Model #31H777-0297-E1 BRIGGS & STRATTON Engine

  • Cylinder/crankshaft
    3 Results
  • Cylinder-head/motor-starter
    3 Results
  • Carburetor
    3 Results
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Question and Answers

Q:

compression 31H7770297E1 Briggs&stratton Engine

A:

Thanks for the inquiry and for being a valued member.

I am sorry to hear of the issue you're having getting the engine to turn over. I know how frustrating that is.

It sounds like you need to adjust the valves. According to the Briggs engine model, the intake needs a clearance of .003" - .005" and the exhaust needs a clearance of .005" - .007". I have linked the engine manual below for convenience. YouTube has some great videos you can watch to see how to adjust the valves if you haven't done it before. 

Owner's Manual for Model 31H777-0297-E1

I hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business. 

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Jeff Wallace Sr -
Sears Technician
April 03, 2015
Q:

engine will not turn over 917274400 Craftsman Lawn tractor

A:

Thanks for the inquiry and for being a valued member.

I am sorry to hear of the issues you're having with the tractor. I know how frustrating that is. 

It sounds like you may need to adjust the valves on the engine. Briggs & Stratton engines will need valve adjustments from time to time. Based upon the engine model of 31H777-0297-E1, the intake valve should be set between .003"-.005" and the exhaust valve should be set to .005"-.007". There are some great YouTube videos that you can watch to see the process of adjusting the valves. You will need some feeler gauges to set the clearance properly. 

In regards to the freewheel control, you will need to check the connection of the rod to the transaxle and make sure it’s connected. If it is connected, there could be debris or something causing the rod to bind and not engage/disengage. If that checks out, the brakes could be sticking. That would require checking the brake rod to the transaxle. There could be something binding there, or the brakes may need adjustment. There is a bolt to the bracket on the transaxle that can be loosened to adjust the brakes some. YouTube has some great videos on this as well.

I hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business.   

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Jeff Wallace Sr -
Sears Technician
March 23, 2015
Q:

Engine Tourque Specs

A:

Managemylife.com is always a great resource to find the answers to just about anything. Your expert will research your question and respond within two business days but usually sooner.

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Alina F. -
November 22, 2011
A:

You can CLICK HERE to see the spec chart for Briggs and Stratton engines. Your engine falls into the 310000 category.

If you have any further questions please let me know.

Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
November 25, 2011
A:

I also need pictures and instructions to hook up carbburater and throttle control to the side of engine

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Corey -
November 26, 2011
A:

I have attached a photo of the carburetor and linkage so you can see how they connect. The throttle cable end will push into the white nylon piece on the control. Then move the throttle up as far as it will go. Pull the cable back (in direction of the back of the tractor) as far as it will go and then tighten the clamp for the cable.

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XX Wade_ -
Sears Technician
November 26, 2011
A:

Hi Wade, On engine we have been discussing I have one Steel and one Aluminum push rod, which goes where? Exhaust and intake?

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Corey -
November 29, 2011
A:

Aluminum on the intake and steel on the exhaust.

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XX Wade_ -
Sears Technician
November 29, 2011
A:

Hopefully the last question, for the engine we have been dealing with do you have a diagram with how the wire is run of the stator and down by starter and also i have a two prong black and grey wire plug, where does that run and plug into?

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Corey -
December 02, 2011
A:

Also how does throttle cable hook to engine govenor on side of block (i believe the spring goes straight down to linkage?? Your info has been very helpful!!!

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Corey -
December 02, 2011
A:

No diagram for that wire. It just kind of comes down that side. Just make sure it's not pinched or where it can get caught up in the starter or flywheel. the other plug is for the fuel shutoff solenoid. There should be a piece (a little pigtail) of harness that it will plug into that goes to the tractor harness at the 6 pin plug there. I don't have any photos of that situation though. On the side of the engine for the throttle. The cable will connect to the little white nylon block (has hole in center) on the engine control. From the governor arm there should be a linkage and a very thin spring. If you look at my previous drawing, where you see the coils of that thin spring, all the way at the bottom of the drawing is that little square piece where the throttle cable connects. You push the end into the hole and then there is a little screw-clamp back to the right that holds the cable in place.

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XX Wade_ -
Sears Technician
December 05, 2011
A:

My engine is starting to smoke badly and I want to overhaul it. Is an overhaul kit offered by Sears or Briggs??? (rings, gaskets and seals) Does it include a manual with torque specs? Your Nov. 25, 2011 post is no longer available with torque specs. (XX Wade)

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Jack -
March 02, 2015
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