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No spark Briggs Intek 20HP

#1

smallengineguy

smallengineguy

I'm working on a Briggs Intek 20HP on a Craftsman LT2000 rider. It has VERY weak spark on BOTH coils. I've unhooked the kil wires from both coils and still weak. Replaced one coil to try, still weak on that one. With all wires disconnected, I would think it would get spark. Flywheel magnet is strong and clean. Any thoughts?


#2

S

seattlepioneer

How did you test for spark?
Have you tried replacing the spark plugs?


#3

S

seattlepioneer

seattlepioneer said:
How did you test for spark?
Have you tried replacing the spark plugs?
Click to expand...
Also, I'd consider the possibility that something else entirely is the problem. Have you checked that the engine is getting fuel by adding some directly into the fuel manifold, checked for good engine compression and checked for good air supply to the carburetor and such?


#4

smallengineguy

smallengineguy

I used an inline spark tester, you can barely see the indicator light up. I tried the tester on another machine, bright as day. New plugs too, but the coils aren't putting out the bright spark.


#5

Fish

Fish

The newer coils produce a weaker looking spark, I am guessing that your problem is elsewhere.
What is or isn't it doing?


#6

S

seattlepioneer

I presume you took care to set the clearance to the coil carefully.

Unfortunately, I can't think of much else there is to this simple electrical system. You've disconnected the grounding wires, replaced the coil and spark plug and the symptoms haven't changed. The only other thing is the magnet which doesn't seem at all likely. I'd start looking at other possible explanations.

Have you checked to see if the flywheel key is broken? Compression good? Fuel actually getting into the engine?

It might help to describe in detail the behavior of the engine when you try to start it, and any changes in it you have noticed when trying various repairs.


#7

S

seattlepioneer

The manual on the mower is at:

Craftsman LT2000 Manual

Craftsman LT2000 Manual. View the Craftsman LT2000 Manual for the Sears Craftsman Model LT 2000 Mower. Find Parts for the Craftsman LT 2000 Mower.
www.lt2000manual.com

Have you replaced the fuel filter?

Page 28 lists reasons why the mower may not start. I'd start checking all of those.


#8

Scrubcadet10

Scrubcadet10

Ah, that's why he has no spark.....


#9

S

seattlepioneer

Werkoztopsy said:
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"Отзыву подлежат 18 563 автомобиля Hyundai Santa Fe (CM), изготовленных в период с 16 марта 2005 года по 22 сентября 2009 года, с VIN-кодами согласно приложению. На транспортных средствах может иметь место короткое замыкание в цепи питания модуля ABS/ESC", - говорится в сообщении на сайте Росстандарта.

В рамках отзывной кампании дилеры проинформируют владельцев автомобилей, подпадающих под отзыв, о необходимости предоставить транспортное средство в ближайший дилерский центр для проведения ремонтных работ. Владельцы также могут самостоятельно сверить VIN-коды своих машин со списком Росстандарта и записаться к дилеру. Кроме того, узнать о наличии автомобиля в отзывной программе можно с помощью специального сервиса на сайте Auto.ru.

На подлежащих отзыву транспортных средствах будет выполнена установка комплекта реле в модуле ABS/ESC. Все работы будут осуществляться бесплатно для владельцев.

Это второй крупный отзыв машин Hyundai за последнее время. В конце июня компания объявила об отзыве без малого 48 тыс. автомобилей Hyundai Elantra (HD), реализованных в период с 17 августа 2005 года по 14 мая 2011 года, из-за аналогичного дефекта системы питания модуля ABS/ESC.

Наши партнеры на 17 июля:
http://forex-blog-uk.blogspot.co.uk/search/?label=https://kredit-na-avto.ru/
http://www.curling.sk/LinkClick.aspx?link=https://kredit-na-avto.ru/
http://www.careerskillsfoundation.net/__media__/js/netsoltrademark.php?d=kredit-na-avto.ru/
http://www.powersave.org/__media__/js/netsoltrademark.php?d=kredit-na-avto.ru/
http://internetfocus.com/__media__/js/netsoltrademark.php?d=kredit-na-avto.ru/
Click to expand...

Now it's perfectly clear!!


#10

Fish

Fish

That's all Greek to me!!!


#11

K

keakar

seattlepioneer said:
I presume you took care to set the clearance to the coil carefully.

