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Yard Pro Gtk-20 Puller?


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#16 baerpath OFFLINE  

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Posted January 17, 2013 - 10:07 PM

Take the Carter carb off and replace it with a #30 Kohler. 20mag has a steel flywheel remove the fins and run it, I'd stay with 4500 rpm using the gov, your talking about a small set of rods.



#17 homebuilder OFFLINE  

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Posted January 17, 2013 - 10:31 PM

Thanks for the advice :) This is kind of just one of those "spare time and beer money" projects. I'm not intending on building it for any specific class of pulling or anything. Mostly one of those things where you find out just how far you can build something before it goes boom, then fix it and make it hotter if that makes sense. By the way, does anybody know if the 20 horse opposed twin uses the same pistons/rods/valves etc at the 10hp single flatty? that would make life way easier for me lol



#18 homebuilder OFFLINE  

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Posted January 20, 2013 - 10:18 PM

Anybody?



#19 skyrydr2 ONLINE  

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Posted January 21, 2013 - 04:39 AM

I don't think so , the twin would have smaller rods and most likely different pin heights in the pistons for the wrist pins.

#20 homebuilder OFFLINE  

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Posted January 21, 2013 - 01:39 PM

I've been having a fairly hard time finding any parts for the magnum twin. Can anybody point me to somewhere online that sells them, or a small engine shop near kemptville ontario that stocks kohler parts? thanks



#21 Dieselcubmike OFFLINE  

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Posted January 21, 2013 - 01:43 PM

I would try ebay or small engine warehouse



#22 homebuilder OFFLINE  

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Posted January 21, 2013 - 01:47 PM

2013-01-17161239_zpsbbab83bf.jpg

Here's after we took .050" off the heads



#23 homebuilder OFFLINE  

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Posted January 21, 2013 - 01:48 PM

2013-01-17144802_zpsded220aa.jpg

Sandblasted and set up in the mill



#24 homebuilder OFFLINE  

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Posted January 21, 2013 - 01:49 PM

2012-04-18200547_zpsa2175122.jpg

There she is!



#25 homebuilder OFFLINE  

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Posted January 21, 2013 - 01:50 PM

I looked on E-Bay... didn't seem to see anything for the twins... lots of parts for the singles though



#26 Dieselcubmike OFFLINE  

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Posted January 21, 2013 - 03:01 PM

Not sure on the twin magnums never messed with those before. Try a local mower repair shop see if they can find anything



#27 1978murray OFFLINE  

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Posted January 23, 2013 - 08:59 AM

with .50 off there heads is there enough valve clearence.  if there is not the vlaves will hit the head and snap off



#28 homebuilder OFFLINE  

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Posted January 31, 2013 - 12:46 PM

I'm not sure if I'm going to have to open the head up around the valves yet or not. The motor is in pieces in the shop here for a bit waiting on gaskets. Was I ever surprised when I opened it! Cylinders were still cross hatched and the bearings are all in almost new spec! 



#29 homebuilder OFFLINE  

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Posted March 11, 2013 - 11:33 AM

So, there was absolutely no chance of me getting that kohler back together and running before the pull. So I stuffed a '94 Polaris 340 in it :D  Wasn't expecting it to work at all, but geared down to keep the motor in it's power band, it pulls like a friggin' freight train. Swapped my stock 23x10.50x12" tires for a set of 26x12x12's off a toro golf course mower. I was seriously surprised at the way it worked. Unfortunately, now I've been bitten by the bug and I'm redesigning it for even more performance!



#30 1978murray OFFLINE  

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Posted March 22, 2013 - 07:49 AM

:wewantpics:






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