Model #917370770 Craftsman walk behind lawnmower, gas

  • Engine/housing/handle
    3 Results
  • Drive Control/gear Case/wheels
    3 Results

Question and Answers

Q:

Why does my Craftsman mower model 917370770 not start with the key?

A:

If there is another battery you can try do that. You could have a worn out battery, a defective starter, key switch, charger.

If you have a volt meter that reads dc volts you can check the output of the battery. It should be 12.6 volts dc. If you connect the charger to the battery and read the voltage it should be 13-17 volts dc.

You might need to take the mower to a shop to get it checked.

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Jimmy K -
Sears Technician
May 14, 2008
Q:

Craftsman Walk Behind Self Propelled Lawn Mower, Model 917370770.

A:

I wish we had a magic button on our lawnmowers. It is very frustrating when the grass is tall and the mower won't start.

You need to decide if the problem is no fuel or no spark.

Remove the spark plug and hold your finger or thumb on the hole the spark plug screws into. Get someone to pull the starter rope or engage the starter and the compression should push your finger off the spark plug hole. This will tell you the valves are operating inside the engine and you have compression.

Pour a thimble full of fuel into the hole the spark plug came out of. Quickly install the spark plug and pull the starter rope or engage the starter. The engine should try to start. This would tell you there is a spark and the engine will run if you get fuel. If the engine doesn't try to start, pour another thimble full of fuel into the cylinder. Look at the anode of the spark plug and see if it is wet. Try to start the engine again. If it still doesn't try to start, remove the spark plug and connect the ignition wire to the spark plug. Hold the bottom of the spark plug to a clean area on the engine block. Use insulated pliers or gloves to hold the spark plug to prevent shock. Get someone to pull the starter rope or engage the starter and see if you get a blue spark from the anode of the spark plug to the base of the plug. If there is no spark the ignition module on the engine is bad.

If you have spark the problem is in the fuel supply. Did you run the engine after draining the fuel to burn the fuel out of the carburetor? If not the carburetor will be clogged with the remnants of the old fuel and need to be replaced. If you ran the fuel out of the carburetor, the diaphragm or float is probably just dry and not flexing. You should take the carburetor apart and clean and soak the diaphragm with fuel or clean the float and needle and seat..

The fuel line might be cracked and letting air into it stopping the fuel from feeding the carburetor.

If you need more advice after trying these things, send another email and include the details of your tests and we will try to help.

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Jimmy K -
Sears Technician
May 17, 2010
Q:

I want to winterize my rotary electric start lawn mower, #917370770: I am confused with the manuals directions regarding the battery:

A:

Thank you for your question.

I am sorry for the confusion. The manual is correct. The battery should be charged for 48 hours with the charger that came with the mower. The charger has an automatic cut off that will turn off when the battery is fully charged. After 48 hours, disconnect the charger. The battery has to be charged for 24 hours before the first use when the mower was new. I have provided you with an image below showing what the battery connector looks like.

All of the other information for storage in the manual is correct. Follow the manual for preparing the mower for storage.

Please reply below if you need further assistance on preparing the mower for storage.

Thank you for using Manage my life.

Mark T..

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Mark T -
Sears Technician
November 03, 2010

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