Unfortunately, I can't think of much else there is to this simple electrical system. You've disconnected the grounding wires, replaced the coil and spark plug and the symptoms haven't changed. The only other thing is the magnet which doesn't seem at all likely. I'd start looking at other possible explanations.

Have you checked to see if the flywheel key is broken? Compression good? Fuel actually getting into the engine?

It might help to describe in detail the behavior of the engine when you try to start it, and any changes in it you have noticed when trying various repairs.
Click to expand...
this ^^^^
loosen the screws on the coils then put a business card between it and the flywheel then let the magnet suck it tight and then retighten the screws. a business card gets you the right gap but im not sure what the feeler gauge thickness would be if you rather do it that way.

as mentioned, the spark on newer coils isnt as big and bright but if you have a spark, even a weak one, it should start and run

i dont think the weak spark is your problem, hit it with a shot of starting fluid and if it starts then you issue is fuel supply to, or the carburetor itself so confirm the fuel pump is pumping as it should by removing the plugs and running the hose to the carb into a jug and crank the engine over. removing the plugs lets it get a decent rpm going for the test


#12

smallengineguy

smallengineguy

Compression good both cylinders. Getting fuel, pump working, plugs get wet. I have another Intek in the shop with bright spark. I wish I had another flywheel to try. Key was good when I removed the flywheel. It'll crank but won't even try to fire. Coils are completely unhooked, can just barely make out a light on the tester.


#13

Fish

Fish

Well, if you have 2 of the same engine, swap parts until you figure out what the problem is.
I have done that a few times.


#14

Scrubcadet10

Scrubcadet10

What's the engine model number?


#15

S

slomo

Doesn't Briggs re-magnetize flywheel magnets? I saw something about that a while back. It was on a 40 plus year old Briggs engine. Think Donnyboy or Taryl did a video maybe??

slomo


#16

smallengineguy

smallengineguy

The other engine is a single cylinder. This one is model 407777 0174E1


#17

T

TONY THORNTON

WORKING ON MY LT 3000 RIDING MOWER WITH A 20 HP BRIGGS AND STRATTON. INSTALLED NEW STARTER ,COIL AND PLUG. TURNS OVER BACKFIRES THEN STOPS. I HAVE TO TURN THE FLY WHEEL TO GET IT TO TURN OVER AGAIN. ANY SUGGESTIONS. THANKS TONY T


#18

StarTech

StarTech

First stop screaming...All caps is considered yelling at us.

Sounds like you may have two problems. One with the ACR being broken and the other is a possible shear flywheel or broken flywheel. I had one engine earlier that had both problems of a broken ACR on the camshaft and a busted flywheel.


#19

Fish

Fish

Sniff.......

He is screaming.......... Quick someone, I need a hug............


#20

Fish

Fish

TONY THORNTON said:
WORKING ON MY LT 3000 RIDING MOWER WITH A 20 HP BRIGGS AND STRATTON. INSTALLED NEW STARTER ,COIL AND PLUG. TURNS OVER BACKFIRES THEN STOPS. I HAVE TO TURN THE FLY WHEEL TO GET IT TO TURN OVER AGAIN. ANY SUGGESTIONS. THANKS TONY T
Click to expand...
We need to know your model numbers. Model, type, and code.


#21

Scrubcadet10

Scrubcadet10

could be valves out of adjustment too. Like fish said, need the model numbers.


#22

StarTech

StarTech

Fish said:
Sniff.......

He is screaming.......... Quick someone, I need a hug............
Click to expand...
Wait I got to find my HazMat suit. I have protect you from my germs as I am on year 15 of my 7 year itch problem.

Oh darn it I got hole in it.:LOL:

But seriously we you do the equipment numbers but I suspect it going to a 330000 series engine.


#23

Fish

Fish

StarTech said:
Oh darn it I got hole in it.:LOL:
Click to expand...
We need pics!!!


#24

Fish

Fish

Yeah, I am not familiar with tractor models, I just use the number off of the tags and engines. If it is an ohv, it could just be needing a valve adjustment, or a loose rocker arm stud.
If it was an old l-head twin, my suggestions would be a lot different.

So I always ask for the numbers off of the tags, sometimes they will give them.


#25

S

slomo

WHAT DID YOU SAY? lol

slomo


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