Model #917377890 CRAFTSMAN Walk Behind Lawnmower, Gas

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Question and Answers

Q:

mower wont start 917377890 Craftsman Rotary mower

A:

Thank You for choosing Sears PartsDirect.com and being a valued member. It is unfortunate to hear that you are having issues with your mower and I do understand your frustration. Glad to help out. I'm looking at your model number 917377890 and I recommend checking the engine for spark first. To check for spark remove the spark plug. Then connect the spark plug to the spark plug wire. Now you will need to hold the base of the spark plug to a clean metal surface with insulated pliers. Once you have the spark plug in position have a helper turn the engine over. You should see a blue spark from the spark plug. If you do not have spark, remove the kill wire from the module. Then check for spark again. If there is no spark, the module is defective. It can also be an issue with the fuel or the compression. The first thing I would do is remove the fuel filter and pour a few teaspoons for fuel into the throat of the carburetor. Then try to start the engine. If the engine starts and stalls the problem is in the fuel supply or carburetor. Usually the carburetor needs to be cleaned because it has been sitting. Once the carburetor is cleaned, fill the tank with fresh fuel and check the operation. If the engine does not try to start with pouring gas into the carburetor the problem could be with compression. To check the compression you need to remove the spark plug. Then tuck the spark plug wire out of the way. Put your finger over the spark plug hole to seal it. Then have a helper turn the key for you. When the engine turns, the compression should blow past your finger. If it does not the engine has an internal problem. I trust this information will help you.

 

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Sherman_G_Wallace -
Sears Technician
September 25, 2014
A:

ok, lawnmower fixed. when i pulled the plug to check for compression there was none! Pulled the valve cover and both valves were basically frozen. with a little work the intake freed up to where i could move it with my thumb, the exhaust was another ordeal. but, after an hour of work it finally freed up. you could see the corrosion on the valve stem. adjusted the valves, governor, magnet pickup, installed new plug with correct gap, re installed new carb with original honda gaskets, went to change the oil, and none came out. so, installed oil a little at a time while I rotated the motor several times with the plug disconnected. when i was happy with the level I re connected the plug and it started right up. i am fixing this for a friend, i am going to recommend he change the oil and maybe run some sea foam thru it after a few mows. otherwise, I mowed my lawn with no issues! stopped and started the mower several times. the dirve made a few noises the first few times i engaged it however that went away after a while. if i can get my friend to do annual maintenance on this mower it should last a long long time. thanks for your help!

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matthew -
October 05, 2014
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Q:

I HAVE A CRAFTSMAN MOWER 917.377890 AND NEED A DIAGRAM OF HOW TO INSTALL RETURN SPRING ITEM # 48 PART # 182226 THAT IS PART OF THE BELT IDLER AND PULLEY SYSTEM

A:

I can't find a drawing or photo of where this spring goes anywhere. It should connect onto the idler pulley bracket and then stretch back towards the engine and there will be a hole in the mower deck for the other end of the spring to connect into.

I'll keep looking to see if I can find any photos of this and if I do, I'll post those here.

Thank you for using Manage My Life!

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Wade_B -
Sears Technician
October 14, 2013
Q:

valve lash on my lawn mower

A:

I know how important it is to have as much useful information about your Mower as possible.While you wait for the expert to review your model, you can check a similar questions from previous expert post if you like,I attached the links below. Hope this helps!

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Priscilla V -
February 02, 2012
A:

Thank you for your question.

I will be happy to assist you with adjusting the valve lash. I have posted an image below that shows how to adjust the valves. Click on the image to enlarge the image.

Please feel free to reply below if you need further assistance.

Thank you for using Manage my life.

Mark T.

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Mark T -
Sears Technician
February 03, 2012
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