Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #31  
Old 08-20-2013, 11:54 PM
CurbAppealKS CurbAppealKS is offline
LawnSite Senior Member
 
Join Date: Mar 2013
Location: Wellington, KS
Posts: 448
Yes green you are right. I don't have the truck any more.
Reply With Quote
  #32  
Old 08-21-2013, 12:26 AM
greenology's Avatar
greenology greenology is offline
LawnSite Senior Member
 
Join Date: Oct 2012
Location: Sydney, Australia
Posts: 811
Quote:
Originally Posted by doublesharp View Post
I'm kinda anal about numbers and accuracy. I'm sure my time was within 10 seconds and I'm sure that the tank was full when I started and full when I filled up again.

I used a 1/2 gal plastic pitcher marked in 8 oz increments and I was careful to measure accurately and poured the gas through a funnel slowly, without spilling any and shook the tank until it was absolutely full. It may not be accurate to the fraction of an oz but it I'm confident the numbers are close and that the mower uses well over 1/2 gal in 15 minutes in easy grass at wide open throttle going as fast as my butt and the turf can stand.
Hey mate,

I would suggest doing the test over a longer period of time to get a more accurate indication. At least an hour for example, but even better a couple hours. Gives a better indication of real world mowing, taking into consideration more variables. 15 mins of mowing conditions can vary to the next 15 mins.

Also as u suggested the engine is new, so I wouldn't expect great numbers while everything is tight.
Reply With Quote
  #33  
Old 08-21-2013, 07:45 AM
puppypaws's Avatar
puppypaws puppypaws is offline
LawnSite Fanatic
 
Join Date: Jul 2004
Location: Marshville,NC 28103
Posts: 7,756
Quote:
Originally Posted by Ridin' Green View Post
Didn't puppy post a while back that Kawi told him they are working on their own closed loop system?
Kawasaki told me they were working on their own hybrid system, but I talked with them a few weeks back and this has been dropped for the time being, or at least that is what this one person said. Accuracy of either of these statements is not be something I would bet money on.

Quote:
Originally Posted by CurbAppealKS View Post
Wasn't aware of that. How is the fuel metered?
ProStreet gave a good answer to your question.
__________________
Farm Mower
Reply With Quote
  #34  
Old 08-21-2013, 08:34 AM
doublesharp doublesharp is offline
LawnSite Senior Member
 
Join Date: May 2001
Location: S.Indiana
Posts: 264
Quote:
Originally Posted by greenology View Post
Hey mate,

I would suggest doing the test over a longer period of time to get a more accurate indication. At least an hour for example, but even better a couple hours. Gives a better indication of real world mowing, taking into consideration more variables. 15 mins of mowing conditions can vary to the next 15 mins.

Also as u suggested the engine is new, so I wouldn't expect great numbers while everything is tight.
I agree to a point. The 2nd test I did was as easy as mowing gets. Short dry grass on level turf. There will never be any easier conditions and it still burns 2.19 gal per hour. If I went a couple hours I'd wear myself out pouring gas from the can to my measuring pitcher and then into the mower's tank.

It's not such a big deal for me because I only mow about 4 acres per week and while it uses a good amount of gas I also get finished quickly and I love the way the mower cuts and powers through anything.

Since the tank is full to the brim now I'm going to do 1 more test and will go 30 minutes. There will be about 1/3 acre up and down a light slope and then about 1/2 acre of pool table flat with med growth. I'll cut at 3.5"/3.25".
__________________
Big Wheels in the back
Little Wheels in front
It's downhill all the way
Reply With Quote
  #35  
Old 08-21-2013, 12:46 PM
puppypaws's Avatar
puppypaws puppypaws is offline
LawnSite Fanatic
 
Join Date: Jul 2004
Location: Marshville,NC 28103
Posts: 7,756
Quote:
Originally Posted by doublesharp View Post
I agree to a point. The 2nd test I did was as easy as mowing gets. Short dry grass on level turf. There will never be any easier conditions and it still burns 2.19 gal per hour. If I went a couple hours I'd wear myself out pouring gas from the can to my measuring pitcher and then into the mower's tank.

It's not such a big deal for me because I only mow about 4 acres per week and while it uses a good amount of gas I also get finished quickly and I love the way the mower cuts and powers through anything.

Since the tank is full to the brim now I'm going to do 1 more test and will go 30 minutes. There will be about 1/3 acre up and down a light slope and then about 1/2 acre of pool table flat with med growth. I'll cut at 3.5"/3.25".
I appreciate you sharing this truthfully, but as you can see from these numbers there is no reason to buy the DFI when in reality it appears to be worse in fuel economy than the same size carburetor engine.

