Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #1  

My Hoe

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560
Location
NYS--Various Parts
Tractor
Kubota B3000HSDCC, BH77, 5' Belly Mower, 6' Hyd. Angle Plow
Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

Hi all,

I have read that one should have 5hp. for every foot of mower-span--but I'm not sure if this applies just to THP mowers, or to MMM, as well?

I am a fan of the "old" (discontinued in, I believe, 2012) "Premium B" series, comprised of the B2630 and the B3030 (and it's cabbed variants).

I prefer the B2630 because I tested one, and it's 3-cylinder engine was even smoother than the BX25's 3-cylinder I tested. (IIRC, the B2630 I tested--at 67 hours--went into service about 2007, and the BX25 was newer, but not the 2014 BX25"D", with all of it's improvements, like Kubota's proprietary "QA", etc...) I tested these tractors in 2010, IIRC.

I am leaning toward the B2630, but have never tested a B3030. However, I've read that some B3030's might suffer from the four-cylinder vibration problems reported in some of the B3000 and B3200-series machines (no offense to those owners, and I understand that reports vary, and that there are many of these B3000, B3200 and especially, B3030 owners, that have NO vibration complaints).

I just do not like excessive vibration. It's a personal quirk/failing/idiosyncracy and I've accepted it, so I hope you all can, too. :D

I also like the B2630 for it's smaller displacement (68.5 cu. in. vs. 98.5) as most of my usage will be FEL, BH and forks. However, I will have to mow the portion of our 1.8+ acres that are not covered by our 36' x 38' barn, four-car garage, house and outbuildings. Most of it is quite flat, but there are trees, the aforementioned buildings, and 2-3 additional outbuildings, which is why I prefer the MMM, despite the mounting hassles. IOW, I feel I'll hit less buildings, with a MMM setup, than I would with a TPH model. Plus, my neck doesn't turn around backwards as far as the rest of the humans.... :laughing:

However, I believe I want the 6' MMM, instead of the 5' MMM, for quicker mowing time, and possibly being able to get in closer to obstacles, with the wider mower.

I have seen B3030's with 5' MMM's, and B2630's with 6' MMM's--and vice versa.

My Questions:

1. Is the B2630's 19.5 PTO hp. enough for a 6' MMM, given that I want to mow infrequently, at the 12"-14" stage?


2. Should I go with a B3030, given it's 23 PTO hp. if I want a 6' MMM?

Please keep in mind, before you answer, that I am not "precious" about my "yard/lawn" and, given that I will have to remove the FEL and BH to mow, I don't want to mow every week--I'd be happy not mowing for 2-3 weeks, until it gets tall enough to worry about the Town's Code Enforcement Unit--I just have too much to do in my life to manicure my lawn for others to look at. And I don't see it--it's just green. When it gets too tall, so that it wets my shoes with dew, or risks getting ticks on my dawg, then it's time to mow.

So...is the B2630's 19.5 hp enough for a "high grass mowing" (think 12-14" or more) or do I need the B3030's 23 PTO hp. for this duty, to run a 6' MMM?

And I do realize that, at 23 PTO hp., even the B3030 does not match the "5 hp. per foot" rule, as it would have to have 30 PTO hp. to do this--and it does not.

Also, does a MMM require MORE, or LESS, hp. per foot, than a TPH-mounted mower, all other things being equal? Or doesn't it matter?

And please--don't spare my feelings--if I've overlooked something in this calculus, please "fire away"--I'm here to learn, not make myself feel good.

Thanks, very much, in advance.

My Hoe
 
   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #2  
Re: Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

I run a 3PH 6 footer on a 26 hp Cub Cadet gear model and it works flawlessly. I tried the same mower on my L3940 Hydrostat and it did NOT work well at all, it would bog and almost kill the engine.

Is you machine gear or hydro?

Good luck, Fred
 
   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #3  
Re: Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

I ran a 48" brush hog on the back of my B3030 and felt--in my opinion--that it was under powered.
 
   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #4  
Re: Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

Mom has a B3030 and it is very smooth running tractor vibration wise. Find one and try it before you get too commited to the B2630. Its never lacked for power but we just use it for tilling in her flower beds,she had a large number of flower beds.....
 
   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #5  
Re: Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

The 5 hp per foot of mower is a good "rule of thumb" but certainly not inviolate. It can depend on both the height of the weeds and grass you're mowing, as well as the thickness of same. And of course, if need be, you don't have to mow the full width of your mower; i.e., you can mow 3' swaths with a 6' mower, but of course if you have to do that all the time, you defeat the purpose of the wider mower.
 
   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #6  
Re: Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

We have a Kubota B2710 27HP with 20HP at PTO and run a 72" MMM without any problems. Also run a 60" Bush Hog cutter on same tractor.
 
   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #7  
Re: Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

Is the MMM SIDE Discharge? If so I believe you'll need the extra power. It takes a toll getting the cuttings from one side to the other. I comfortably run a 5' FM with REAR discharge using 17.5hp (that's 3.5hp/ft) for what its worth.
 
   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #8  
Re: Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

Is the MMM SIDE Discharge? If so I believe you'll need the extra power. It takes a toll getting the cuttings from one side to the other. I comfortably run a 5' FM with REAR discharge using 17.5hp (that's 3.5hp/ft) for what its worth.

Our 72" Kubota MMM is side discharge and will throw cuttings at least 12-15 ft.
 
   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #9  
Re: Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030

I run a Woods RD7200 rear discharge finish mower on my Ford 8N, anything over 8" and it struggles and bogs. I run a Woods RD7200 rear discharge finish mower on my L3940HST, 8" is fine, will not bog. If the grass is taller than 10", I use a Land Pride RCR1272 bush hog, as the finish mower does not provide good quality cut. If you are waiting till your grass is 12"+ to cut, I would use a bush hog (in my experience). Good luck. Philip.
 
   / Is the "5hp. per Mower-foot" Rule Inviolate? Want a 6' MMM on a B2630 vs. B3030 #10  
I have a bx1860 with a 48" mmm and a 48" big bee brush hog. The mmm is powerful and the brush hog is ok. It may have to do with mmm rpm being higher?
Bx1860=18hp with 15pto
 

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