Register free!

The Green Industry's Resource Center



Reply
 
Thread Tools   Display Modes
  #1  
Old 05-19-2007, 09:29 AM
jomowz jomowz is offline
LawnSite Member
 
Join Date: Dec 2006
Location: New York Suburbs
Posts: 13
Kawie 21hp needs replacing at 1280hrs ???

My Ex Mark lazer HP has a Kawie 21 hp engine. I have changed the oil every week since I,ve owned it. Filters every 100 hrs. I lost power & have no compression in one cylinder & week in the other . Is it possible the motor is tirid & needs replacing?
thanks, Joe 1280hrs on the motor !!!
Reply With Quote
  #2  
Old 05-19-2007, 01:11 PM
Restrorob's Avatar
Restrorob Restrorob is offline
LawnSite Fanatic
 
Join Date: Apr 2005
Location: Show'n my truck off !
Posts: 10,778
Has it been smoking ?
Have you been having to add oil ?
What kind of numbers are you calling weak ?
__________________
Quote:
Originally Posted by piston slapper View Post
You never learn anything until you admit you don't know it all...
Quote:
Originally Posted by MannsLawnService View Post
some times the man in my mirror isn't so smart...
"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
Reply With Quote
  #3  
Old 05-19-2007, 07:23 PM
jomowz jomowz is offline
LawnSite Member
 
Join Date: Dec 2006
Location: New York Suburbs
Posts: 13
Restrorob, I run that mower about 25hrs per week. No, it hasn't been smoking or using oil at all. We did a lower crankcase gasket on it at 888hrs because it was "sweating" oil around the block which solved that problem. It did seem to be starting harder the past 2 seasons than it did when it was newer.
Do you know the life expectancy of that engine?
thanks, Joe
Reply With Quote
  #4  
Old 05-19-2007, 09:03 PM
Restrorob's Avatar
Restrorob Restrorob is offline
LawnSite Fanatic
 
Join Date: Apr 2005
Location: Show'n my truck off !
Posts: 10,778
Quote:
Originally Posted by jomowz View Post
Do you know the life expectancy of that engine?

Joe,

There are too many variables to the life span of a engine, If this one has been maintained as you stated you may see 1800 or more.

I would suggest removing the valve covers and check/adjust the valves, Kawasaki recommends doing this every 300 hrs. for peak performance but most over look this task.

You could even find a push-rod dropped out of the rocker.

Below is the procedure if you should need it;




Good Luck !
__________________
Quote:
Originally Posted by piston slapper View Post
You never learn anything until you admit you don't know it all...
Quote:
Originally Posted by MannsLawnService View Post
some times the man in my mirror isn't so smart...
"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
Reply With Quote
  #5  
Old 05-19-2007, 11:15 PM
Mowingman's Avatar
Mowingman Mowingman is online now
LawnSite Platinum Member
 
Join Date: Feb 2001
Location: Texas
Posts: 4,462
I have a vert. shaft Kawasaki in my shop now, with 1380 hours on it and worn out. Owner reported loss of power. Found crankshaft and/or block is worn out at the top where the crank comes out the top and the flywheel attaches. There is no bearing, the crank runs directly against the block here, with only an oil seal holding oil in. It is so worn, that the tip off was, that the flywheel was wobbling and hitting against the coils. Can not see any clear evidence that engine ingested dirt. Just wore out.
__________________
Work Safe
Reply With Quote
  #6  
Old 05-20-2007, 02:57 PM
barnard barnard is offline
LawnSite Senior Member
 
Join Date: Jul 2002
Location: central,OK
Posts: 618
Quote:
Originally Posted by Restrorob View Post
Joe,

There are too many variables to the life span of a engine, If this one has been maintained as you stated you may see 1800 or more.

I would suggest removing the valve covers and check/adjust the valves, Kawasaki recommends doing this every 300 hrs. for peak performance but most over look this task.

You could even find a push-rod dropped out of the rocker.

Below is the procedure if you should need it;




Good Luck !
Restrorob, Kawasaki also recommends lapping the valves and cleaning the combustion chambers at 300 hrs ,if memory serves me. Is this necessary in your experience?I have 450 hours on my FH721, and I have set the clearances. Ihaven't pulled the heads and lapped the valves and I'm not totally convinced of its necessity. This is my first kawasaki though and can't base it on actual experience
Reply With Quote
  #7  
Old 05-20-2007, 04:45 PM
khouse khouse is offline
LawnSite Bronze Member
 
Join Date: Feb 2001
Location: lee's summit, mo
Posts: 1,479
Your valves may have been ran so long out of adjustment that you may have a burnt valve. Maybe a valve job will get it going. If you adjust your valves with no success then perform a leakdown test to see if it's a valve or rings that need serviced.
__________________
"If man can make it - man can break it"
Reply With Quote
  #8  
Old 05-20-2007, 04:50 PM
jomowz jomowz is offline
LawnSite Member
 
Join Date: Dec 2006
Location: New York Suburbs
Posts: 13
Guys, Thanks for helping me out.I did have a wollbly flywheel air intake. I also had a mechanic tell me that the head gasket was shot & the valves were loose. He told me the labor would be around $500. A new 23hp installed would be $1900, so I went for the new motor. Did I do the right thing?
Thanks again, Joe
Reply With Quote
  #9  
Old 05-20-2007, 05:04 PM
barnard barnard is offline
LawnSite Senior Member
 
Join Date: Jul 2002
Location: central,OK
Posts: 618
Yes, You did.
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 09:04 PM.

Page generated in 0.08882 seconds with 7 queries