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Strange ignition issue

#1

ChaplainJeff

ChaplainJeff

I have a Troy-Bilt (126T02-0675-B2) push lawn mower with a Briggs and Stratton Model 120000 engine. I can't get it to start. Suspecting the spark plug, I connected my ignition tester from the ignition coil boot to GROUND on the engine block. A spark in the tester gap tells me that the inductor coil is producing current. Removing ground and clipping it to the spark plug shows no spark. Easy... bad plug, right? Well, I replaced the plug and got the same indications. Used a second new plug and still no spark. Only when connecting tester between the spark plug boot and block ground do I get any spark. I am totally stumped. Please HELP! :confused2::mad:


#2

R

Rivets

Your coil is probably going bad. Before replacing, try a couple of of things first. 1. Remove the shroud (engine cover) and then remove the kill wire on the coil. 2. Remove the coil and with some fine abrasive paper, clean the the legs of the coil and the magnets on the flywheel. 3. Install the coil and set the air gap between the coil legs and the magnet to .010". 4. With the kill wire off and the spark test hooked in, no plug, to ground, spin the flywheel by hand. Careful not to get your fingers caught, should spin easy without the plug installed. 5. If you see a spark, insert the plug into the circuit, not in the engine, and spin again. 6. If no spark replace the coil. If spark attach the kill wire and retest. 7. Spark, reassemble engine, no spark start looking for a short to ground in the kill circuit.


#3

ChaplainJeff

ChaplainJeff

Thanks for the speedy help. This mower is brand new from last season. Used it for a couple of months. Stored it for Winter and now it has trouble. Go figger!

Rivets said:
Your coil is probably going bad. Before replacing, try a couple of of things first. 1. Remove the shroud (engine cover) and then remove the kill wire on the coil. 2. Remove the coil and with some fine abrasive paper, clean the the legs of the coil and the magnets on the flywheel. 3. Install the coil and set the air gap between the coil legs and the magnet to .010". 4. With the kill wire off and the spark test hooked in, no plug, to ground, spin the flywheel by hand. Careful not to get your fingers caught, should spin easy without the plug installed. 5. If you see a spark, insert the plug into the circuit, not in the engine, and spin again. 6. If no spark replace the coil. If spark attach the kill wire and retest. 7. Spark, reassemble engine, no spark start looking for a short to ground in the kill circuit.
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#4

R

Rivets

Stop immediately. If it is brand new, it is still under warranty. Minimum of two years from date of purchase. Do not do any more work or attempts to repair. Take it to a Briggs authorized repair shop. If what you say is the truth they should repair for you at no cost.


#5

Fish

Fish

Leave the tester aside, with the spark plug removed but plugged onto the coil, lay the metal side of the plug firmly against some metal of the block [grounded] and pull the rope. Any spark?


#6

ChaplainJeff

ChaplainJeff

I did check it with the plug as suggested. Negative results as with the inition spark tester.

Fish said:
Leave the tester aside, with the spark plug removed but plugged onto the coil, lay the metal side of the plug firmly against some metal of the block [grounded] and pull the rope. Any spark?
Click to expand...


#7

ChaplainJeff

ChaplainJeff

I have found an authorized repair facility. Now, to find proof of purchase. I usually keep good track of such things.

Rivets said:
Stop immediately. If it is brand new, it is still under warranty. Minimum of two years from date of purchase. Do not do any more work or attempts to repair. Take it to a Briggs authorized repair shop. If what you say is the truth they should repair for you at no cost.
Click to expand...


#8

Fish

Fish

What are the numbers off of the engine? The last set of numbers are the date code and may be sufficient for warranty


#9

ChaplainJeff

ChaplainJeff

It looks like 1101215S. I have no idea how to decode it into a date.

Fish said:
What are the numbers off of the engine? The last set of numbers are the date code and may be sufficient for warranty
Click to expand...


#10

GetTechnicalWithJd

GetTechnicalWithJd

ChaplainJeff said:
It looks like 1101215S. I have no idea how to decode it into a date.
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Manufactured 2011 January 21st in factory 5S. You will need proof of purchase.


#11

R

Rivets

Manufacture date won't be a lot of help, just shows when the engine was built. The warranty starts the date of purchase, not build date. If you sent in the warranty then you will not need the receipt. If you purchased it at a dealer, they should have a copy. If you purchased it at a big box store you can go back there to get a copy.


#12

GetTechnicalWithJd

GetTechnicalWithJd

Rivets said:
Manufacture date won't be a lot of help, just shows when the engine was built. The warranty starts the date of purchase, not build date. If you sent in the warranty then you will not need the receipt. If you purchased it at a dealer, they should have a copy. If you purchased it at a big box store you can go back there to get a copy.
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If the code date shows that the engine is less than 2 years old from date of production it goes without saying that it must be less than 2 years since sale date. In this case we have never be required to produce proof of purchase for Briggs Warranty.


#13

R

Rivets

I agree, but it is always best to have the purchase date. According to his date code, he is at least six months out of warranty. He said he purchased it last year, so is going to need a purchase date.


#14

Fish

Fish

Rivets said:
I agree, but it is always best to have the purchase date. According to his date code, he is at least six months out of warranty. He said he purchased it last year, so is going to need a purchase date.
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Yes, but that is not our point.

If the date of the engine build was under the 2 years, then he won't have to scramble for his proof of purchase, which he probably doesn't have...


#15

ChaplainJeff

ChaplainJeff

Thank you, muchly!

LawnmowerJustin said:
Manufactured 2011 January 21st in factory 5S. You will need proof of purchase.
Click to expand...


#16

GetTechnicalWithJd

GetTechnicalWithJd

ChaplainJeff said:
Thank you, muchly!
Click to expand...

No problem. Hope you get it sorted under warranty.


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