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Wisconsin Engines Single cylinder up to V4 engines.

Wisconsin Engines

V4 Wisconsin, no spark


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  #1  
Old 04-07-2009, 10:50:34 PM
Michaeljp86 Michaeljp86 is offline
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Question V4 Wisconsin, no spark

I just got a wisconsin V4 vg4d and it has no spark. I have it sitting on the barn floor, its not wired up so maybe I missed something. On the side of the distributor, if thats what it is there is a threaded stud, I think this is a greound wire to the key switch for when you want to cut the spark. I think it has a solid state ignition, it has to coil.
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  #2  
Old 04-07-2009, 10:58:37 PM
Jim Tremble Jim Tremble is offline
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Default Re: V4 Wisconsin, no spark

It sounds like the distributer, as you call it, is in fact a magneto. The threaded stud is to ground out the mag and stop the engine.

Clean the points and see what happens.

Jim
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Old 04-07-2009, 11:02:33 PM
Michaeljp86 Michaeljp86 is offline
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Default Re: V4 Wisconsin, no spark

I cleaned the points and it didnt help, I get nothing, not even a small spark.
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Old 04-07-2009, 11:15:25 PM
TWest TWest is offline
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Default Re: V4 Wisconsin, no spark

Once you cleaned the points make sure that they are re-gaped to the proper distance. If you are still having problems the next step would be to see if the condenser is working properly. Try putting another one in its place or disconnect it all together and see if you get any spark.

Also make sure that the magneto cap is clean and filed so good contact can be made throughout.
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Old 04-07-2009, 11:19:16 PM
Michaeljp86 Michaeljp86 is offline
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Default Re: V4 Wisconsin, no spark

How do you gap the points? I took the cap off and the rotor has the little tab but I cant see how to change any of that, I thought the gap was a little large from the rotor to the points on the cap.
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Old 04-07-2009, 11:23:09 PM
Jim Tremble Jim Tremble is offline
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Default Re: V4 Wisconsin, no spark

I can see you have not cleaned the points, yet.

When you removed the cap and rotor, there is another part you have to remove to get to the points. Try that and let us know what happens.

Jim
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Old 04-07-2009, 11:24:15 PM
Michaeljp86 Michaeljp86 is offline
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Default Re: V4 Wisconsin, no spark

Isnt the points the little pins under the cap?
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Old 04-07-2009, 11:30:15 PM
Jim Tremble Jim Tremble is offline
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Default Re: V4 Wisconsin, no spark

NO !!! Take the cap and rotor off and then remove the cover under the cap, on the mag. There you will find the points and condenser. After cleaning, set the points to .018"-.020".

Jim
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Old 04-07-2009, 11:32:04 PM
Michaeljp86 Michaeljp86 is offline
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Default Re: V4 Wisconsin, no spark

ok, Ill check that tomorrow, this is why I like diesels
Thanks for the help
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Old 04-07-2009, 11:32:11 PM
TWest TWest is offline
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Default Re: V4 Wisconsin, no spark

Once you remove the cap and rotor, turn the magneto over by means of the gear at the back. It should get hard to do so and snap, which is the impulse. When you turn it over look closely in the magneto and you should see to pieces of metal opening and closing, these are the points.

Regap them once cleaned with fine snadpaper to the specifications of what Jim stated.
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  #11  
Old 04-07-2009, 11:37:43 PM
Jim Tremble Jim Tremble is offline
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Default Re: V4 Wisconsin, no spark

Quote:
Originally Posted by Michaeljp86 View Post
ok, Ill check that tomorrow, this is why I like diesels
Thanks for the help
I can see you are not familiar with this setup. DO NOT remove the mag from the engine unless you know how to retime it.

Jim
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Old 04-08-2009, 07:59:15 AM
Phil P Phil P is offline
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Default Re: V4 Wisconsin, no spark

A picture would help so we can determine if you have a magneto or battery ignition.

Phil P
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Old 04-08-2009, 08:18:53 AM
Phil P Phil P is offline
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Default Re: V4 Wisconsin, no spark

This parts book is for an engine very similar to yours.

You should be able to determine what ignition system you have.

http://www.wisconsinmotors.com/partc...es/w4_1770.pdf


Phil P
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Old 04-08-2009, 10:24:06 AM
Michaeljp86 Michaeljp86 is offline
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Default Re: V4 Wisconsin, no spark

If you look on page 23 of that my magnito looks just like that. When I took it apart there was some plastic gears inside and I think its a condeser in there.
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Old 04-08-2009, 10:53:49 AM
Phil P Phil P is offline
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Default Re: V4 Wisconsin, no spark

Then it would be a Fairbanks-Mores. The Wico was a waste ignition and didn’t have a geared rotor.

You should be able to remove the cap and pull the rotor off by hand. Don’t try to pry the rotor off it will break just use you hand. Check to make sure you don’t have one that has a screw or a retainer holding it

After the rotor is removed the condenser and points will be in the lower portion of the magneto. The coil will be in the upper portion of the magneto.

If this is not the arrangement then let me know and we will see about figuring out what has been done to this unit.

Phil P
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Old 04-08-2009, 11:13:08 AM
Michaeljp86 Michaeljp86 is offline
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Default Re: V4 Wisconsin, no spark

The rotor comes off really easy, Im not sure what the points are.

My dad called the guy who had the auction and he said he paid a small engine place $4200 to rebuild this and he never put the trencher back together so the engine should be fine. It just sat in a barn for years.
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Old 04-08-2009, 11:35:26 AM
Michaeljp86 Michaeljp86 is offline
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Default Re: V4 Wisconsin, no spark

The big gear inside the magneto is missing 3 teeth in a row, Im guessing thats a problem? Where do I get a new one?
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Old 04-08-2009, 11:39:43 AM
Phil P Phil P is offline
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Default Re: V4 Wisconsin, no spark

You can try NAPA their Echlin line did in the past have parts for the FM magneto.

If no joy there then go to the Wisconsin web site and check the location for the distributor in your state and call them they will give you the name of the closes dealer.

Have you turned the engine yet?

Phil P
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Old 04-08-2009, 11:41:39 AM
Michaeljp86 Michaeljp86 is offline
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Default Re: V4 Wisconsin, no spark

I turned the engine and noticed these gears stopped spinning and then seen the missing teeth.
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  #20  
Old 04-08-2009, 12:01:14 PM
Phil P Phil P is offline
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Default Re: V4 Wisconsin, no spark

The reason I ask is when those engines are stored a long time the valves will get stuck in the guides. If you force the engine to rotate you can break the camshaft.

You will need the rotor and have you determined the pints are OK? The points have two wires and a copper strap that goes to the terminal on the side of the magneto under the nut on them. One wire to the coil, one wire to the condenser and the copper strap.

Phil P
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