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Timing a Briggs & Stratton mag.


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Old 03-25-2013, 06:31:08 PM
shakeyjake36 shakeyjake36 is offline
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Default Timing a Briggs & Stratton mag.

I have an OLD briggs with a magneto. Trouble with this engine is it has no plates left anywhere to identify it. I took the mag. off cleaned the points , oiled a few things and came up with a nice blue spark. Now I have to put it back on. This is one of those engines with the pipe plug on the side . I found the timing mark on the mag, and the mark on the crank gear, but with the mag installed you can't see the mark on the crank. What am i missing?
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Old 03-25-2013, 06:44:13 PM
Heins Heins is offline
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Default Re: timing a B&S mag.

Are you sure it isn't a Wisconsin? Turn the engine to TDC, turn the mag until the impulse clicks and put it on the engine. TDC on the engine should be when the key way on the crankshaft is up. Check the timing by turning the engine and see where the key way is when the mag clicks. It should be just past TDC.
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Old 03-25-2013, 06:46:28 PM
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John Newman, Jr. John Newman, Jr. is offline
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Default Re: timing a B&S mag.

If your engine has a seperate (external) magneto, it is not a Briggs & Stratton. More likely a Wisconsin.
Turn the mag in its normal direction until the impluse snaps. (watch out for the spark!). Leave it in that position. May have to cycle it through a few times to get the feel for it and not go past. Then set the engine at TDC. The keyway in the PTO shaft will be at 12 o'clock. There may or may not be an indicator stamped in the blower housing and a flywheel vane that is stamped with an X. These should line up when at TDC. Carefully install the mag without moving anything and it should be timed.
I must type too slow....
Picture are always helpful.
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Old 03-25-2013, 08:44:19 PM
RSCurtis RSCurtis is offline
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Default Re: timing a B&S mag.

With the engine at TDC, there should be an "X" on the mag. gear that will appear in the center of the hole when the timing is correct. It doesn't matter which stroke the engine is on, the mag. runs at crank speed.
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Old 03-25-2013, 10:13:52 PM
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Steve Kreiner Steve Kreiner is offline
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Default Re: timing a B&S mag.

Pictures of the engine.
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Old 03-26-2013, 11:20:14 PM
oldschoolwisconsin oldschoolwisconsin is offline
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Default Re: timing a B&S mag.

Its probly a wisconsin, and it does have a timing mark on the mag gear itself, AND also on the gear that meshes with the mag gear, that one is really hard to see. I have a manual on how to time an AHH wisconsin magneto on my other computer. Also, be careful with those gears, if it is an AHH wisconsin, they are NOT hardened steel. They are made of mild steel, I found this out the hard way, and my mag drive gear has alot of divets in the side from my method of removing it. Luckily, theres no tooth damage from my misguided removal method
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Old 03-26-2013, 11:32:01 PM
oldschoolwisconsin oldschoolwisconsin is offline
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Default Re: timing a B&S mag.

Does your engine look like the one in this pic:
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Old 03-28-2013, 07:40:32 PM
shakeyjake36 shakeyjake36 is offline
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Default Re: timing a B&S mag.

No, it's not that nice.
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Old 03-29-2013, 11:37:22 PM
oldschoolwisconsin oldschoolwisconsin is offline
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Default Re: timing a B&S mag.

Quote:
Originally Posted by shakeyjake36 View Post
No, it's not that nice.
Well mine is nicer than the one in that pic, that pic I found on google. Basically I was wondering if your engine looked like that to identify if it MAY happen to be a Wisconsin model AHH. anyway, I have a pic of the timing for the AHH engines on another hard drive. Too bad I forgot to transfer it to this laptop, or id upload it.
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Old 03-30-2013, 07:00:33 AM
shakeyjake36 shakeyjake36 is offline
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Default Re: Timing a Briggs & Stratton mag.

From what everyone is saying hear, I am going to guess you all are correct and say it is a Wisconsin. Thanks folks.
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