Posted by ScottyHOMEy on January 15, 2009 at 11:31:02 from (70.105.226.211):
In Reply to: super a 123 posted by Mark W. on January 15, 2009 at 10:27:45:
Depends what you're trying to do.
If you're thinking that you need the taller radiator and grille to run the 123, you'll also need to find a pair of taller supports for the rear of your gas tank and maybe a new fuel line and fan and/or generator belts.
My own thinking is that you don't need to do that to run a 123. The piston and sleeve kits for 113s are commonly overbore to 3-1/8", effectively making 123s out of them, and they run just fine with the thermosiphon 113 cooling system with its shorter radiator. In that case, to use your existing radiator and grille, you only need to salvage the cooling outlet/fan support from your old 113 to have a straight line for the hose to the radiator. That won't have provision for a thermostat, so it's your choice whether you want to keep the water pump from your 123 or swap the cooling inlet from the 113 in. too. They run fine with or without the pump, but those motors warm up slow enough with just the thermosiphon, that a waterpump with no thermostat will only make that worse.
It's your tractor, and you won't hurt it any with the taller radiator, but you already have the parts in hand (I'm assuming you still have the 113) to have her up and running. I'd go that route. If, down the road, it isnt' working for you, you can upgrade the radiator, grille and other parts, but I'd think you'd have to really work the livin' bejeezus out of it for the old cooling system to be inadequate.
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