i am rebuilding an old electric outboard boat iv had for a while and am thinking of using a special outboard kit for nitro engines, but i also can use it for my vxl system which would be better overall? i have an os 15 marine and also a 3.3 that both can fit im looking to get at least 35 mph out of it.

The trick is to find a good lower unti that will fit the nitro engines. The only ones that I've seen that work were custom made from K&B .21 lowers. The one that comes with the boats off eBay have no life, a couple of runs and they're shot.