Are the ford 302 for a car and boat motor same?

No, Ford 302 automotive engines and Ford marine 302 engines are not the same, although they share a common ancestor. While they may look similar externally, there are significant internal differences designed to handle the different operating environments. Marine engines are designed to withstand corrosion from saltwater, operate at higher temperatures, and handle the different stresses of a boat's motion. Key differences often include:

* Corrosion resistance: Marine engines utilize corrosion-resistant materials and coatings throughout, including the block, heads, and components. Automotive engines are not typically treated to the same level of corrosion protection.

* Cooling system: Marine engines often use a raw-water cooling system, drawing water directly from the surrounding body of water for cooling. Automotive engines use a closed-loop cooling system with antifreeze.

* Ignition system: Marine ignition systems are often designed for more robust performance in a damp environment.

* Exhaust system: Marine exhaust systems are designed to discharge overboard, while automotive exhaust systems are designed to route exhaust gases through mufflers and tailpipes.

* Accessories: The accessory drive systems (alternator, power steering pump, etc.) may differ based on boat-specific needs.

In short, while a "302" designation might be used for both, they are distinct engines engineered for their respective applications. Using an automotive 302 in a boat is extremely ill-advised and dangerous.