LenNH said: (quoted from post at 19:22:08 10/31/08)
Some models of this series (10-20, 15-30/22-36) had a third tank, for water. If the engine knocked, you could turn on a little water to
drip in (through the manifold, I think, but am not sure). I guess this cooled things off. Maybe somebody else knows exactly what this did?
That day kinda cured me of my romance with the F-20. Well, not really.
I don't think 10-20s had water injection, but 15/30s [through the 22/36] had the dual tanks [plus starter tank]. The ones I've seen always have an additional float chamber for the water mounted under the fuel carb. A tube leads out of that to a pair of 'injectors' threaded into the top of the intake part of the manifold working from vacuum in the intake. You get the radiator near boiling on gas, switch it to tractor fuel; when the pinging get's loud, open the water valve to bring it back to a slight ping.
Now with a detailed description like that, you'd think I'd done it, but only gas so far for me [so I may be all 'wet' ] as I don't like the thought of rusting out the tank. With tank lining solutions having been quite well proven now though [I assume are effective with water too], I'm tempted to try it someday.
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