Engine Troy Bilt died while using and wont restart

GaryTroy

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Oct 7, 2017
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First off,thanks for allowing me in this forum.
I own a TroyBuilt push mower with belt driven rear wheels.Engine has OHV.
While using mower 2 weeks ago unit first was hard to start. Usually starts fist pull.Sounded like there was a compression leak.checked plug and was tight. Pulled a few more times and it started. Started mowing,felt ok. Emptied bag and restarted.Took 3 pulls but started.As im mowing the unit gave me a massive backfire and shut down. No,I didnt hit anything. It just backfired and stalled. Will not restart. I have small spark,plug looks good,not wet with fuel or oil. Electrode black like running a little rich..Removed pull cord,checked for crap between coil and wheel and did the bussiness card gap adj. Still wont start. Havent tried Ether in carb to start,nor have I looked at keyway as of yet.
Any experiences with these units doing this? model#12ABD3BZ71.1
 

ILENGINE

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Going to need the model number information from the engine since Troybilt doesn't show what engine your mower has. I suspect you have a carb problem which could include water in the fuel or a clogged main jet.
 

Fragger

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try the ole ether trick that will let you knw if it is fuel or electrical , just saying oh and thank you for your inquire lots of knowedgeable folks here to help :thumbsup:QUOTE=GaryTroy;279538]First off,thanks for allowing me in this forum.
I own a TroyBuilt push mower with belt driven rear wheels.Engine has OHV.
While using mower 2 weeks ago unit first was hard to start. Usually starts fist pull.Sounded like there was a compression leak.checked plug and was tight. Pulled a few more times and it started. Started mowing,felt ok. Emptied bag and restarted.Took 3 pulls but started.As im mowing the unit gave me a massive backfire and shut down. No,I didnt hit anything. It just backfired and stalled. Will not restart. I have small spark,plug looks good,not wet with fuel or oil. Electrode black like running a little rich..Removed pull cord,checked for crap between coil and wheel and did the bussiness card gap adj. Still wont start. Havent tried Ether in carb to start,nor have I looked at keyway as of yet.
Any experiences with these units doing this? model#12ABD3BZ71.1[/QUOTE]
 

GaryTroy

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Oct 7, 2017
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So.still down. But finally got some time to gather more info on the mower.
1)Unit model is Troy-Bilt 360
2)Engine Model is Briggs & Stratton 121S 02 0068 F1.
3)Engine is a 190cc with OHV

Found Broken Keyway. Replaced. Have excelent spark. Tore carburator apart and cleaned. I have no compression. 0 PSI. Removed rocker cover. Rockers attached,pushrods not bent,have movement on valves. Sounds like compression is lost around the head gasket area.
Headgaskets known to go on these things?
 
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Yea all the time the head gaskets go out, but they still run mostly ~!~!
 

GaryTroy

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Oct 7, 2017
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Well, found problem. Missing 2 inches off head gasket. The cause was a loose headbolt. Would show but dont know how to post a picture.
 

zman111666

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Gotta have 5 posts to put up a pic, then it's real easy, the option will be right above where you are typing.
 

GaryTroy

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Thanks for all your help.
 

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