Starving ?? - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 19 Old 08-21-2019, 01:03 PM Thread Starter
MTF Junior Poster
 
Join Date: Oct 2018
Posts: 13
Starving ??

I have a craftsman with the Kohler motor and it will run strong for about a half an hour while I’m mowing and then all of a sudden it drops in power and doesn’t keep the revs up
It occasionally with kick back in for a min but then drops back down
Does anyone know what this could be??
I cleaned tre air filter and the gas filter was replaced a couple years ago
Midnightmadman29 is offline  
Sponsored Links
Advertisement
 
post #2 of 19 Old 08-21-2019, 01:47 PM
Senior MTF Member
 
Caustic's Avatar
 
Join Date: May 2015
Location: Delusion
Posts: 164
Barn
Re: Starving ??

Sounds like your timing may have slipped. Do you notice that the engine is hotter than it should be?

--------------------------------------------------------------
Unintended Craftsman Collector it seems!
*** Ride On ***
Craftsman 644.605120 .... Some crazy Canadian 12 HP machine rescued from a flood once-upon-a-time in the Yukon!
** Chain Saw **
C944.419460 Special Edition (Husquvarna Anti-Vibration Handle?) - Non-working
358.360680 - Given to a friend that needed a saw
*** Walk Behind Tractor ***
Simplicity W 7.25 HP 1961
Simplicity VC 7 HP 1959
Simplicity V 5 HP 1953/54
*** Compact Tractor ***
Mitsubishi MT1601D 1982/1983
Caustic is offline  
post #3 of 19 Old 08-21-2019, 03:01 PM Thread Starter
MTF Junior Poster
 
Join Date: Oct 2018
Posts: 13
Hard to say but I really didn’t notice it being too hot
Midnightmadman29 is offline  
Sponsored Links
Advertisement
 
post #4 of 19 Old 08-21-2019, 03:50 PM
Proud Member of the 1K Club
 
Join Date: Aug 2016
Location: Northern Florida (Almost Alabama)
Posts: 1,144
Re: Starving ??

Sounds like a fuel delivery problem. Remove gas cap and use either a compressor or a can of air to clear the tiny hole in the center of the cap and diaphragm under that. Take a look inside the tank to see if there is anything that could obstruct the flow. Gas filters should be replaced at least yearly, or sooner depending on the gas used, especially if you use ethanol gas. Take the hose off after the fuel pump and ensure you are getting a flow of gas when cranking.
Flaken is online now  
post #5 of 19 Old 08-21-2019, 06:42 PM
2000 Posts and climbing!!!
 
Cannon51's Avatar
 
Join Date: Mar 2009
Location: GA
Posts: 2,368
Re: Starving ??

I've had 3 or 4 kohler CV singles do that and it has turned out to be the coil most of the time. The best way I've found to check them is with a cheapo HF inline spark tester. One of mine would quit after a round or two of mowing then crank back after a few minutes, I was sure it was fuel related but when I put the tester on it after it died there was no spark.
Cannon
Cannon51 is online now  
post #6 of 19 Old 08-21-2019, 07:01 PM
Proud Member of the 1K Club
 
Join Date: Aug 2016
Location: Northern Florida (Almost Alabama)
Posts: 1,144
Re: Starving ??

Quote:
Originally Posted by Cannon51 View Post
I've had 3 or 4 kohler CV singles do that and it has turned out to be the coil most of the time. The best way I've found to check them is with a cheapo HF inline spark tester. One of mine would quit after a round or two of mowing then crank back after a few minutes, I was sure it was fuel related but when I put the tester on it after it died there was no spark.
Cannon
Absolutely! But it is still a good idea to check the gas flow if that hasn't already been done. The fuel filter that was several years old bothered me.
Flaken is online now  
post #7 of 19 Old 08-21-2019, 07:15 PM
Senior MTF Member
 
Caustic's Avatar
 
Join Date: May 2015
Location: Delusion
Posts: 164
Barn
Re: Starving ??

Coil issues would definitely affect timing and do behave erratically when hot.

If it were a fuel issue, it would cause the same type of problem whether cold or hot.

--------------------------------------------------------------
Unintended Craftsman Collector it seems!
*** Ride On ***
Craftsman 644.605120 .... Some crazy Canadian 12 HP machine rescued from a flood once-upon-a-time in the Yukon!
** Chain Saw **
C944.419460 Special Edition (Husquvarna Anti-Vibration Handle?) - Non-working
358.360680 - Given to a friend that needed a saw
*** Walk Behind Tractor ***
Simplicity W 7.25 HP 1961
Simplicity VC 7 HP 1959
Simplicity V 5 HP 1953/54
*** Compact Tractor ***
Mitsubishi MT1601D 1982/1983
Caustic is offline  
post #8 of 19 Old 08-21-2019, 07:22 PM Thread Starter
MTF Junior Poster
 
Join Date: Oct 2018
Posts: 13
Thanks I’ll start by checking the gas cap and the fuel line
Midnightmadman29 is offline  
post #9 of 19 Old 08-21-2019, 07:23 PM
Proud Member of the 1K Club
 
Join Date: Aug 2016
Location: Northern Florida (Almost Alabama)
Posts: 1,144
Re: Starving ??

