Cv16s Kohler dies after 3o minutes - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
Small Engines and Repair

Midwest Mower Pro

 
LinkBack Thread Tools Display Modes
post #1 of 11 Old 07-23-2018, 09:48 PM Thread Starter
MTF Junior Poster
 
Join Date: Jul 2018
Posts: 3
Cv16s Kohler dies after 3o minutes

I’ve replaced all of the fuel lines, shut off, fuel filter, fuel pump, spark plug, air filter, gas cap. It starts and runs great for about 30 minutes then tries to die. I have to put the choke on to keep it running. After sitting in choke for a few minutes I can take it off and it will run great again for a couple minutes then tries to die again. It’s the same process over and over. I also rerouted the fuel line to avoid vapor lock. I know it still gets spark because it continues to run with the choke on. Does anyone know what the problem could be? Could it be the carburetor? I removed the fuel solenoid as well and bypassed it. Any help would be appreciated.
Carigdon is offline  
Sponsored Links
Advertisement
 
post #2 of 11 Old 07-24-2018, 01:23 AM
Martian Wx Moderator
 
Mark / Ohio's Avatar
 
Join Date: Mar 2005
Location: Central Ohio USA
Posts: 11,543
Barn
Re: Cv16s Kohler dies after 3o minutes

Welcome to the forum!

Mark -2002 John Deere LT150H
Mark / Ohio is offline  
post #3 of 11 Old 07-24-2018, 11:14 PM Thread Starter
MTF Junior Poster
 
Join Date: Jul 2018
Posts: 3
I’ve replaced all of the fuel lines, shut off, fuel filter, fuel pump, spark plug, air filter, gas cap. It starts and runs great for about 30 minutes then tries to die. I have to put the choke on to keep it running. After sitting in choke for a few minutes I can take it off and it will run great again for a couple minutes then tries to die again. It’s the same process over and over. I also rerouted the fuel line to avoid vapor lock. I know it still gets spark because it continues to run with the choke on. Does anyone know what the problem could be? Could it be the carburetor? I removed the fuel solenoid as well and bypassed it. Any help would be appreciated.
Carigdon is offline  
Sponsored Links
Advertisement
 
post #4 of 11 Old 07-25-2018, 01:06 AM
Martian Wx Moderator
 
Mark / Ohio's Avatar
 
Join Date: Mar 2005
Location: Central Ohio USA
Posts: 11,543
Barn
Re: Cv16s Kohler dies after 3o minutes

I moved this to small engines to see if anyone had any ideas.

Mark -2002 John Deere LT150H
Mark / Ohio is offline  
post #5 of 11 Old 07-25-2018, 02:18 AM
Slightly Autistic
 
Bill Kapaun's Avatar
 
Join Date: Jun 2007
Location: Orygun
Posts: 7,181
Re: Cv16s Kohler dies after 3o minutes

Quote:
Originally Posted by Carigdon View Post
Iíve replaced all of the fuel lines, shut off, fuel filter, fuel pump, spark plug, air filter, gas cap. It starts and runs great for about 30 minutes then tries to die. I have to put the choke on to keep it running. After sitting in choke for a few minutes I can take it off and it will run great again for a couple minutes then tries to die again. Itís the same process over and over. I also rerouted the fuel line to avoid vapor lock. I know it still gets spark because it continues to run with the choke on. Does anyone know what the problem could be? Could it be the carburetor? I removed the fuel solenoid as well and bypassed it. Any help would be appreciated.
When you apply choke, you restrict the amount of air entering the engine, which lowers the effective compression.
A spark plug might fire under those conditions and not with the choke off.
Get one of those cheap inline spark testers and install it.
Compare spark when first running and again when it starts showing the problem.

You may have a heat sensitive ignition coil/module.

Illegally Blind

Bill Kapaun is online now  
post #6 of 11 Old 07-25-2018, 10:45 AM
3K Poster!!!!
 
