Register free!

The Green Industry's Resource Center


Reply
 
Thread Tools   Display Modes
  #1  
Old 09-11-2007, 10:48 PM
Louisianagames Louisianagames is offline
LawnSite Member
 
Join Date: Sep 2007
Location: Mississippi
Posts: 16
Smoking Kohler 20hp mag

Hello,
I bought an older Wizard with a 20 hp kohler Magnium engine today.
After getting rid of the bad gas it fires right up.
But it smokes pretty good. I pulled the primary and secondary air filters off and ran it (still smoked) put My hand on the crank vent tube it puffs air.
Any idea what would make it smoke?
Head gasket or rings.
Any help mutch appreciated.
Louisianagames
Reply With Quote
  #2  
Old 09-11-2007, 11:13 PM
lifetree's Avatar
lifetree lifetree is offline
LawnSite Fanatic
 
Join Date: Oct 2006
Location: Chattanooga, TN
Posts: 5,365
Quote:
Originally Posted by Louisianagames View Post
Any idea what would make it smoke? Head gasket or rings.
Maybe both !!
__________________
2007 Dixon RAM MAG 50" ZTR
2006 Dixon RAM MAG 50" ZTR
2005 Gravely 34" ZTR
2010 LESCO 48" Stand-On
2008 LESCO 36" Hydro WB
2008 Quick 36" Samurai Dually WB
Reply With Quote
  #3  
Old 09-11-2007, 11:14 PM
dutch1's Avatar
dutch1 dutch1 is online now
LawnSite Silver Member
 
Join Date: Dec 2004
Location: Jayhawk
Posts: 2,195
Did you check the oil level? If the engine has been sitting a while it may have a crankcase overfilled with a mixture of gas and oil, particularly if is a gravity flow fuel system(without a fuel pump). If that's not the case, check the compression and do a leak down test. Just a couple of quick thoughts.

Dutch
Reply With Quote
  #4  
Old 09-11-2007, 11:27 PM
Louisianagames Louisianagames is offline
LawnSite Member
 
Join Date: Sep 2007
Location: Mississippi
Posts: 16
Thanks Guys,
Oil level is dead on the money. Does smell a little like fuel.
The gas tank is under the seat kinda like My old John Deere.
I'll take a peek in a minute and see if it has a pump and test the compression.
Was'nt a bad deal...couldnt resist $60.00 even if I have to go thru it.
Nice place Ya got here!
La.
Reply With Quote
  #5  
Old 09-12-2007, 01:01 AM
Louisianagames Louisianagames is offline
LawnSite Member
 
Join Date: Sep 2007
Location: Mississippi
Posts: 16
Ok here goes..
Checked compression 100 lbs on both sides.
1 cylnder I noticed as I shined the flash light in it looks like gas and oil on the cylinder wall (bottom) spark plug is caked up inside the ceramic/cathode.
And it looks like oil is leaking down from under the valve.

Where to start?
Pop the head off?
To add to it it does have a fuel pump with four phillip screw holding it to the block..Its about 2 x 2 inches

Thanks a million!
La.
Reply With Quote
  #6  
Old 09-12-2007, 09:44 AM
Louisianagames Louisianagames is offline
LawnSite Member
 
Join Date: Sep 2007
Location: Mississippi
Posts: 16
Another question or 2 before I get started.
How does the valve stem guides come out?
Do You have to pull the engine?
Reply With Quote
  #7  
Old 09-12-2007, 03:23 PM
Eric D's Avatar
Eric D Eric D is offline
LawnSite Senior Member
 
Join Date: May 2007
Location: Howell, MI
Posts: 294
Hold on a minute before taking it apart!

Quote:
Originally Posted by Louisianagames View Post
Another question or 2 before I get started.
How does the valve stem guides come out?
Do You have to pull the engine?
Louisianagames,

Welcome to the lawnsite.com. Before you start taking the engine apart run it for at least a few tanks of gas. If this unit had sat for sometime the cylinder walls and valve stems could have developed rust. It may take some running for this to clean up. You might just fine that with a little bit of run time all or most of the smoke clears up.

Regards,

Eric D
Reply With Quote
  #8  
Old 09-12-2007, 04:23 PM
Louisianagames Louisianagames is offline
LawnSite Member
 
Join Date: Sep 2007
Location: Mississippi
Posts: 16
Well I changed the oil and let it run 1/2 hr. It smokes pretty good..If I rev it up small hesitation (normal) then smoke factory goes to work....
Might run it when the skeeter's come out

Got the manual thanks for the link and help.

Is the valve guides hard to change,,meaning do I have to remove the engine?
If so I'll rebuild it.
Its a m20 QS Horizontal shaft engine

Thanks guys!
Reply With Quote
  #9  
Old 09-13-2007, 07:29 AM
Eric D's Avatar
Eric D Eric D is offline
LawnSite Senior Member
 
Join Date: May 2007
Location: Howell, MI
Posts: 294
Louisianagames,

First off, Bill Kapaun has given you all you should need to trouble shoot the issues. Putting the in to a reply back to Bill after helping you is taken as an insult, at least to me it is. Nontheless, I'll try to give you a little more advise and see what you do with it.

First and far most you should apologize to Bill.

You seem to be focused on valve guides, why? From the information you have left in previous postings I believe you are barking up the wrong tree.

More then likely the primary path for oil getting into the combustion chamber is passed the piston rings. You mentioned that the compression was 100 psi. What type of compression test did you run? Was it a motoring test or differential? If it was a motoring test, 100 psi is low. You also mentioned that you could feel air out the breather. Was this with the engine running or motoring or when you did the compression test? Air out the breather vent normally indicates leakage past the piston rings. Bottom line, from way out here in web world, best guess would be worn piston rings.

Your options,
  1. do nothing and use the mower with the smoke
  2. replace the piston rings and hone the cylinder walls (this is assuming the piston and cylinder are ok)
  3. add heaver grade engine oil (40 or 50).

Best of luck,

Eric D
Reply With Quote
  #10  
Old 09-13-2007, 12:21 PM
Louisianagames Louisianagames is offline
LawnSite Member
 
Join Date: Sep 2007
Location: Mississippi
Posts: 16
Bill accept My appologies as not intended as a flame just a correction and a little smiley guy saying no.

Eric D thanks for the push in the directiion of the rings.
The only reason I'm so curious of the valve guide, is that I can look in and see the valve is gummed up with oil. I was trying to prepair Myself with what steps to get the guides to the correct facillity and have them replaced, or can I do iy Myself.

I'll pull it down and inspect it. If I get confused, I'll post a picture and hope I'll stay on the right track to getting the smoke out My eyes..

Thanks guys,
You Rock!
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 12:40 PM.

Page generated in 0.11041 seconds with 7 queries