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best briggs to rebuild ?


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#1 alec OFFLINE  

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Posted June 18, 2015 - 06:13 PM

I have a knocking 16 hp , a tired 15 hp and a smoking 12 hp . if I could rebuild one which one should it be ? and why ?  all are one cylinder


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#2 classic OFFLINE  

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Posted June 18, 2015 - 06:50 PM

It all depends on how far you want to go with the rebuild. You should measure the bores and crankshaft journals on all three engines to see how worn they are, also.
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#3 DougT ONLINE  

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Posted June 18, 2015 - 07:46 PM

It all depends on how far you want to go with the rebuild. You should measure the bores and crankshaft journals on all three engines to see how worn they are, also.

I have to agree here. I was thinking the one with the least damage before I read this. There are a lot of variable in the question. What are the model numbers of the 15 and 16 HP? Would there be parts that would interchange between the 2 that you might make a good one out of both? You're going to need to tear them down and see what you have and then make the call.


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#4 alec OFFLINE  

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Posted June 19, 2015 - 02:19 AM

I have to agree here. I was thinking the one with the least damage before I read this. There are a lot of variable in the question. What are the model numbers of the 15 and 16 HP? Would there be parts that would interchange between the 2 that you might make a good one out of both? You're going to need to tear them down and see what you have and then make the call.

15hp is 325431 16hp is 326437 . they both run. the 16 runs good but has knocking and slapping . the 15 runs crappy and gets worse as it warms up . I really would rather take them one at a time ( limited space ) there isnt one that is sooo much better than the others ? the twelve ( 300421 ) has three nice vertical grooves in the cylinder wall that looks like someone tried to hone ( cross hatch scratches ) and a really tight exhaust valve . ordered the spring compressor today couldnt believe harbor fright didnt have one


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#5 ACmowerguy OFFLINE  

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Posted June 19, 2015 - 07:50 PM

The 14-16 hp Cast-Iron Briggs engines share the same STD bore diameters. The 12hp pistons are NLA. The 12 can be bored to the same standard bore as the 15 & 16 "32" cubic inch engines. You may need to put a cylinder head from a 14 onto the engine. It could possibly be ported deeper.
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#6 alec OFFLINE  

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Posted June 19, 2015 - 08:09 PM

The 14-16 hp Cast-Iron Briggs engines share the same STD bore diameters. The 12hp pistons are NLA. The 12 can be bored to the same standard bore as the 15 & 16 "32" cubic inch engines. You may need to put a cylinder head from a 14 onto the engine. It could possibly be ported deeper.

12's are NLA ???  whos brilliant idea was that ? :toilethead:   

thanks for the info


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#7 holdenboy1960 OFFLINE  

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Posted June 23, 2015 - 08:09 AM

the 1 with a cast iron bore , there better than the stainless steel bore sleeve type & valves , especially if you have to bore them out over size 

 

stainless bores have been known to warp & mess up some times so normally white or red briggs unless stated on the engines

 

then some black 1's are ok too 

 

just my opinion from personal experience  


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