Model #31A607-0741-B1 BRIGGS & STRATTON Engine

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Question and Answers

Q:

torque on flywheel nut

A:

Its great to know you are working on a project on your own. While you are waiting for your expert answer, I did some research on the mower. At this time, I was unable to locate information that would be helpful in regards to your question. Your expert will answer within 24 to 48 hours with detailed information. Thank you for using Manage My Life.

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Joseph P. -
November 24, 2011
A:

The flywheel nut should be torqued down to 100 foot pounds.

You should not have to remove the flywheel screw/nut to change the fan out. Remove the screen (and engine shroud on some models) then remove the 2 screws that hold the fan onto the flywheel. The fan will lift straight off. Then set the new fan in place and bolt it down.

Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
November 28, 2011
A:

Wade, For future reference, and there may be another system that I do not have, but for my model engine, the flywheel nut does hold the screen down on the flywheel. It must be removed to access the fan. The two smaller nuts on the flywheel only 'locate' the fan in reference to the flywheel and magnetic pickup, and they do not need to be removed. In with the fan that I ordered was a new screen, plastic cap for the screen, and those two screws. I had to drill out four-1/2" dia. holes in the fan, which were clearly dimpled, and then reassemble. I now have an extra screen, cap, and screws sitting on the work bench. Thanks for your help with the torque requirement

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Ron -
December 01, 2011
A:

Thanks for the information. I've not run across a Briggs engine where the flywheel nut/screw has to come off for the fan in many years. All the drawings I have for your engine show it to where the fan comes off without having to do all that. I'll have to see if I can get some updated drawings/photos or go by the store and see if I can find one like that and take some photos of it myself.

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XX Wade_ -
Sears Technician
December 02, 2011
A:

i need to know what the lap is on the valves

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frank -
April 25, 2013
A:

Frank, I posted an image below that has the instructions for adjusting the valves. Just click on the image to enlarge it. I hope this is helpful. Please let me know if you need further assistance. Thank you for using Manage my life. Mark

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Mark T -
Sears Technician
April 26, 2013
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