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Help With Briggs and Stratton


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  #1  
Old 06-17-2018, 10:54:48 PM
Shamus1 Shamus1 is offline
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Default Help With Briggs and Stratton

Hello to everyone, new user and seeking some assistance. I have a Briggs and Stratton single cylinder engine with a manufacturer's plate that is very difficult to read. I have determined the above info and a model number, engine type number and code number, in the above order they are; 23A FB, 703692, 793546. I believe it to be circa 1964 and possibly about 9 H.P. Unfortunately it has sat, partially covered in the weather for some time and due to this, I found it necessary to remove the flywheel. I did this to clean it and the associated components of the ignition system. Having done that, I attempted to replace the flywheel when I realized it has no keyway. The crankshaft does have a small keyway but the flywheel has none. It is a tappered shaft and I am concerned as to how the engine is timed! Would anyone be able to offer advice re this situation as I have not been able to find any workshop manual pertaining to this old engine. Would be most grateful for any suggestions. Thank you.
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Old 06-17-2018, 11:31:19 PM
EvilDr235 EvilDr235 is offline
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Default Re: Help

A model 23A does need a key to time it. The flywheel does not have magnets. The magnets are on the rotor that is keyed to the crankshaft to time it. Some later model 23 engines are keyed to the flywheel because they use a different magneto type. Someone here can probably steer you to some Briggs PDF files so you can see the different models of model 23 engines.

---------- Post added at 11:31:19 PM ---------- Previous post was at 11:28:24 PM ----------

Oh yeah, welcome to SmokStak.
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Old 06-17-2018, 11:31:59 PM
Thaumaturge Thaumaturge is offline
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Default Re: Help

My guess is keys are there, but that the key has sheared off flush with both surfaces.
Once found and removed a new key will be needed.

Oh... my ignorance.
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Old 06-17-2018, 11:33:09 PM
EvilDr235 EvilDr235 is offline
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Default Re: Help

That is does not need a key to time it. Sorry.
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Old 06-17-2018, 11:44:25 PM
gdstew gdstew is offline
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Default Re: Help

hope this helps

https://www.briggsandstratton.com/co...0-domestic.pdf
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Old 06-18-2018, 10:59:35 PM
s100 s100 is offline
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Default Re: Help With Briggs and Stratton

Welcome Shamus 1. Evil Dr is correct, the flywheel is not keyed to the crankshaft. The magneto rotor is located behind the flywheel (closer to the engine block) and it is best to not remove it if you don't have to as timing it is a bit fussy. Actually not fussy but hard to explain here. The maintenance manual provided by gdstew does not cover this topic. But if it is already off fear not we will get you going.

These old cast iron Briggs are extremely fine engines and will run forever with a bit of maintenance. They are very much worthwhile projects to get going again.
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