1.【 Fitment】This unit is applicable to all V6 4.3L Engines originally equipped with 2-Cylinder Mercarb Mercruiser Boats.2.【 Replace Part Number】Replaces Stock 2 Barrel Mercarb 3310-807764A1.3.【 Material】The carburetor is made of high-quality materials, wear-resistant and durable ...1.【 Fitment】This unit is applicable to all V6 4.3L Engines originally equipped with 2-Cylinder Mercarb Mercruiser Boats.2.【 Replace Part Number】Replaces Stock 2 Barrel Mercarb 3310-807764A1.3.【 Material】The carburetor is made of high-quality materials, wear-resistant and durable, and the foundation bolt type is 3 / 4 x 2 inches.4.【 Function】The carburetor uses the kinetic energy of the intake air flow to realize the atomization of gasoline. Note】This product does not contain instructions.