Question about Riding Mowers & Garden Tractors
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.
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
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
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
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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