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Briggs and Stratton Rebuild


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#1 bbuckler OFFLINE  

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Posted January 27, 2016 - 07:49 PM

I'm going to rebuild my 15hp Briggs and Stratton 325431 0139 01 .This is my first rebuild and I'm going to take the cranks and block to a machine shop to get everything checked and any machine work done that might be needed. Anyone know the spec for the crank ? The manual show it for the cylinder but I couldn't find anything about the crank. 

 

 


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#2 Gtractor ONLINE  

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Posted January 27, 2016 - 10:10 PM

I'll have what Classic is smokin

 

:bs:     :poke:


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#3 classic ONLINE  

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Posted January 27, 2016 - 10:12 PM

HA! I meant to post what was there in another thread. I smoke Camels. Stay away from them...they'll kill ya.
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#4 classic ONLINE  

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Posted January 27, 2016 - 10:25 PM

Gtractor, that story was true and I remember it like it happened yesterday.It happen around 15 years ago since my buddy is 80 now. Now about this Briggs engine...I would measure the crank journal to see if it is worn out of round beyond spec. If it is, just order a .020 rod and turn the crankshaft journal down to where you have between .0015 and .002 clearance between the rod and crank journal. Most of these cast iron blocks can be cleaned up with a .010 overbore unless there is deep scoring. The part number for a .020 rod is 390306 and a .010 piston is part number 390365. Just make sure your piston isn't oversize already.
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#5 bbuckler OFFLINE  

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Posted January 27, 2016 - 11:03 PM

I found a spec chart on here, http://gardentractor...ques-clearance/


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#6 bbuckler OFFLINE  

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Posted January 29, 2016 - 12:40 PM

The oil is coming out like sludge and I changed it a couple months ago. No metal flakes



#7 bbuckler OFFLINE  

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Posted January 29, 2016 - 01:19 PM

How do I tell if the governor needs to replaced?

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#8 WNYTractorTinkerer OFFLINE  

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Posted January 29, 2016 - 01:38 PM

A good rule of thumb is to replace it every time you are inside the engine.  If it fails shortly afterward you'll be sorry you didn't!


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#9 bbuckler OFFLINE  

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Posted January 29, 2016 - 02:20 PM

A good rule of thumb is to replace it every time you are inside the engine.  If it fails shortly afterward you'll be sorry you didn't!

Can the crank be measure without removing it ? It look like it might be a pain to remove.



#10 WNYTractorTinkerer OFFLINE  

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Posted January 29, 2016 - 02:28 PM

Pop the flywheel off and it will slide right out..  If the motor is old I'd check everything to be sure it's OK before I poured $$$$ into it..  But that's just me!


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#11 bbuckler OFFLINE  

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Posted January 29, 2016 - 05:12 PM

Waiting for money but here is my part list so far. 

 

Piston and Rings 

Connecting Rod 

Gasket Set 

Governor 

Exhaust Valve 

Crankcase Breather 

Carb Kit 

Breather Tube. 


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#12 bbuckler OFFLINE  

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Posted January 29, 2016 - 05:34 PM

Does the camshaft need to come out to take out the crankshaft ?



#13 WNYTractorTinkerer OFFLINE  

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Posted January 30, 2016 - 10:34 AM

take the cam and lifters out to gain proper clearance.  Be careful to mark or remember which lifter is in what position.  They have 'mated' with the particular cam lobe they ride on.  Don't mix them up..  



#14 bbuckler OFFLINE  

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Posted January 30, 2016 - 05:39 PM

Got it all tore down today. Had to cut out the out exhaust but other then that it went easy



#15 Bolens 1000 OFFLINE  

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Posted January 30, 2016 - 05:44 PM

If you dont have one already here's a great manual for the Older briggs

 

http://gardentractor...ines-1919-1981/

 

Its available in hard copy from B&S but its about $70


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