B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

Wegdeone

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
The backstory...found a crankcase oil leak, decided to keep a check on it and finish the small amount had left to cut. Since it would only take less than 10 minutes. I shut the mower and motor off to move some things and when I returned the ignition didn't work, turn the key, nothing. Jumped starter to battery it started right up so I put it away. I changed the crankcase gasket and other seals, re-assembled all and it won't start. No response at all turning the key, turns over like crazy when I jump it but will not fire. I also replaced one head gasket since I took it apart looking for the leak. To answer any "did you" questions before hand....

Crank/cam timing marks were right when reassembled
Double checked all carb linkages correct
adjusted governor
it has spark
checked and replaced ingnition coil/solenoid
it's getting fuel
Checked (multimeter)/cleaned ingnition switch
checked seat safety switch
checked power to carb solenoid
checked action of carb solenoid
cleaned flywheel contacts and gapped contacts

I think that's everything...I am out of ideas.
Again...turn the key, nothing (hour meter readout doesn't even show), jump it, it turns over find, does not fire, one or two backfires, even using starter fluid, no luck.
 

Boobala

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
Re: B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

A few more things I would check ...... Battery cables on the right terminals ..?? Flywheel keyway .. ?? Ignition switch ..??
 

Wegdeone

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
Re: B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

All good. Flywheel fine. Battery correct. Ignition switch cleaned and checked with a meter in all positions, I even installed a new one before I found the pin out diagram to check the old one.
 

shiftsuper175607

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
Re: B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

All good. Flywheel fine. Battery correct. Ignition switch cleaned and checked with a meter in all positions, I even installed a new one before I found the pin out diagram to check the old one.

Something is unplugged, wired wrong, or blown fuse.
Evidently the ingnition coil is grounded.

It was firing before...it is not now.
 

Wegdeone

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
Re: B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

Coil grounded yes, fuse checked on a multitester good, I ever cleaned out the fuse holder with contact cleaner. I checked and cleaned all the connections. Yes before the oil leak fix, even when the ignition stopped working it fired right up when jumped.
 

Tinkerer200

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
Re: B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

Suggest you unplug the "Kill wire" harness at the base of each coil and try it. Sounds to me like a bad harness.

Walt Conner
 

Wegdeone

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
Re: B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

Suggest you unplug the "Kill wire" harness at the base of each coil and try it. Sounds to me like a bad harness.

Walt Conner

No luck...both disconnected, same result
 

shiftsuper175607

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
Re: B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

No luck...both disconnected, same result

What do you mean by..."coil grounded, yes.

I was making the point the coil should not be grounded.
When the key is turned to "off"...that grounds the coil and kills the spark. To shut off mower. Other things "safety switches" can ground the coil to prevent spark.

Normally the coil grounds through the spark plug as the engine runs...jumping the gap to ground to provide spark.
 

Wegdeone

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
Re: B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

What do you mean by..."coil grounded, yes.

I was making the point the coil should not be grounded.
When the key is turned to "off"...that grounds the coil and kills the spark. To shut off mower. Other things "safety switches" can ground the coil to prevent spark.

Normally the coil grounds through the spark plug as the engine runs...jumping the gap to ground to provide spark.
Sorry I misunderstood the question. How can I test that the coil is ungrounded? I have pulled both plugs and I have spark on both.
 

shiftsuper175607

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  • / B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!
Re: B&S 24hp 2cyl 445677-2188-G5 won't start - Craftsmen YT4000 tractor-out of ideas!

Sorry I misunderstood the question. How can I test that the coil is ungrounded? I have pulled both plugs and I have spark on both.


I was understanding you did NOT have spark..

If you have spark now...
If the engine turns over...
The mower should start with a very small shot of starting fluid...with choke open
It may die right a way...but it should start...

Will it?
 
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