I would have Kawasaki look into this, this is very bad advertisement for an engine they are attempting to sell at a higher price while making people believe it will pay the difference in fuel savings while producing more power.
__________________
Farm Mower
Reply With Quote
  #36  
Old 08-21-2013, 01:20 PM
doublesharp doublesharp is offline
LawnSite Senior Member
 
Join Date: May 2001
Location: S.Indiana
Posts: 264
Just completed test #3 and the results were the same as #1. 2.4375 gallons per hour. I did 15 minutes again to keep it consistent and I didn't have 30 minutes worth of mowing to do. It took 78 oz to cut for 15 minutes, full throttle, as fast as my butt could stand. The mower would have gone a little faster but I was moving pretty good.
__________________
Big Wheels in the back
Little Wheels in front
It's downhill all the way
Reply With Quote
  #37  
Old 08-21-2013, 01:42 PM
puppypaws's Avatar
puppypaws puppypaws is offline
LawnSite Fanatic
 
Join Date: Jul 2004
Location: Marshville,NC 28103
Posts: 7,756
Quote:
Originally Posted by doublesharp View Post
Just completed test #3 and the results were the same as #1. 2.4375 gallons per hour. I did 15 minutes again to keep it consistent and I didn't have 30 minutes worth of mowing to do. It took 78 oz to cut for 15 minutes, full throttle, as fast as my butt could stand. The mower would have gone a little faster but I was moving pretty good.
These are really high consumption numbers. The numbers you are producing is equivalent to the older 37's without fuel injection, and they were really bad.
__________________
Farm Mower
Reply With Quote
  #38  
Old 08-21-2013, 02:11 PM
ProStreetCamaro's Avatar
ProStreetCamaro ProStreetCamaro is offline
LawnSite Gold Member
 
Join Date: Apr 2004
Location: Gaithersburg Maryland
Posts: 3,768
Quote:
Originally Posted by doublesharp View Post
Just completed test #3 and the results were the same as #1. 2.4375 gallons per hour. I did 15 minutes again to keep it consistent and I didn't have 30 minutes worth of mowing to do. It took 78 oz to cut for 15 minutes, full throttle, as fast as my butt could stand. The mower would have gone a little faster but I was moving pretty good.


Here is my suggestion. Run the tank dry. Then put 1 or 2 gallons of fuel in it and run it dry again and time how long it takes for it to run dry. That is going to be the most accurate method of figuring out the fuel usage. If your numbers are correct that is really bad fuel usage. Honestly that is WAY more engine than a 60" mower could ever possibly use even with a deck powered rear bagger. Im not really sure why they would even put an engine that big on a 60" mower.

How many hours are on the mower? It can take up to 100 hours before the engine, hydros and spindles fully break in and loosen up. Once they do your fuel usage should improve a little but it wont be much. Maybe .2gph or so. Maybe try putting a tach on it to see what rpm's it is running at. If it is running too fast that will increase fuel consumption also but most of the time they end up actually running slower than they are supposed to be. All of my mowers were slower than what they are rated for so I turned them all up.
__________________
2013 Gravely 460Z 29EFI
2011 Gravely 36GR
2008 Gravely 160Z
2004 Gravely 34Z
1998 Lazer Z HP 48 (old faithful)
Reply With Quote
  #39  
Old 08-21-2013, 04:42 PM
jkilov's Avatar
jkilov jkilov is offline
LawnSite Bronze Member
 
Join Date: Apr 2008
Location: MS
Posts: 1,292
Run a couple of tanks noting the fuel added each time then divide by cumulative number of hours.

2 gph is horrible, my 26hp/61" does 1.1-1.3 gph.

They are working on a closed loop system ??? Give me a break. Kawasaki makes motorcycles, locomotives and ships yet they can't perfect a lawnmower engine. Sheeees.....
__________________
F-250 5.4 V8 stand. cab, tandem trailer
Ferris IS3100Z 61" L Kaw, Hydrocut 36" 13hp Kaw
Shindaiwa T3410, EB8520 Maruyama HT2300, MS047
Stihl FC85, MS192T, 041AV, MS200
Redmax HBZ2601

Reply With Quote
  #40  
Old 08-21-2013, 05:32 PM
greenology's Avatar
greenology greenology is offline
LawnSite Senior Member
 
Join Date: Oct 2012
Location: Sydney, Australia
Posts: 811
Quote:
Originally Posted by ProStreetCamaro View Post
Here is my suggestion. Run the tank dry. Then put 1 or 2 gallons of fuel in it and run it dry again and time how long it takes for it to run dry. That is going to be the most accurate method of figuring out the fuel usage. If your numbers are correct that is really bad fuel usage. Honestly that is WAY more engine than a 60" mower could ever possibly use even with a deck powered rear bagger. Im not really sure why they would even put an engine that big on a 60" mower.

How many hours are on the mower? It can take up to 100 hours before the engine, hydros and spindles fully break in and loosen up. Once they do your fuel usage should improve a little but it wont be much. Maybe .2gph or so. Maybe try putting a tach on it to see what rpm's it is running at. If it is running too fast that will increase fuel consumption also but most of the time they end up actually running slower than they are supposed to be. All of my mowers were slower than what they are rated for so I turned them all up.
This is all very good, try to follow this if you can! I would only add that if you can try to get at least the 2 gallons in and run the mower.

The longer time the test is performed the more accurate the number is.

After all we don't use our machines for 15mins and then never use them again. we use the for 3000hrs

The average usage over a 20 hr period will be different from the average usage on 15-30 minutes, but it will give you an idea.

Also Im sure that with everything being new its creating higher numbers.

Unless the RPMs are high or the mixture is too rich.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 04:18 AM.

Page generated in 0.09304 seconds with 7 queries