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possible BS Motor ID help please

L

linster99

Member
This is really a continuation of some thing I posted yesterday but I wanted to start a new post. Sorry I evidently attached the same photos twice. I am trying to ID this engine which may or may not have originally been part of this mower. I am 99% sure that it's Briggs and Stratton under a bradley decal. I can't find any model or series numbers and I wonder if they have worn off or the ID plate was removed. Does anyone recognize this motor and where would the ID numbers be exactly.
a66256.jpg

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It's a Briggs & Stratton engine off a Sears David Bradley two-wheel tractor. There will be an ID tag starting with the # 500. That Sears number can be decoded to find out the exact Briggs #. It's probably a 4 horsepower engine - I assume it's aluminum and not cast iron, correct?

Here's a Sears David Bradley with the same basic engine . .

<a href="http://s104.photobucket.com/albums/m162/jdemaris/?action=view&amp;current=6horsepower.jpg" target="_blank">
6horsepower.jpg" border="0" alt="Photobucket
</a>
 
A 6BH should have a smaller starter-housing with only one bolt hole on top - not two.
 
Definately a B&S- notice the B/S stamped on the shroud? Assuming the shroud hasn't been changed from one motor to another cousin, the model and series should be stamped on the side of the shroud. Parts can be obtained from any Briggs & Stratton dealer and most lawnmower shops.
 
The ID isn't stamped on the shroud when the Briggs is sold by Sears-David Bradley. They use a metal ID tag rivited to the housing instead and it uses a Sears ID # starting with 500.
 
I'm not certain, but I suspect that is a B&S model 142302 or 143302 6hp engine from the 1960's. ...Model & type numbers will vary depending on how engine is equipped.

Later 7hp engines would be model 170402.

It appears to be an aluminum engine, not cast-iron, and I assume the points & condenser are under the flywheel and not mounted externally on the outside of the crankcase.
 
I was kind of thinking the same. That's why I mentioned the Sears-Bradley number starting with 500. The aluminum 140000 series engines (14 cubic inches) are very similar and have the starter housings with two bolts on top. Only odd thing I see is the BS mark on the housing is usually on the bottom left and not the upper right. But many some newer ones came that way?

Sears ID # 500000 to 500499 is a Briggs & Stratton Model 140300 or 140400

Sears ID # 500510 to 500999 is a Briggs & Stratton Model 141300

Sears ID # 501000 to 501499 is a Briggs & Stratton Model 140700

Sears ID # 501501 to 501999 is a Briggs & Stratton Model 141700

Sears ID # 502000 to 502499 is a Briggs & Stratton Model 142300 or 142400

Sears ID # 502510 to 502999 is a Briggs & Stratton Model 143300

Sears ID # 503000 to 503499 is a Briggs & Stratton Model 142700

Sears ID # 503510 to 503999 is a Briggs & Stratton Model 143700
 
Thanks for all the replies. Yes the points are under the flywheel and it has two bolts on top of the shroud. Other than that I guess I'm out of luck because I don't find any markings at all and the ID plate opposite the pull start seems to be missing. Bummer!
 
Just pull the head off and measure the bore with a tape-measure. Good idea anyway to verify the condition of the engine. You can stick the head back on later and you won't need a new head gasket. Then ID for an aluminum engine with points behind the flywheel as thus.

2.375" bore a model 8B/80000/820000
2.5" bore will be a model 100000
2.78" bore a model 110900
2.56" bore a model 130000
2.75" bore a model 140000
3" bore a model 170000/190000
 
I might guess an 8hp brigs. That is what the B/S means on the shroud. A good parts supply store with some old timers should be able to help. By the way you can put a little solid state module on these and by pass the points and condessor. They run VERY nice afterwards. Ebay for maybe $10.00. OSHA would have a cow with your little toy if it was made today! Some of the Gravely stuff I have they would realy scream. You should look up the Gravely chainsaw attacment. Jeffcat
 
I think if you really cleaned it up and checked real close somewhere on that motor there is a B & S seriel number. I found mine underneath the paint. It is stamped in the metal in very small numbers.
 
Get a Briggs & Stratton manual covering engines from the 50 to the 70's, the one I used to have broke down the model numbers by engine size, horsepower, carburetor type and accessories. You'll work backwards id the key features and determine your model number. Either that or take it to someone who knows B&S engines and they'll fix it for you or sell you the right parts.
 
That is the way I will have to do it. I have cleaned and scrubed the entire engine including the bottom and there is not a single mark anywhere. There might be a number inside but I really don't want to take the block apart.
 
I have one almost identical to that on my wood splitter, mines is a 1958 model, 6 horse, and on that one they didnt stamp the numbers on the engine or the shrouds, mine has a engine id tag on it that is held on by two small bolts...according to B&S when i called them for parts on mine is they had to go to their archives to get a parts list and a manual for it..but they got them to me in like three days free of charge...Bob
 
Take the cover off the flywheel & look along the edge of the cover. Your gas tank or air cleaner are hiding the numbers at the moment.
 
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