Any news on gas engine CUTS?

[buickanddeere]

Anyone who is cutting 12 to 20 inch grass.

Anyone who is tilling community gardens

Anyone who is snowblowing in WI, MN, or MI snowfalls on wind driven ridges .

Anyone who thinks $15,000 to $35,000 is real money.

The exception rather than the rule .

 

[buickanddeere]

Direct injection solves much of this- can't have preignition if the fuel isn't injected until after the point of pistons relationship to tdc that preignition can occur.


Or there might also be a change in the size and strength of the parts -starting with pistons/ rods

my 554 diesel tractors piston/rod vs. my boats Volvo OHC gas piston/rod compare this way...


Both will run at rated power for a very long time- one at @ 5000rpm @ 9:1 130 hp 130 cu inch

the other @ 2000rpm @16:1 and (only) 55 hp 203 cu inch guess which one is the 55 hp diesel :laughing:



I like the HD low rpm diesel design for tractor work. the gas version works well for a boat engine that needs a much wider RPM operating range

I would think that a gas engine would actually work pretty well for a hydrostatic drive tractor- ( pin the throttle) and go

but if a gear drive- give me a low rpm/large cu inch diesel all the way

I have no idea why Hino wants 23 to 1 compression in a spark ignition engine ? The reason why diesels have such high compression ratios is so hey will start in cool weather .
Going back to the good old days of 1920's Lister Diesel engines . They had a mechanical adjustment to increase the compression ratio for starting. Once the engine was operating the compression ratio was reduced for optimum operation.
I don't know how to get some people to understand that high compression isn't an advantage when operating but a high expansion ratio is very desirable .

 

[buickanddeere]

Obviously your experience is with sparse grass. I cut 5 to 8 inch bluegrass all the time and it is thick and lush and that cettainly doesn't challenge my engine like the tall wetlands grasses do. There is no way my zero turn could cut that area without frequent cool down breaks and a need for triple cutting.

No need for cooling down breaks if the cooling air flow is not obstructed .

 

[SPYDERLK]

I'm with you.. I have a z turn 22 hp Kawasaki .. I cut about 5 acres of grass..
Run the engine wide open for hrs..Wide open is the way they are designed to run..
Never burn up the oil or run hot.. Mine is an air cooled engine

I have heard of this super duper tough grass ,that some have.. I understand no gasoline engine can stand the stress of cutting it

Full governed rpm is not wide open unless its at full load. Hard to determine full load til it starts to bog down a little.

 

[kenmac]

My diesel tractor also has a governor ... Mine will kick in under load..

The Kawasaki runs as wide open as it was designed by the manufacture ...The Kawasaki will hit the governor at times

 

[GManBart]

Who uses a CUT or SCUT at max rated rpm and at full rated power for hours at a time. If you do , you purchased a hobby tractor that is two or three sizes too small. The typical small tractor is a 50 to 100hr a year machine performing puttering around jobs. If somebody has set out with a 2x14 plough into a 100 acre field . The operator is overly optimistic .

That entire post is either wrong, or a complete guess.

Lots of people with SCUTs and CUTS run tillers for food plots, or rotary cutters for brush cutting, or snow throwers...all of those can be for hours on end. If they don't have big fields, they don't need big machines, so the idea they bought a machine too small is simply wrong.

Your guess of 50-100 hours per year is a guess. There are no hard stats on that I've ever seen posted, but I've looked at a lot of used CUTs machines that averaged well over 100 hours per year. In fact, to prove how silly this statement was, I just went to Craigslist, did a search on Kubota and Deere and looked at what came up for SCUTs/CUTs (ads with year and hours listed).

2013 L3540 with 480 hours.
2005 BX2230 with 645 hours.
2013 L4600 with 95 hours.
2004 L5030 with 1054 hours.
2011 B2920 with 465 hours.
2004 JD 4210 with 2500 hours.
2014 JD 1025R with 50 hours.
2008 JD 2305 with 769 hours.
1998 JD 4200 with 838 hours.

That's a low of 50 hours a year, and a high of 240 hours a year. So sure, some folks run their SCUTs and CUTs 50-100 hours, but plenty of folks go well over that. Saying they're just "puttering around" is yet another guess on your part. You aren't there, you haven't seen, so you really can't say how they're using the machines.

 

[GManBart]

I dont know about that. My BX1500 works for a pretty significant part of its time at full load.

With HST its easy to hold absolute full load at the bog point in mowing, snow throwing, climbing hills, etc. It also runs about 90% running our pto gen during a power outage. It has 2100hrs and uses right at a gallon an hr at full load.

I don't see how our points disagree. I'm sure plenty of folks run their machines at/near PTO speed for extended periods of time, but some folks don't seem to believe that. I still think big Ag machines are going to be built heavier and more durable per rated horsepower, but I don't think that takes anything away from SCUTs/CUTs.

 

[Hinomotoman]

I don't know which it is. They only sell one kind around here. Interestingly enough, off road diesel is $2.39.

Eugene

You must be in the indiana/ohio area or the South. Very attractive pricing. And it will be declining further.

Do you know if what you got was premium or not (both are ultra low sulphur) . . but the premium diesel is just a nickel or a dime higher but has cleaners and increases mileage.

 

[Hinomotoman]

I can't say it any plainer.

Eugene

Please tell us your point .

 

[SPYDERLK]

I dont know about that. My BX1500 works for a pretty significant part of its time at full load.

With HST its easy to hold absolute full load at the bog point in mowing, snow throwing, climbing hills, etc. It also runs about 90% running our pto gen during a power outage. It has 2100hrs and uses right at a gallon an hr at full load.

I don't see how our points disagree. I'm sure plenty of folks run their machines at/near PTO speed for extended periods of time, but some folks don't seem to believe that. I still think big Ag machines are going to be built heavier and more durable per rated horsepower, but I don't think that takes anything away from SCUTs/CUTs.

You might be right, but from the Kubs we have Im not seeing inferiority in the duty cycle at 100% load supported by the smaller sizes. For sure, my smallest tractor sees 100% load in a greater proportion of its life than do the gear tractors. Just hold the pedal right at the bog point.