Originally Posted by
Tim Kurcz
Hey Tumbleweed,
The OMC triple carbs come in three venturi sizes 1.125", 1.187", and 1.250". Smaller venturi's will get you stronger bottom end, larger venturi's get you better top end. These carbs all share a 2.375" bolt pattern and may be interchanged at will.
Whatever carb changes you make, you shouldn't EVER quick rev and engine! Spitback can be controlled with velocity my stacks ($175/set includes fasteners and shipping).
Best for you to do some lake testing. Just be sure to monitor plug reads frequently until you get it sorted out.
Tim