Author Topic: 12 hp briggs parts swap (Read 13002 times)

mowmanscott · « **on:** July 16, 2006, 08:40:16 pm »

I got a 14.5 OHV Briggs model# 287707 are the rods interchangable if so what are the advanages and are the crank and pistion also interchangable also. thanks Scott

Mowindown · « **Reply #1 on:** July 16, 2006, 09:49:41 pm »

Scott I have seen on other post on here that most all in the 14.5 OHV briggs engine will fit in the 12hp flat head as long as the 14.5 isnt a INTEK. The rod crank piston and and cam will fit. The rod is stronger in the 14.5 and it will fit the crank of the 12 hp so you can use the crank in the 12 or the 14.5. Just us the 14.5 piston with the 14.5 rod. Hope this help.

mowdak1 · « **Reply #2 on:** July 16, 2006, 11:16:19 pm »

Took a bit to find it but... http://www.heymow.com/viewtopic.php?t=927

mowmanscott · « **Reply #3 on:** July 17, 2006, 05:47:27 am »

Thanks guys this helps but, is the cam more of a performanoe cam than the flatty cam and do I get a performance gain when I use the rod and pistion combo?Thanks Scott

mowdak1 · « **Reply #4 on:** July 17, 2006, 09:05:43 am »

As George indicated in the other thread.... all stock replacement parts, the rod's a little tougher is the only difference... no performance gain.

George Herrin · « **Reply #5 on:** July 17, 2006, 02:24:56 pm »

cams between a flattie and ohv are NOT interchangeable!!!!!

mowmanscott · « **Reply #6 on:** July 18, 2006, 05:23:27 am »

So the 28 OHC and the 29 flatty rod & pistion swap. could I get the parts# for the rod and pistion . Are the rings the same also? Thanks Scott

George Herrin · « **Reply #7 on:** July 18, 2006, 07:14:07 am »

ohv rod is 494504s pistons are same depending on year of motor. some have wider rings than others.

mowmanscott · « **Reply #8 on:** July 18, 2006, 07:30:20 am »

Thanks George . Rocky said to use the pistion with the rod can you give me a starting point for part nos.? my rod was bad and the pistion well not shure. also is the oil splasher and fly wheel inerchangable. Thanks Scott

George Herrin · « **Reply #9 on:** July 18, 2006, 09:19:03 am »

Rod #494504s and piston number is 696397 these are ohv parts that we used in the faltties using the stock crank. if not using the billet rods. And again everything internal is interchangeable EXCEPT the cams!!!! And flywheels are interchangeable.

mowmanscott · « **Reply #10 on:** July 18, 2006, 07:51:25 pm »

Thanks George. also I noticed the lifters are not the same.

George Herrin · « **Reply #11 on:** July 18, 2006, 09:34:01 pm »

Yea ok you got me I forgot to say the lifters are not the same either. :shock:

matt25001149 · « **Reply #12 on:** July 18, 2006, 09:41:25 pm »

ok so wut is diffrent about the cams

mowdak1 · « **Reply #13 on:** July 18, 2006, 09:56:14 pm »

Amongst other things, the lobes are positioned differently to accomodate location of the valve train on the OHV.

George Herrin · « **Reply #14 on:** July 18, 2006, 10:52:10 pm »

Intake and exhaust lobes are reversed

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Author Topic: 12 hp briggs parts swap (Read 13002 times)