Tecumseh 5 Hp engine

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  #1  
Old 03-27-12, 04:22 PM
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Tecumseh 5 Hp engine

Hi I have an older push mower with a tecumseh 5 hp motor, I am having a hard time finding the model # on the engine.
The mower was made by Noma Outdoor Products Model B2250000, Serial 017999.
The engine will turn when pulled with the recoil but get hard at a certain point and the engine will not start, I removed the head and the vavles move so does the piston, when I turn it by hand but it gets tight in a certain spot.
Your help would be appericated.
Thank You
 
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Old 03-27-12, 06:58 PM
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Post the engine info usually stamped in the engine shroud by the spark plug and someone will get you going. Have a good one. Geo
 
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Old 03-28-12, 04:43 AM
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When you say it gets hard at a certain point when pulling the cord is it the normal feel as you get to the compression stroke or does it suddenly stop hard like metal hitting metal? When you had the head off could you turn it through all cycles without it stopping? Have you checked that you are getting spark at the spark plug?
 
  #4  
Old 03-28-12, 08:56 AM
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crankshaft bearing out

It sounds like it may be a crankshaft bearing on the bottom side that may be out or the crankshaft itself could be bent.
 
  #5  
Old 03-29-12, 07:06 AM
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Thank you for your response,
I have A Tecumseh 5 hp engine Model # TVS120636278 Serial #1086K
It pulls hard and will not start how do you remove the round collar on the blade side of the crankshaft in order to take the engine apart? Is there a special puller? How would one check the bottom bearing?
Thank You
 
  #6  
Old 04-02-12, 08:19 AM
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Sorry gave the wrong model # it should be tvs12063627g.
Took the engine apart and if I loosen the bolts on the connecting rod the piston will move freely in the cylinder,when I tighten the bolts it binds in a certain spot.
Is there a way to check the crankshaft to see if it is bent with it out of the engine?
Thank You
 
  #7  
Old 04-02-12, 08:32 AM
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So, did you hit something with the mower? I remove the spark plug from the engine and have someone pull the starter cord while I look at the protruding end of the crank. As the engine is pulled through it's pretty easy to spot the shaft wobbling. If true it should turn dead true. If you sight across the shaft to a fixed object or if you hold a fixed pointer up to the shaft you can easily spot if it's very slightly bent but usually it's pretty easy to spot without any special technique.
 
  #8  
Old 04-02-12, 02:09 PM
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Thank You for your response I did not hit anything with this mower, but others use it at my moms house they all say no, but you know how that goes.
I have the crank out of the engine and was hoping there was an easy way to determine if it is bent without putting it all back together.
We like the mower because it has the big wheels in the back made of metal like a bike tire, and the new mowers with the large wheels are all plastic.
Thank You
 
  #9  
Old 04-02-12, 04:38 PM
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You can set up two parallel rails of metal or strips of wood spaced apart so they support the crank at the bearing locations. Then slowly roll the crank along the railroad track you made and see if the output (mower blade) end of it wobbles.
 
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