Husqvarna LT112 briggs&stratton 12hp won´t start

S

shefki

Member
Any advise where to start investigating this?

Battery is fine and it tries to ignite when starting.

Here is the video from unsuccessful startup try.
 
As a kid with a kickstart 3/4 hp Briggs that wouldn't, I'm asking , what can it be? " This Old timer said "Son, if you got good compression, good gas, and good spark at the right time, It's gotta run. Still true. Just more things to interfere now.
Eightwide.
 
Google will not let me look at the video unless I sign up for all sorts of spy wear that I have no intention of doing.
If I wanted the world to know what size undies I wear & when I take poo I would be on Feaces Book and use an android phone
 
Sorry for your troubles. Video sharing should work now.

drive.google.com

20200816_213531.mp4

drive.google.com drive.google.com

This is just a kind request to get some help on the issue and how to start investigating it. Give a reply if you want to help.
 
I can hear what sounds like blades spinning when the engine is cranking
If the PTO is on and the engine cranks then there is a big problem with the electrics.

OTOH if the rattle & rumble is the flywheel spinning loose on the crankshaft then the fix is to replace the timing key & proper;ly tighten the flywheel down

So start by removing the blower housing and see if the flywheel is spinning the engine or just spinning loose on the crankshaft
If it looks OK then remove the kill wire to the coil and crank the engine
If you get no spark then the coil is Stuffed
If you get a spark the coil is OK

It also seems to be spinning too fast like the plug is out or the cam shaft is broken.

But do the first few test & get back to us.
Time for me to hit the farter but some of your countrymen should be awake long enough to work out what is happening if you do the tests & post the results.
 
Thanks for your kindly help, much appreciated! I will do as advised and start identifying the root cause.

I´ll keep you updated.
 
shefki said:
Any advise where to start investigating this?

Battery is fine and it tries to ignite when starting.

Here is the video from unsuccessful startup try.
Click to expand...
that thing is spinning free with zero compression as though the piston rod has broken or something

to be honest i wouldnt waste time on it and just buy an old craftsman or murray riding mower and use the 15-16hp engines that come on them as an upgrade replacement. you can buy old mowers with running engines that have bad decks on them for $50-$100 all the time
 
I would remove the spark plug and get a pencil or small object that will fit in the plug hole, rotate the engine by hand, or have someone just bump the starter and see if the piston is moving, or you could also just remove the spark plug and place your finger over the plug hole to feel if there is any air being displaced by piston movement.
 
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