Register free!

The Green Industry's Resource Center



Reply
 
Thread Tools   Display Modes
  #1  
Old 01-25-2013, 02:03 PM
Chencho Chencho is offline
LawnSite Member
 
Join Date: Oct 2012
Location: Davie,Florida
Posts: 18
Stihl KM 110R Carburetor problems

I have a KM110R that starts up and Idles. Starting can be somewhat rough but after a 4-5 pulls it manages to start. After I get it warmed up and try to use it I have issues...

It doesn't rev up properly. It seems to bog unless I play with the throttle. After I get it up in RPM's it will run at full throttle for a few seconds and then started to bog down and shut off if I hold the throttle down. If i let the throttle go then it doesn't shut off and idles.

What I have done...I tuned the carb to factory settings and nothing. Cleaned the magneto and have brand new spark plug and new filter. I have even played with the tuning with all sorts of combinations and nothing seems to get better. Only worse. Fuel lines are healthy and brand new gas. Only thing I haven't done is take apart the carb or Clean the head of the engine.

Anyone have any recommendations?

Thanks in advanced
Reply With Quote
  #2  
Old 01-25-2013, 06:59 PM
dboyd351 dboyd351 is offline
LawnSite Senior Member
 
Join Date: Sep 2010
Location: Cape Charles, VA
Posts: 909
Clean the spark arrestor screen and exhaust port first, if that doesn't do it, adjust the valves.
Reply With Quote
  #3  
Old 01-25-2013, 09:18 PM
IRRITECH's Avatar
IRRITECH IRRITECH is offline
LawnSite Senior Member
 
Join Date: Dec 2003
Location: ATLANTA, GA
Posts: 931
I have had some success with the stihl decarbonizer. If the unit is older and you have never done this try it. And like dboyd said adjust the valves. Also if you have a bunch of grease and dirt on and around the carb look at the gasket between the insulator and head. I have recently replaced 2 of them one KM110 and an FC90.
__________________
The reigning Mayor of Stupidville
Reply With Quote
  #4  
Old 01-25-2013, 09:52 PM
piston slapper's Avatar
piston slapper piston slapper is offline
LawnSite Platinum Member
 
Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,045
I have about 20 of the 4mix handhelds...they hold up pretty good...
At the first sign of trouble I check the sparkplug...then the valve adjustments...
Those 2 things fix most of the problems...
An easy way to check the isoplate for leaky gaskets ...is to grab ahold of the breather cover while it is running.and try to twist it back and forth...side to side...if the engine speed fluctuates..gasket is leaking..
__________________
If You Have All The Answers...Except The One You Need...You're Not Trying Hard Enough...
Do The Work
Reply With Quote
  #5  
Old 01-25-2013, 10:06 PM
Landrus2's Avatar
Landrus2 Landrus2 is offline
LawnSite Platinum Member
 
Join Date: Dec 2006
Location: Big apple
Posts: 4,694
Quote:
Originally Posted by IRRITECH View Post
I have had some success with the stihl decarbonizer. If the unit is older and you have never done this try it. And like dboyd said adjust the valves. Also if you have a bunch of grease and dirt on and around the carb look at the gasket between the insulator and head. I have recently replaced 2 of them one KM110 and an FC90.
Stihl decarbonizer is that like mechanic in a can
Reply With Quote
  #6  
Old 01-30-2013, 02:02 AM
herler herler is online now
LawnSite Gold Member
 
Join Date: Apr 2012
Posts: 3,856
Adjusting the carburetor takes a lot more experience than twiddling around with the screws, even the most experienced mechanics there is a chance it would be easier to replace it but at the very least try adjusting it proper first:

http://www.ehow.com/how_7207348_adju...arburetor.html
Reply With Quote
  #7  
Old 02-08-2013, 09:44 PM
windflower windflower is offline
LawnSite Senior Member
 
Join Date: Feb 2013
Location: wilmington nc
Posts: 795
I had a similar issue with the same machine. It would idle fine but throttling up became progressively more difficult until it wouldn't at all no matter how long I let it warm up. Exhaust was clean as was the air filter. Carb looked good and engine wouldn't rev up on ether. Replaced the ignition module. Runs fine now.
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 12:35 PM.

Page generated in 0.06237 seconds with 7 queries