Mercury 500 Thunderbolt 50 hp

[Serialization]

I have a mercury 500 thunderbolt 50 hp 1978 i believe
serial number 4963783

I need some info on it. Help please

Thanks Mitch

 

[Laddies]

Re: Mercury 500 Thunderbolt 50 hp

It's a 1978, 4cyl, 44cu.in. ADDI ign system, L78V plugs. The fuel mix is 50 to 1. When asking a question please be a little more specific