Register free!

The Green Industry's Resource Center



Reply
 
Thread Tools   Display Modes
  #1  
Old 06-14-2002, 01:36 PM
Stratmosphere Stratmosphere is offline
LawnSite Member
 
Join Date: Jun 2002
Location: New York
Posts: 1
Upgrading Engines on ZTR

Having just purchased a brand new SCAG 48" ZTR, I was amazed at the fact that the largest motor was a KAW 21 HP. After watching way to many episodes of "Home Improvement" , I just want more power !!

The CID on these motors is the same, so how do you mod these engines to spec out to the higher HP ratings ?

Any insite or help is appreciated, as I am sure there is someone out there that sells high performance parts.
Reply With Quote
  #2  
Old 06-15-2002, 06:24 PM
Alan Alan is offline
Member
 
Join Date: Mar 2000
Location: NW Vermont (Milton)
Posts: 1,185
Why?

I can't imagine 21 hp not being adequate for a 48" deck. 25 seems to do fine on a 60" on my Exmark. If the machine is new you would void your engine warranty (at the least) and possibly the warranty on the entire machine. What would you hope to gain by having more power available? You can probably already go faster than the blades can cut without blade speed falling off.
Reply With Quote
  #3  
Old 06-15-2002, 11:28 PM
John DiMartino John DiMartino is offline
LawnSite Silver Member
 
Join Date: Jan 2000
Location: Walden,NY
Posts: 2,555
21 on a 48? thats plenty.The Kwi 21 is as strong as the Kohler 23 IMO,so youve got plenty of power.The 23& 25 Kawi are 681 CC's I think the 21 is 640 cc's.
__________________
My Equipment Pictures
Reply With Quote
  #4  
Old 06-16-2002, 12:48 AM
Doc Pete Doc Pete is offline
LawnSite Gold Member
 
Join Date: Mar 2002
Location: New Jersey
Posts: 3,469
Well, in any event, the 19,21, 23 and 25 are all the same mounting and size, so switching is just a matter of dropping in the new motor. However, 21hp on a 48" deck really should be enough, even running double blades. I'm running a 25hp on my 54" WB with velky and doubles at 7mph and the motor never changes rpm.
Pete
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 10:26 PM.

Page generated in 0.06614 seconds with 7 queries