Re: Boat Parts? NOT!
Sorry, but you're wrong about that. The fuel pump is for the 170 and is the same as for the 4 cyl pushrod engines. Alternator looks the same, just can't see the screen. Filter looks the same as any other aftermarket housing. I've also seen that paint color on other older engines. Check ebay motors and look at other Volvo parts, you'll see the same thing.
Not sure why Volvo calls the fuel pump "marine". Only difference from the automotive is the second metal diaphram on the top of the pump. If the main diaphram leaks, fuel will still drip out of the weep hole and into the bildge.