbed tractor, I don't much care.