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Briggs Flathead / Re: New guy with 40cu oppy wants to upgrade
« Last post by 86turbodsl on Yesterday at 06:13:12 PM »
Look up rods for a 42477.
You cant use vanguard rods their shorter by a lot and crank journal and wrist pin is a lot smaller

Oh, i read a thread where vanguard single rods were really close just too wide journals, needed machined narrower.  and they were all pressure lube.
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Briggs Flathead / Re: New guy with 40cu oppy wants to upgrade
« Last post by PJG56 on Yesterday at 09:50:33 AM »
Look up rods for a 42477.
You cant use vanguard rods their shorter by a lot and crank journal and wrist pin is a lot smaller
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Briggs Flathead / Re: New guy with 40cu oppy wants to upgrade
« Last post by 86turbodsl on May 19, 2019, 04:36:05 PM »
Saw a post about using vanguard rods, would that work?  I think they are all pressure lube.
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Want To Buy / Who Has It? / Wanted 15x8-8 tires
« Last post by hotbeek on May 18, 2019, 12:52:51 PM »
I'm looking for 2 tires 15x8-8.Hoosier, American Racer or other. Do not need to be treaded tires, slicks will work too !
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Briggs Flathead / Re: New guy with 40cu oppy wants to upgrade
« Last post by 86turbodsl on May 18, 2019, 12:41:02 PM »
How do i find out what part number to look for?  I have full pressure lube and would want to keep that.
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Briggs Flathead / Re: New guy with 40cu oppy wants to upgrade
« Last post by PJG56 on May 18, 2019, 10:43:19 AM »
Put a 42 crank and rods in it,or better yet 46 crank and rods..!!
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Briggs Flathead / Re: New guy with 40cu oppy wants to upgrade
« Last post by 86turbodsl on May 18, 2019, 04:52:08 AM »
i was thinking more along the lines of stroker crank/rods, but i don't know what to get.  Are pressure lube cranks rare?  My rods are sketchy, so i need to get new rods anyway.
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Briggs Flathead / Re: New guy with 40cu oppy wants to upgrade
« Last post by Mower Maniac on May 17, 2019, 09:37:32 PM »
you could try advancing the timing, and put a k and filter and velocity stack on it. Also, better exhaust... Less dramatic bends. If that doesn't seem like enough, you could try mild porting on the block.
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Briggs Flathead / New guy with 40cu oppy wants to upgrade
« Last post by 86turbodsl on May 17, 2019, 05:42:42 PM »
New guy here, i have a 12.5hp horizontal opposed twin, i tore it down to fix something else and wanted to get more power and torque out of it while i have it out.  I'm not a racer really, but the mower it's normally in has always seemed underpowered. 

I'm trying to find out what to do to it while i have it apart.  It's a full pressure lubed engine, so i think parts are a little more hard to come by.   I do have access to a full machine shop and want recommendations on what i can do to this thing while its apart. 

Any ideas?  I'm not opposed to mods, but really would prefer not to spend a fortune on it.
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Kohler Engines / Re: 25 hp Kohler parts
« Last post by Dresser210 on May 17, 2019, 10:33:30 AM »
I think I currently one that case mower
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