Model #143976606 Craftsman engine

  • Engine 143.976606 (71/143)
    3 Results
  • Starter 590739 Div 71/143
    3 Results
  • Carburetor 632671a (71/143)
    3 Results
  • Rewind Starter
    3 Results

Question and Answers

Q:

Craftsman mower w/ Tecumseh #143976606 engine wouldn't start.

A:

I am sorry to hear your mower is giving you problems. Please use the following information to help get this issue resolved.

 

Make sure to use fuel that is less than 5 weeks old. Gas will start to break down and become less volatile.  If the gas is old, drain the tank refill with fresh fuel.

 

Check the air filter and replace it if is not dry or clean.

 

If the engine does not start, you need to determine what is causing the problem. The engine need three things to start and they are fuel compression and spark. Use the following instructions to determine what is missing.

 

The first check is going to be if the engine is getting spark. Remove the spark plug from the engine and connect it to the spark plug wire. Use a pair of insulated pliers to the base of the spark plug against a metal part of the engine. Now have someone pull the starter rope. When the engine is turning over you should see the spark plug spark. If the plug does not spark, disconnect the spark plug and insert a screwdriver into the boot of the spark plug wire. _Make sure to hold onto the handle of the screwdriver._ Hold the metal portion of the screwdriver close to a bare metal part of the engine. Now pull the starter rope again with the starter. If you see a spark, you need to replace the spark plug. If you do not see, a spark most likely the ignition coil is defective.

 

Once you have determined the engine has spark you have to check for fuel. The easiest way to check for a fuel problem is to remove the air filter and pour a teaspoon of fuel mix into the throat of the carburetor.  Then try to start the engine. If the engine acts as if it wants to start or runs for a short time and stalls the problem with the engine is a fuel issue. Most likely, the carburetor does have some build up from old gas. You can watch THIS VIDEO  to use as a reference for cleaning your carburetor.

 

 

 

If the engine did not attempt to start with pouring the gas in the carburetor, I recommend checking the compression of the engine. To check the compression, remove the spark plug and tuck the wire out of the way. Hold your finger over the spark plug hole and have a helper pull the starter rope. When the engine turns over the compression should force air past your finger. If the engine does not force air out past your finger, there is an internal engine problem. A blown head gasket could cause this. Just remove the head and inspect the gasket. You should see where it was leaking. I would also take the time to look at the cylinder walls. If they are deeply scored, the engine is probably loosing compression. This will result in low performance and burning oil.

 

If you need further assistance, please reply below with more details.

 

 

 

If you do not feel confident repairing this problem yourself, then you can have it repaired by a Sears  technician.  Here is a link that will provide the nearest drop-off locations:  Sears Home Services.

 

 

 

Thank you for using Manage my life.

 

Mark T.

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Mark T -
Sears Technician
October 07, 2013
A:

Cary, The head bolts should be torqued to 200 inch pounds. I posted an image below that shows the sequence to tighten them. Click on the image to enlarge it. Thank you for using Manage my life. Mark T.

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Mark T -
Sears Technician
October 23, 2013
A:

At, I am sorry you are having problems with your mower. If you need a particular part for the mower, please let me know which one. I will be happy to search for the part. I hope to hear from you. Thanks, Mark

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Mark T -
Sears Technician
November 02, 2013
A:

I searched for the right hand bracket but did not have any luck finding one. If the bracket you have is not completely ruined you may be able to have it repaired. If it is cracked, I recommend taking it off and find a local welding shop. They should be able to weld the bracket and add some support if needed. Thank you for using Manage my life. Mark

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Mark T -
Sears Technician
November 11, 2013
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