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Apr 26, 2015 #1
J
jak52
Have a Briggs & Stratton lawn mower brought new at Wallmart. Ran a few hours, then lost all compression.
Apr 26, 2015 #2
I
ILENGINE
Get us the model number info for the engine, also how long have you owned the mower.
Apr 26, 2015 #3
S
shiftsuper175607
Have a Briggs & Stratton lawn mower brought new at Wallmart. Ran a few hours, then lost all compression.
Did it come with oil in the mower?
Did you check it...or put some in? How much?
May 3, 2015 #4
J
jak52
Did it come with oil in the mower?
Filled with the break in oil. The piston/crank assembly works fine. Maybe a valve spring broke, or something happened with the cam.
May 3, 2015 #5
J
jak52
Get us the model number info for the engine, also how long have you owned the mower.
961140004 09 Have had it for a few years, obviously should have returned it.
May 3, 2015 #6
I
ILENGINE
Two likely causes of complete compression lose is the rod is broken, or one of the valve seats has came out and is holding a valve open. May want to remove the head and take a look.
May 17, 2015 #7
J
jak52
961140004 09 Have had it for a few years, obviously should have returned it.
The exhaust valve is stuck open, and it isn't being held by the valve seat.
