Engine Horse Power not as advertised

BillyTee

New member

Equipment
Kubota M6000 Tractor
May 8, 2025
1
0
1
Sanford, NC
We are finding out that the advertised horse power is not correct.
We were expecting 70 advertised horsepower from a 2022 tractor,
but tests show it only produces 46 horsepower.
Is this correct?
Advertised vs Actual?
 

Yooper

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Lifetime Member

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3901 LA525
May 31, 2015
1,603
725
113
NE Wisconsin
Flintnapper pretty much sums it up. How was the hp measured? PTO, crankshaft, at the drawbar? What kind of dynamometer was used for measuring? Were the numbers calculated for temperature and atmospheric pressure? How many hours on the engine?
 
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TheOldHokie

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L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Apr 6, 2021
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windyridgefarm.us
We are finding out that the advertised horse power is not correct.
We were expecting 70 advertised horsepower from a 2022 tractor,
but tests show it only produces 46 horsepower.
Is this correct?
Advertised vs Actual?
Your profile lists an M6000 - is that the tractor? I can't find any Kubota with that model number. Is it perhaps an MX6000? If so Kubota claims 60 net engine HP and 52 PTO HP.

Kubota quotes both gross and net flywheel HP for their engines. What are you measuring and how?

Dan
 

D2Cat

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L305DT, B7100HST, TG1860, TG1860D, L4240
Mar 27, 2014
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40 miles south of Kansas City
We are finding out that the advertised horse power is not correct.
We were expecting 70 advertised horsepower from a 2022 tractor,
but tests show it only produces 46 horsepower.
Is this correct?
Advertised vs Actual?

"Remember the quality of your question directly affects the quality of your answer."
 
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lynnmor

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B2601-1
May 3, 2021
1,501
1,247
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Red Lion
Here is a video about recent developments in horsepower variation. While it may not exactly pertain to the OP's question it will give some information about the nonsense that is going on.
 
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North Idaho Wolfman

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Jun 9, 2013
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Sandpoint, ID
We are finding out that the advertised horse power is not correct.
We were expecting 70 advertised horsepower from a 2022 tractor,
but tests show it only produces 46 horsepower.
Is this correct?
Advertised vs Actual?
Nowhere near enough information to even help you out!
 
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BBFarmer

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L3560HSTC-LE LA555 FDR1672 BB1272 SoldL3301HST
Jul 12, 2024
291
540
93
Terry, MS
Dang it Billy! Now look at what ya done did...... we got no dagnabit info :ROFLMAO:

Reckon the feller done got lost out yonder ways!! LOL
 

armylifer

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Mar 26, 2013
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He spent 11 minutes on the forum and then disappeared. I hope that he comes back with more information. Maybe he got sidetracked.
 

RBsingl

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Equipment
Kubota F 2690 72" rear discharge deck, Deere 955
Jul 1, 2022
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Central IL
I suspect his computer power supply was not as advertised so he is unable to develop sufficient power to make another post 🤣

For a fun look at horsepower, take a look from the late 1960s into the earliest years of the 1970s when SAE starting rating HP using the engine installed in the vehicle with all standard driven accessory items, exhaust system, etc. instead of the gross HP which was the bare engine on a stand. Some manufacturers advertised dual ratings for a couple of years and car/truck engines with a gross HP in the 300+ range were making only slightly over 200 HP in operational form. For example the hottest engine in a 1971 Corvette was a 454 rated at 425 HP however the SAE net rating was 325 HP while the base 350 CID engine was 270 gross/210 net.

The electronics industry was even worse with the low end manufacturers rating their audio gear using the IPP (instantaneous peak power) method. Basically output was measured with a scope with the preamp gain set to max and a transient event was created (typically dropping the tonearm on a record). The scope captured the peak which sometimes was the last sound that particular unit ever made. It wildly overstated the practical audio output capability which was often around 1/10th of IPP power.

Rodger