The original manifold was for use with distillate fuel, therefore the intake runner was surrounded by the exhaust chamber which warmed the incoming fuel/air mixture. The gasoline (cold) manifold isolated the intake runner and so doesn't warm the fuel/air mix as the all-fuel manifold did. If you are using gasoline only, the cold manifold would probably help some, and maybe with the spluttering you mention. The cold manifold came about when Deere offered the horsepower upgrade for G's when 70's came out. Along with the manifold, the block was usually bored .125 over and higher compression aluminum pistons were installed. Original G's were rated at 39 HP, and after the upgrade, many dyno'd over 50 Hp.
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Today's Featured Article - Trailering Your Tractor - by Curtis Von Fange. One of the fun things of summer and fall are the parades and tractor shows that go on across America. Many owners of tractors travel long distances to attend these shows and they usually take their restored iron along with them. Safe trailering practices and inspections will ensure that the event is a fun one. A good habit to develop when using a trailer is to give that �quick look over� before taking it on a trip. Before hooking up to it check the tongue for proper operation. The latche
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