Quote:
Originally Posted by Caustic View Post
Coil issues would definitely affect timing and do behave erratically when hot.

If it were a fuel issue, it would cause the same type of problem whether cold or hot.
One often overlooked item with fuel is something partially blocking the fuel outlet. The motion of mowing may cause that something in the tank to partially cover the outlet. When the tractor is turned off and still, the obstruction moves away. Ensure that you have fuel flowing, then move on to other causes.
Flaken is online now  
post #10 of 19 Old 08-21-2019, 07:54 PM Thread Starter
MTF Junior Poster
 
Join Date: Oct 2018
Posts: 13
To try and describe it sound and feels like someone is pulling the throttle down about 3/4 and stays like that and occasionally it will kick in to full for a second and then drop down
Midnightmadman29 is offline  
post #11 of 19 Old 08-21-2019, 08:07 PM Thread Starter
MTF Junior Poster
 
Join Date: Oct 2018
Posts: 13
What would be blocking the fuel outlet??
Midnightmadman29 is offline  
post #12 of 19 Old 08-21-2019, 08:08 PM
5000 Strong & Climbing
 
Join Date: Nov 2010
Location: Buford, Ga
Posts: 6,258
Re: Starving ??

If this is a gravity feed fuel system definitely check for fuel flow. I had one that worked fine for weeks and then one evening quit while coming up the drive. Plenty of gas in the tank and nothing could be seen in the tank but when I pulled the fuel line NO GAS !! When they drilled the hole in the hose barb on the bottom of the tank a swirl of plastic was left in the hole and some tiny bits of crud finally stopped up the hole. I took the correct sized drill bit turned by hand and cleaned out the swarf.
rayjay is online now  
post #13 of 19 Old 08-21-2019, 08:25 PM
Senior MTF Member
 
Caustic's Avatar
 
Join Date: May 2015
Location: Delusion
Posts: 164
Barn
Re: Starving ??

Quote:
Originally Posted by rayjay View Post
If this is a gravity feed fuel system definitely check for fuel flow. I had one that worked fine for weeks and then one evening quit while coming up the drive. Plenty of gas in the tank and nothing could be seen in the tank but when I pulled the fuel line NO GAS !! When they drilled the hole in the hose barb on the bottom of the tank a swirl of plastic was left in the hole and some tiny bits of crud finally stopped up the hole. I took the correct sized drill bit turned by hand and cleaned out the swarf.
Sounds like you need a better fuel filter to inspect flow through. I generally use these two types for that reason, even if there is an in tank filter.

--------------------------------------------------------------
Unintended Craftsman Collector it seems!
*** Ride On ***
Craftsman 644.605120 .... Some crazy Canadian 12 HP machine rescued from a flood once-upon-a-time in the Yukon!
** Chain Saw **
C944.419460 Special Edition (Husquvarna Anti-Vibration Handle?) - Non-working
358.360680 - Given to a friend that needed a saw
*** Walk Behind Tractor ***
Simplicity W 7.25 HP 1961
Simplicity VC 7 HP 1959
Simplicity V 5 HP 1953/54
*** Compact Tractor ***
Mitsubishi MT1601D 1982/1983
Caustic is offline  
post #14 of 19 Old 08-22-2019, 08:08 PM Thread Starter
MTF Junior Poster
 
Join Date: Oct 2018
Posts: 13
Update
So there’s a couple thing I forgot until I used it today
First thing is as soon as it kicks down there is a serious smell of fumes like it’s running super rich
I ran out of gas tonight and when I filled it back up it ran perfect 100% for about 20 minutes until I had to come in from lightening
Up until it ran out of gas and I refilled it about half a tank it was running terrible for about an hour.
Maybe these details will help a bit
I did try cleaning the gas cap earlier too but no change from that
Midnightmadman29 is offline  
post #15 of 19 Old 08-22-2019, 11:16 PM
Senior MTF Member
 
Caustic's Avatar
 
Join Date: May 2015
Location: Delusion
Posts: 164
Barn
Re: Starving ??

Advance(spark), fuel, air.

You need to think about what is happening. Your fuel is a constant (assuming you checked the filter), that leaves your air filter getting clogged or your timing changing.

Look at your air filter and measure your coil, after that you need to pull your flywheel and inspect your key for cracks.

--------------------------------------------------------------
Unintended Craftsman Collector it seems!
*** Ride On ***
Craftsman 644.605120 .... Some crazy Canadian 12 HP machine rescued from a flood once-upon-a-time in the Yukon!
** Chain Saw **
C944.419460 Special Edition (Husquvarna Anti-Vibration Handle?) - Non-working
358.360680 - Given to a friend that needed a saw
*** Walk Behind Tractor ***
Simplicity W 7.25 HP 1961
Simplicity VC 7 HP 1959
Simplicity V 5 HP 1953/54
*** Compact Tractor ***
Mitsubishi MT1601D 1982/1983
Caustic 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)
 



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