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Small Air Cooled Gasoline Engines Briggs & Stratton, Clinton, Lauson, Maytag, Nelson, Wisconsin and other small air cooled engines.

Small Air Cooled Gasoline Engines

My first project: Briggs and Stratton 4


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  #21  
Old 08-10-2016, 12:30:19 AM
CycleKartBow CycleKartBow is offline
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Default Re: My first project: Briggs and Stratton 4

Thank you for the information on the gasket material.

Well, persistence paid off.

Tonight, I hooked up the flywheel puller, gave the extension on the puller a couple of calibrated whacks with a ball peen hammer, and popped the flywheel off with no drama.

There was quite of bit of gunk on the inside rim of he flywheel, so I am happy I pulled it to clean it up. The gunk was cleaned up with some elbow grease, a brass wire brush, and to cut the grease/oil, GoJo cream hand cleaner cut through it well, I still need to clean the outside up.

Is it true that the manufacture date is stamped on the magneto pickups arms?

These ones are stamped "L-41" ... which doesn't sound like a date code, but more like a Part Number...

Does anyone know how to remove that plate that is behind the flywheel (Yellow Arrows in photo), mounted to the block?
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  #22  
Old 08-10-2016, 01:08:59 AM
CycleKartBow CycleKartBow is offline
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Default Re: My first project: Briggs and Stratton 4

I have been looking into dating this engine, since it doesn't have a Tag.

The Old Engines Website states:
Q: How do I date my engine when it has no serial number tag?

A: On the back of the flywheel and on the mag plate, there will be two circles, one with a letter and one with two numbers. The two numbers are the last two numbers of the year the PART was made. The letter equals the month the PART was made. A= Jan, B= Feb., ect. This will give an idea of when the engine was made. Parts could be made a couple months before the engine was assembled.

I when and checked my flywheel again...

G 42

July 1942

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  #23  
Old 08-10-2016, 09:20:54 AM
Arlie Levy Arlie Levy is offline
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Default Re: My first project: Briggs and Stratton 4

The A has 3/4" pipe exhaust and the B 1" pipe exhaust. Very easy to identify.
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  #24  
Old 08-10-2016, 01:20:09 PM
CycleKartBow CycleKartBow is offline
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Default Re: My first project: Briggs and Stratton 4

Quote:
Originally Posted by akuna View Post
Don't forget to put some metal on the magnet. I have never had a problem, however hear it can cause the magnet to loose power and the engine spark.
Interesting, never heard that... I'll try to put it back together before that happens

Quote:
Originally Posted by Arlie Levy View Post
The A has 3/4" pipe exhaust and the B 1" pipe exhaust. Very easy to identify.
Good to know as well.


It is interesting that the HP rating between the A and the B doesn't seam large enough to merit a bigger exhaust port...
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  #25  
Old 08-10-2016, 01:48:19 PM
Vanman Vanman is offline
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Default Re: My first project: Briggs and Stratton 4

Don't know the difference in displacement, but the larger exhaust port might be due to lower rpm. So each exhaust pulse is larger, but less frequent. IIRC, the Model B, as installed on the Kohler plant, is rated at 1-3/4hp. But runs at only 1800 rpm.

Keith

Last edited by Vanman; 08-10-2016 at 07:37:09 PM.
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Old 08-10-2016, 02:09:23 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: My first project: Briggs and Stratton 4

If you replace the high tension lead, DO NOT solder it to the coil! If you do, you may ruin the coil Tin (put solder on) about 1/44 to 3/8 inch of the high tension lead. Carefully remove the old lead from the coil, and crimp the new lead over the lug on the coil.
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  #27  
Old 08-10-2016, 07:30:48 PM
CycleKartBow CycleKartBow is offline
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Default Re: My first project: Briggs and Stratton 4

Will do.

I'll see how the original lead looks after I clean it up some more before i dive into replacing it.
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Old 08-12-2016, 08:45:51 PM
CycleKartBow CycleKartBow is offline
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Default Re: My first project: Briggs and Stratton 4

I removed the carb and intake, but how do they separate? I removed the connection piece on the bottom, but those little guys don't want to come apart.

Also, what is the trick to remove the breather?

I pulled the crankcase drain and the oil that did run out was quite thin, which makes me think there is some serious sludge left in the bottom of the case.
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  #29  
Old 08-13-2016, 01:59:29 AM
CycleKartBow CycleKartBow is offline
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Default Re: My first project: Briggs and Stratton 4

Well, with a bit of persistence, I was able to remove the magneto mount plate and start cleaning the block and head.

I was able to get the intake manifold off with little drama, but the exhaust pipe is still on there pretty solid and Will not budge...

It was a serious weight loss program but the engine is looking better. I still need to figure out how to pull the breather out.

But it is starting to look more like an engine tonight.
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  #30  
Old 08-13-2016, 02:21:37 AM
Vanman Vanman is offline
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Default Re: My first project: Briggs and Stratton 4

Looking good! Curious - did your flywheel have an aluminum key or a steel key?

As I understand it, they all supposed to have aluminum keys. Right now I have two Model ZZs apart, and both had steel keys. One of which likely substantially increased the damage sustained.

Keith
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