Mercury 50 to 60 4 stroke Conversion

[Seabridge]

I have twin Mercury 50 4 stroke outboards, 1996.<br />I read in this forum that by changing a plastic carb spacer, you can uprate to 60 hp version.<br />Can anyone tell me the part numbers and where to get these 60 hp spacers (I live in Spain) by Mail Order.

 

[WillyBWright]

Re: Mercury 50 to 60 4 stroke Conversion

Welcome to iboats.<br /><br />I know the carburetor throats (at the venturi) are larger on the 50s than the 40s. I'd expect the same of the 60 carbs, but I don't have a catalog to check. Typically there are more differences than that. You might also get a somewhat different version of that motor in Europe than we get here in the States.<br /><br />There are other things to consider. Is the boat rated for 60HP? In parts of the US it is illegal to overpower a boat under 20ft. The boat's structure might not be designed to handle the extra horsepower. I don't know about the law in Spain and I doubt the motor would fall off if it's only rated for 50. In any case, the motor should always be accurately presented. If you make it a 60, please label it a 60.