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Push rods bending

Bent two push rods in june and again in late sept. sitting on the tractor on the left side. a friend told me that their have been problems the 25 hp. engine bending push rods. the tractor is 8 yrs. old. i changed oil and filter every 100 hrs. like the book says.

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  • gossett501 Nov 22, 2008

    the engine is a 25hp briggs and stratton engine. model no. 445777 and the type is 0154-e1

  • Backlash465 Feb 01, 2009

    I have the same problem. My engine is on a Poulan riding lawn mower. I noticed it had no power all of a sudden. With the blades turned on the motor work choke of. I pulled the cover and found the top push rod bent and the bottom one had dropped loose from the rocker arm. How do I fix it and what do I do to stop it from happening in the future?

  • chris killeen
    chris killeen May 11, 2010

    what is the engine make please? A model number would be great as well. thanks.

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6 Suggested Answers

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SOURCE: 24 hp engine. one bent push rod, second rod

This happened to me,the engine sat for some time and the valves were varnished with stale fuel,they stuck in the guides.This bent the push rod and it was only running on one cylinder.The missing push rod worked its way into the crankcase through an oil passage . I took the engine sump of and found the push-rod. I cleaned removed the head,cleaned the valves and guides replaced push rods and gasket and it ran fine after that.I use fuel stabilizer now,it keeps the varnish from forming.

Posted on Jul 31, 2009

  • 57 Answers

SOURCE: Need to Change the oil

On most likely the right side of the engine is where you will find the oil drain. It will likely be in the form of a pipe with a cap. On most of these models the will not be an oil filter. Briggs and Stratton recommends SAE 30 engine oil. Also log on to mtdproducts.com and you should be able to download an operators manual. The model and serial # are located under the seat.

Posted on May 18, 2009

  • 21 Answers

SOURCE: 24 hp engine. one bent push rod, second rod missing

just found the same problem on my father in laws mower (24 hp briggs) I took the engine off of the mower, drained oil, turned on its side and removed lower case. There was the missing pushrod wraped around the camshaft gear. no clue on how in the hell it did that! It also ended up breaking the govenor (quick look) will look for more damage tomorrow.

Posted on Jul 27, 2009

moretons
  • 155 Answers

SOURCE: oil capacity for 14.5 hp briggs engine

That would be 1.2lt to 1.4lt from empty

Posted on Aug 12, 2009

  • 61 Answers

SOURCE: No spark in JD lawn tractor engine

it could just stuck, loosen see if moves reset points.

Posted on Sep 07, 2009

  • 7116 Answers

SOURCE: My 24hp Briggs and Stratton ohv engine has bent push rods.

unable to answer if valve opened or not but does sound like ur bottom valve is bent or piston made contact and bent it to fix need to remove head and replace valve also need to inspect piston face is not damaged from possible contact

Posted on Apr 12, 2010

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1 Answer

What would cause both pushrods on left cylinder to bend


One ting that cause a push rod to bend is a valve guide that work it way out causing bottoming the spring travel. I haven't seen this person but work with others on finding the problem.

It is strange that both bent would be bent; although a valve that broken free could this too. Since OHV valve guides are generally not available as a replacement part the only solution is to replace the head.

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Sounds like you're timing is off this unit have a timing belt or timing chain it might've jumped to the valves may be opening two early or too late hit in the Pistons

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Hi, had it been sitting some time unused?
Sounds like the valves are stuck in their seats and the rods bent when the motor pushed them with the cam.
You might be lucky and the one that fell in didn't get into the works.
Make sure you fish it out before doing anything else.
I'm guessing it is the typical side valve type motor?
Remove the valve cover (I guess you have already to get the push rod out) and using some sort of lever try and move the valves up against against their springs. Don't bend them with sideways pressure though. If they're stuck some CRC / WD40/oil or similar will help to get them moving. Remove the spark plug and spray CRC etc onto the valve heads inside the cylinder.
Assuming the push rod hasn't contacted anything moving while the motor was being wound over and done more damage, you should be good to go with new push / 2nd hand push rods. Just check there is some clearance between the push rod and the valve stem when each valve is closed.

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While making a hard left turn the front left tire jammed against the mower body and I had to put it into reverse to straighten it out. Now the mower will not turn to the right. I can turn the tires by...


Nothing is broken,just bent.Go to the front of the mower.Get low.In between the front wheels you will see a bar,or rod.It looks like a tie rod on a car.That bar should be bent slightly but when you hit something with the front tier it gets bent too much.One end of the bar screws in and the other nd is on a clip or pin.Remove one side,which ever is easiest for you.Then just bend the bar back to almost straight.You may have to do this several times to get the turning radius back to normal.

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Last december we went to adjust the valves for the first time and there were no push rods installed on the left side. We installed new push rods and it has run great until now. Sept. 2010. both push rods...


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i have about the same engine and mine will not even start, although i've used starting fluid and have spark on the plug still it will not fire up. if the rod is bent will this keep my engine from trying to start(fire) please respond to savannah_316@netzero.com thanks.

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My 24hp Briggs and Stratton ohv engine has bent push rods on one side. The top valve can be pushed in but the bottom one will not push in. Is the valve stuck in the open position? If so how can it be...


unable to answer if valve opened or not but does sound like ur bottom valve is bent or piston made contact and bent it to fix need to remove head and replace valve also need to inspect piston face is not damaged from possible contact

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I have a Husqvarna YTH 2348 the deck anti sway bar came looses fell of frame and bent, I removed rod strightened and need to kown how to put rod back in proper location on the frame and deck bracket


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