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    chriswilliams07's Avatar
    chriswilliams07 Posts: 9, Reputation: 1
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    #1

    May 11, 2012, 06:02 PM
    16.5 briggs and stratton... murray riding mower 42 inch cut. No compression??
    I have a 16.5 murray it will turn over but has no compression and is getting fire took the spark plug out and it doesn't have any compression... can someone please tell me what's going on... I have never worked on one this is my first mower I bought and it was used dumb yes I know but please help!!
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    chriswilliams07 Posts: 9, Reputation: 1
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    #2

    May 13, 2012, 07:51 AM
    Could someone please tell me what's going on here
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
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    #3

    May 13, 2012, 07:54 AM
    How are you measuring the compression?
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    chriswilliams07 Posts: 9, Reputation: 1
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    #4

    May 13, 2012, 08:00 AM
    Quote Originally Posted by ballengerb1 View Post
    How are you measuring the compression?
    Just by hand I don't have any tools like that...
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    ballengerb1 Posts: 27,378, Reputation: 2280
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    #5

    May 13, 2012, 08:15 AM
    So your removed the spark plug and put your finger/thumb over the opening and when cranking you get nothing along the lines of compression, right?
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    chriswilliams07 Posts: 9, Reputation: 1
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    #6

    May 13, 2012, 09:56 AM
    Right no kind of force at all but I kept the spark plug in the coil and put it up to metal and it had fire... just not any kind of compression...
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    ballengerb1 Posts: 27,378, Reputation: 2280
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    #7

    May 13, 2012, 09:58 AM
    Take a flashlight and look into the spark plug hole while someone else turns over the engine. Do you see the piston topping out inside with each stroke?
    chriswilliams07's Avatar
    chriswilliams07 Posts: 9, Reputation: 1
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    #8

    May 14, 2012, 04:55 PM
    Quote Originally Posted by ballengerb1 View Post
    Take a flashlight and look into the spark plug hole while someone else turns over the engine. Do you see the piston topping out inside with each stroke?
    No it looks like it is stuck up if that's what I'm seeing its about an inch or so away from the hole inside...
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    ballengerb1 Posts: 27,378, Reputation: 2280
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    #9

    May 14, 2012, 07:28 PM
    I think you threw a rod. Use a wooden dowel rod or something similar and see if you can push that piston down toward the crank. If you can and the engine shaft doesn't move the rod is gone. Was it like this when you bought it or did it run?
    cnmc2001's Avatar
    cnmc2001 Posts: 4, Reputation: 1
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    #10

    May 14, 2012, 08:41 PM
    Quote Originally Posted by chriswilliams07 View Post
    i have a 16.5 murray it will turn over but has no compression and is getting fire took the spark plug out and it dosent have any compression...can someone please tell me whats going on...i have never worked on one this is my first mower i bought and it was used dumb yes i know but please help!!!!!!!!
    It could have a bad pistion ring or a scored cylinder see if you can see any marks on the pistion or cylinder and let me know what you find out my email is [email protected]
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    #11

    May 15, 2012, 11:00 AM
    No it wasn't like this... it ran great I used it about 20 or 30 hours all together and then it did this... I checked the oil before each use and now the oil is empty or its just on the end of the dip stick anyway.. ok so either way can it be fixed or would it be cheaper just to buy another mower...
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    chriswilliams07 Posts: 9, Reputation: 1
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    #12

    May 15, 2012, 11:01 AM
    Quote Originally Posted by ballengerb1 View Post
    I think you threw a rod. Use a wooden dowel rod or something similar and see if you can push that piston down toward the crank. If you can and the engine shaft doesn't move the rod is gone. Was it like this when you bought it or did it run?
    No it wasn't like this... it ran great I used it about 20 or 30 hours all together and then it did this... I checked the oil before each use and now the oil is empty or its just on the end of the dip stick anyway.. ok so either way can it be fixed or would it be cheaper just to buy another mower...
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    ballengerb1 Posts: 27,378, Reputation: 2280
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    #13

    May 15, 2012, 12:20 PM
    Well we haven't figured out for sure what happened. Can you push the piston down? If so did the crank shaft turn? Does the piston move up and down when you try to start with the spark plug removed? How old and what condition is the tractor?
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    #14

    May 15, 2012, 04:11 PM
    Quote Originally Posted by ballengerb1 View Post
    Well we haven't figured out for sure what happened. Can you push the piston down? If so did the crank shaft turn? Does the piston move up and down when you try to start with the spark plug removed? How old and what condition is the tractor?
    Nothing moved when I tried puttin something in there to move it... no the piston doesn't go up and down its like its stuck right where its at... the tractor is in great shape its about 8 or 9 years old... well other then wats going on its in great shape...
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
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    #15

    May 15, 2012, 04:52 PM
    And if you tried to start it that piston stays in sight, doesn't move. If so you might want to price a short blck. Brand New Engines - Briggs & Stratton Short Block Engines
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    chriswilliams07 Posts: 9, Reputation: 1
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    #16

    May 15, 2012, 05:47 PM
    I went and took the valve cover off and they are kind of loose... it still had a good amount of oil in it and it was all clean like new clean the oil was kind of dark but not bad.. but anyway thank you very much for your time I really appreciate you for taking the time out of your day to help...

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