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  #1  
Old 05-27-2009, 07:47 AM
R Bedell R Bedell is offline
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Default Kohler Modification
Well Guys:

Monday night while working in the yard, my 1450 spit and sputtered and then died. I could not restart it. Traced the problem down to NO SPARK. Since the tractor was out in the yard, had my son drag the 1450 back to the shop for in depth analysis. Traced the problem down to a bad HV Ignition Coil.

Now this isn't a serious thing BUT this is the second time it has happened it 2 years. SO.... I got to thinking. This coil is mounted on the RH side of the cooling fins.....right where all the heat and vibration is. I am thinking this is a harsh environment for this poor coil. There must be a better location.

So, studying the situation for a while, I decided to relocate the coil. I decided to mount the coil in the LH side of the pedestal area under the dash. No heat and less vibration. So I did it. Had to rewire the (+) ignition wire, points wire, and Spark Plug wire. Started the ole girl up and all was fine again.



Only time will tell if this modification will be kinder to HV Ignition Coils.

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[B]Roland Bedell[/B]

CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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  #2  
Old 05-27-2009, 08:18 AM
JMD JMD is offline
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You could wrap coil in thin strip of rubber to help with vibration I don't think case has to be grounded. Good idea to relocate.
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Old 05-27-2009, 09:04 AM
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jcrews jcrews is offline
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Roland
I know you have a camera, lets see some pictures
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  #4  
Old 05-27-2009, 09:08 AM
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MBounds MBounds is offline
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Roland...Relocating the coil could be an excellent idea but how did you handle the condenser ground/connection to the coil (-). I suspect that grounding it to the pedestal may eventually create the same ground circuit resistance problem found at the IH battery ground location....or did you bolt it to the engine and just use a looooong pigtail??

Myron
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  #5  
Old 05-27-2009, 09:21 AM
R Bedell R Bedell is offline
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Ah Myron:

Good Question......

I ran an extra Ground Wire from the from the frame to the Condenser mounting tab.

Then of course, my 1450 is loaded up with extra grounding. :biggrin2.gif:
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[B]Roland Bedell[/B]

CC Models: 100, 105, 1450, 782, (2) 784, & 2072

[SIZE="4"][B][COLOR="Red"]Buy:[/COLOR][COLOR="Blue"] Made in the USA[/COLOR][/B] [/SIZE]:American Flag 1:
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Old 05-27-2009, 09:30 AM
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MBounds MBounds is offline
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Roland: I suggest that you add the condenser info to your original post and put it in the Tech "fix-it" section. For folks blowing coils regularly, this could be a great solution to their problems....A photo or two for the conceptionally challenged would likely be helpful also.

Myron
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  #7  
Old 05-27-2009, 10:53 AM
RChristensen RChristensen is offline
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Roland I don't know about the vibration affect on the coils and heat is never a good thing in any environment. But I mow all summer with my 1450 and it is always 100 plus degrees and the coil is the one that came with the 16 hp engine I put in the 1450 8 or 10 years ago. I have the Point saver on the engine and I blow the entire tractor clean every night before I put the tractor in the garage.

My neighbor has a 1450 I rebuilt several years ago and then he made me sell it to him. He mows all summer in the heat of the day like I do and as far as I know it has the original coil. If it failed I would have to replace it for him, you know how it goes when you sell to a neighbor or a relative.

Years ago I had some problems with coils on some of my Cubs that were not used as hard as this 1450. I was buying those coils from NAPA and they had the built in resistor. I finally bought 3 coils from Madsons and replaced the bad one I had at that time and put the two spares on the shelf where they sit today with cobwebbs on them. Maybe the trick is to always have a spare.
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Old 05-27-2009, 09:24 PM
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RPalmer RPalmer is offline
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'Lectrons don't care where they get jazzed up, or where they gotta go

Dirt and grease make a pretty good conductor also. Keep that stuff clean.
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Old 05-28-2009, 12:31 AM
RChristensen RChristensen is offline
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Rust is a pretty good conductor also.......
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Old 05-28-2009, 07:18 AM
R Bedell R Bedell is offline
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UPDATE....

For those points brought up that are vaild.......

Running out of gas and leaving the key on was NOT an issue for me.

NO, the HV Ign Coil does not have to be grounded to operate correctly. Isolating the coil by surrounding it with a rubber material sounds valid.

Richard...I know and value your opinions. I know your testing and AZ environment is HOT. Michigan doesn't come close to hot summers as compared to AZ :biggrin2.gif:
I simply can not say why two of my Kohler Ign Coils had a short life. Granted the first one was the original.

IIRC, I read somewhere (Old age & CRS creeps in here) that maybe it was Engineer David Kirk commented about moving the coil to a less harsh location. I am thinking, I will give this a try also.
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CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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