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Identifying old briggs and stratton

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jkeys0218
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2018/08/09 18:42:32 (permalink)
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Identifying old briggs and stratton

I have a 12.5 hp twin and cant find the model number. I've seen the information on jacks site about finding it but no luck. I cant find any numbers anywhere. If they were on some shielding or something like that they may be gone. I got the motor from a guy that had it in a gocart and he got it off craigslist. He thinks it came out of a snapper riding mower. Any way to identify it and get a model number so i can buy some parts?

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    Roy
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    Re: Identifying old briggs and stratton 2018/08/09 21:18:17 (permalink)
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    If it is a v-twin the numbers will be stamped into a valve cover. The L head numbers should be on a cylinder head shroud. Can you post a picture or two?
    post edited by Roy - 2018/08/09 23:22:02
    jkeys0218
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    Re: Identifying old briggs and stratton 2018/08/09 23:39:38 (permalink)
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    I reinspected each valve cover neither ave anything on them.  Also this is an old engine not overhead valves, older style where the tappet directly hits the valve. Its an opposed twin not a v twin.
     
    Eddit: Ill post some pictures tomorrow
    post edited by jkeys0218 - 2018/08/09 23:42:09
    AVB
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    Re: Identifying old briggs and stratton 2018/08/10 08:30:24 (permalink)
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    Then is not a 12.5 hp but is something between 18.5 to 20.5 hp though I haven't seen the 400000 series.
     
    Here is a list of the possible base engine model numbers. On the heads will be a two digit indicating the starting model number. IE 40, 42, or 46.
     
    Sleeve Bore Models: 400400, 400700, 402400, 402700, 404400, 404700, 422400, 422700, 462700
     
    Aluminum Bore Models: 401400, 401700, 421400, 42170
    post edited by AVB - 2018/08/10 08:35:15
    jkeys0218
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    Re: Identifying old briggs and stratton 2018/08/10 10:45:28 (permalink)
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    Thanks for the numbers I'll do some research when I get off work. What makes you say it can't be 12.5? It says 12.5hp on the label on the cowling around the flywheel.
    AVB
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    Re: Identifying old briggs and stratton 2018/08/10 11:01:42 (permalink)
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    jkeys0218
    Thanks for the numbers I'll do some research when I get off work. What makes you say it can't be 12.5? It says 12.5hp on the label on the cowling around the flywheel.

    As many twin opposed Briggs that I worked on I have never anything labeled under 18.5 gross hp.
    Roy
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    Re: Identifying old briggs and stratton 2018/08/10 11:48:16 (permalink)
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    They were rated at 16 hp when introduced in the mid 70's. A 12.5 would be an ohv single. Soundds like somebody had an extra decal lying around.
    jkeys0218
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    Re: Identifying old briggs and stratton 2018/08/11 00:37:49 (permalink)
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    dropbox.com/s/0d5c89g1bz7if7x/20180810_193908.jpg?dl=0
    dropbox.com/s/s8iomugofv8vx36/20180810_193921.jpg?dl=0
    dropbox.com/s/4y9hrbxvb0psrej/20180810_193935.jpg?dl=0
     
     
    post edited by jkeys0218 - 2018/08/11 00:41:30
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