A MM 4600 won't run a vehicle that weights as much as an E-Revo, it would get really hot real quick - those motors are made for 10th scale onroads and the lighter offroad rcs. Heaviest I've seen a 4600 be happy in is a CRT.5 and that weighs less than a E-Revo.

A feigao 8 or 9XL would be a better choice for a starter. I ran an 8XL in a FLM extended Emaxx and was always fighting temp probs - feigaos are cheap and they tend to run hot no matter what the gearing. Better choice is a medusa and even better is a neu. I'm running a Techno Neu 1515 1yF now and don't have heat issues. Need a fdr somewhere around 14.4 if weight is about 10lbs.

Mine weighed a little more than 12lbs rtr and I used 16/51.