Mercury Racing 500R – Ready for some serious power? Launched in South Carolina last year, the new Mercury Racing 500R features an all new 4.6L supercharged V8 powerhead and an all new gear case, plus lots more! On display at Boot Dusseldorf for the first time, the engine got lots of attention. As the only UK magazine invited to the global launch of Mercury Racing’s latest high-performance outboard last year, check out our report on this high-revving ‘screamer’ here!