Join Date: Nov 2009
Location: georgia's toe-nails of the foot hills
Posts: 4,681
Re: Cv16s Kohler dies after 3o minutes

Do you have a fuel line(metal) routed above the cylinder inside the fan shroud/flywheel cover? A fuel pump? If you do, you may be running into vapor lock. The most wondrous fuel blends currently available seem to have low boiling points, or high vapor pressure, your choice. Kohler routed the metal fuel line through the shroud from the pump on the cam side to the carburetor on the opposite side. If you have a machine with a hood, it may be directing the expelled air from under the cylinder, warmed as it cools the cylinder & head, such that it gets fed back into the blower on the flywheel. The result is hotter than ambient air being used to cool the engine. See also: 'turbocool' ducting on some models.
I have found, and noted repeatedly, that if I remove the hood, run the engine for a few minutes, it will start to run properly as the fuel line cools and the hot fuel is replaced by cooler fuel. It does not die, but it is not running properly and smoothly, if I use it with the hood on during hot weather.
If you remove the hood and allow cooler air to the blower wheel, you may find you no longer have a problem.
Anecdote story over. Apparently I am the only one to have this circumstance. CV15S Craftsman 917.256580. New pump, new coil, new fuel filter.
tom

simplificate & add lightness

It's not how hard you work, it's how much you get done.
tomw0 is offline  
post #7 of 11 Old 07-25-2018, 11:21 AM Thread Starter
MTF Junior Poster
 
Join Date: Jul 2018
Posts: 3
Re: Cv16s Kohler dies after 3o minutes

I removed the metal line and ran a new hose behind the motor to avoid vapor locking. I also put a new fuel pump on, but it keeps wanting to die after about 30 minutes.
Carigdon is offline  
post #8 of 11 Old 07-26-2018, 09:10 AM
3K Poster!!!!
 
Join Date: Nov 2009
Location: georgia's toe-nails of the foot hills
Posts: 4,681
Re: Cv16s Kohler dies after 3o minutes

Perhaps some 'stuff' that's swishing around in the bottom of the fuel tank. It may finally get sucked to the outlet, form a semi-***, and restrict the flow?
The reported problem surely resembles lack of fuel, to me. Try a separate tank? Use a tiny-cam to view the inside?
tom

simplificate & add lightness

It's not how hard you work, it's how much you get done.
tomw0 is offline  
post #9 of 11 Old 11-27-2018, 07:46 PM
Not so junior poster
 
Hipster's Avatar
 
Join Date: Jan 2011
Location: Bloomington, MN
Posts: 253
I had the same issue, tried all that you have done. ALL Fuel lines, fuel pump, Chinese carb, spark plug.
Coil was the last part to replace.....and now it runs great. No dying, misfiring and I am happy.

1999 Broadmoor, 38" mower deck
36" snow blower (primary snow removal machine)
Cab added for comfort
Duke the dog did not care for the April 2018 snow storm in Bloomington.
Hipster is offline  
post #10 of 11 Old 12-01-2018, 03:31 AM
2000 Posts and climbing!!!
 
Cannon51's Avatar
 
Join Date: Mar 2009
Location: GA
Posts: 2,373
Re: Cv16s Kohler dies after 3o minutes

I replaced the coil on a CV14 this week with one I got on Amazon for $15.99. Does your CV16 have the Smart Spark box?
Cannon
Cannon51 is online now  
post #11 of 11 Old 12-01-2018, 10:43 AM
Not so junior poster
 
Hipster's Avatar
 
Join Date: Jan 2011
Location: Bloomington, MN
Posts: 253
Yes it does, I am glad the coil fixed it FINALLY!
Was very frustrating when it would work for 2 mornings then die after 1/3 of the way through the next time.

1999 Broadmoor, 38" mower deck
36" snow blower (primary snow removal machine)
Cab added for comfort
Duke the dog did not care for the April 2018 snow storm in Bloomington.
Hipster is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome