rpm on mmm

dunnp650 · May 2, 2011

I have a bx 2660 and what rpm should I run on belly mower thanks in advace

TripleR · May 2, 2011

I run mine at 2900-3000 as I am pretty sure the 540 requirement.

There is an old thread on here or two.

Danner · May 2, 2011

According to my BX2660 manual, the rated MID-PTO shaft speed of 2500 RPM is achieved with the engine running at 3043 RPM.

Incidentally, the rated REAR-PTO shaft speed of 540 RPM is achieved with the engine running at 3142 RPM.

And, the engine's rated performance (i.e. 25.5 BHP) is achieved at 3200 RPM.

mlange2009 · May 2, 2011

also have a 2660 running only around 1850-1900 but also not going through,thick stuff,never had a problem

SPYDERLK · May 2, 2011

All the way against the throttle stop. Whatever rpm that is.
larry

ashdump · May 2, 2011

I run mine at about 2650. I don't think there's any wrong answer. I was always told to run your engine at the speed that get's the job done. No sense of running wide open if you don't have to.

Now, on an air cooled engine, WOT while under a load is a good idea for cooling reasons, but with a liquid cooled, that's not really an issue. If you are lugging it and the temp gage goes up a little, simply increase the throttle or select a lower gear.

CompactTractorFan · May 3, 2011

I usually run anywhere from 3200 (PTO speed) to WOT...

powerstroke444e · May 3, 2011

WFO as mows the best and that is were they are made to run. Everything I own needs ran that way. If i see anyone doing any less on any of my equipment they get an @$$ chewing. That goes for everything from the weedeater to the combine

Johnbro · May 5, 2011

I agree with PowerSTroke...cut quality in mowers has a lot to do wtih blade tip speed (of course a sharp blade is most important). Run it WFO for maximum blade speed.

ashdump · May 5, 2011

Johnbro said:
I agree with PowerSTroke...cut quality in mowers has a lot to do wtih blade tip speed (of course a sharp blade is most important). Run it WFO for maximum blade speed.

If travel speed and blade speed are matched throughout the RPM spectrum, then (in theory) the blades should be engaging the grass for the same ammount of time at any RPM.

I cannot visually tell the difference between cut quality with pedal to the floor @ 2650 or pedal to the floor WOT. If I rev the engine up and slow the travel down, I can tell the difference, but it is not worth traveling slower to get it.

At any rate, the cut quality for me running @ 2650 is so nice that IMO, there's no need to tax the engine/driveline/implement and me anymore than I need to. Also, according to the fuel consumption chart, it's running most efficient in the band between about 2000 and 2800 RPM.

@ 2650, the ride is better, reaction times are better and you really don't lose anytime (negligible at best)

Just my $.02