Question about Poulan 42-Inch Steel Deck 17.5 HP Briggs & Stratton I/C Engine With 6 Speed

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I have a Briggs and Stratton MTD. Part Number: 13AN771G529 The tractor will start and drives well in either forward or reverse position, but when you engage the deck, the track does not propel forward but stays still as if in neutral. I would have to put the tractor in neutral and then in the forward position before the blade engages. This occurs almost every time I disengage the blade and reengage the deck. The unit is also occasionally backfire if I put it in reverse and the deck is engaged. At this point the engine will cut out and then I hear the backfire.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

kevin000
  • 1847 Answers

SOURCE: Briggs and Stratton 17HP Intek Governer Overspeeds

Can you Regulate the Engine Speed Using the Governor Arm? If Yes, then Reset the Governor. **To Reset the Governor; Loosen the Governor Arm Bolt and Turn the Governor Shaft Clockwise Until it Stops. Using the Governor Arm Hold the Carburetor to Full Throttle. Now with the Shaft Full Clockwise and the Governor Arm and Carburetor Held at Full Throttle, Tighten the Governor Arm Bolt. If the Engine Still Runs Full Throttle, then Reverse the Rotation of the Governor Shaft, but Still Hold the Carburetor at Full Throttle with the Governor Arm. If it Still Runs at Full Throttle, then Check the Internal Governor.** If you Can Not Regulate the Engine Speed Using the Governor Control Arm, then Check the Carburetor Throttle Valve. If the Throttle Control Valve (sometimes called a Flap or Plate) Mounting Screws Came Out of the Control Valve, then you will have No Control Over the Engine Speed. Send me the Model and Type or Spec Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you. **The Throttle Cable Attaches to the Throttle Control Bracket. The Cable Moves a Slide that Moves a Pivot. The Pivot has the Spring Attached to it and to the Governor Arm. The Solid Link Connects to the Governor Arm and goes to the Throttle Shaft on the Carburetor. When the Throttle Cable is Moved it Moves the Pivot and the Pivot Pulls the Spring. The Spring Pulls the Governor Arm and the Governor Arm Moves the Throttle Shaft. Usually the Spring is in the Lower Hole in the Governor Arm and the Solid Link is in the Top Hole of the Governor Arm.** If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens

Posted on Sep 24, 2008

  • 24 Answers

SOURCE: Drive and blade engagement shutsdown the engine.

Sounds like the seat safety switch.

Posted on Mar 06, 2009

  • 3 Answers

SOURCE: Huskee 25 hp lawn tractor with briggs & stratton motor wont start

Most all manufacturers have the Users Manuel available on line you will need the Make and Model to pick the correct one. Have you replaced the battery. It can show the correct voltage but have no cranking amps. I believe if the solenoid is trying to engage the Dead Man switches are closed. With the starter disconnected from all power sources do the teeth on the starter turn or are they locked up? If they refuse to move do you have an Auto Zone around or another parts store or electrical engine repair store that can test the starter. Make sure the mowing deck is not engaged while you are trying to start the engine. I hope these rudimentary suggestions help.

Posted on Jul 18, 2009

panilling9
  • 284 Answers

SOURCE: how to adjust valves on briggs and stratton 17.5

Remove spark plug
Remove cover from engine that covers the flywheel
Remove rockerarm cover or valve cover
Find TDC (top dead center) by rotating the flywheel by hand and your finger over the spark plug hole as you rotate the flywheel you will feel pressure against you finger at some point then stop.
This is the compression stroke it is called now find a long slim round piece of plastic or plastic ink pen to stick in the spark plug hole (If you are careful a slim screwdriver can be used ) and find the piston top, then slowly rotate flywheel again (cw) as the piston is moving up pushing the plastic up as you rotate the flywheel slowly.
a max. piston up or tdc as you turn you will feel and then the piston starts to go the other way,at that transition this is tdc (piston is on top of stroke) leave it there,,both valves should be closed at that point.
Have a feeler gauge and set the exhaust valve at a loose .002 and the intake a loose .004 be sure engine is cold when valves are adjusted
Feeler gauge goes in between the rocker arm tip and valve stem top for each valve setting.
Note the rocker adjustment at the push rod side of each valve by tightening and loosening to make adjustments,lock your adjustments in place and rotate flywheel a few times and recheck settings

Posted on Sep 20, 2009

miket756
  • 2702 Answers

SOURCE: My Briggs & Stratton Diamond I/C 13.5 HP has

it could be worn out piston rings letting unburnt fule past into the sump oil

Posted on Jun 20, 2010

Testimonial: "Thank you for theinformation. I did suspect it may be the Piston Rings but I always thought you would get heavy smoke from the exhaust if the rings were going??"

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Hello, sorry to be the bearer of bad news, but the trans-axle on this is a sealed unit and oil cannot be added. The only thing you can do is an air purge or replace the trans-axle.

Doing a purge is really easy:

  1. put transmission in the freewheel mode so you can push it, ensuring that it is on a flat surface
  2. start engine and run full throttle
  3. release clutch brake
  4. push the drive pedal or lever to the full forward position for a ten count
  5. push the drive pedal or lever to the full reverse position for a ten count
  6. repeat steps 4 & 5 three times
  7. depress & lock the clutch brake
  8. return the transmission to the normal mode
  9. drive tractor
If this fails to correct the problem you may need to replace the transaxle.

If you find this helpful please vote yes. Thank You!!

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You didn't indicate what model so I don't know if it is hydrostatic drive or not. If it is not hydrostatic drive, it is most likely a worn belt or clutch adjustment. If you don't have your manual you can download one here:http://www.mtdlawnmowerparts.com/manuals.php
If it is hydrostatic drive it stil could be the drive belt or low water in hydrostatic transmission, or even water in the oil in the hydrostatic transmission. Always list model number when asking questions.

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