8 ft model boat needing surface drive options

Hi,
I have a model boat hull that is 8ft long that needs to go relatively fast (about 3-4 meters per second). I was previously using an arrow shark twin blade drive on it, but the coiled shafts and motors could not handle the loads of the boat. I was looking at either swapping over to outboard engines or waterjets, but I am unsure what a good rc surface drive is for this model or since this is a pretty large model boat if custom parts might be the way to approach this instead. Any advice would be helpful.
Thanks

 

@ILoveBoats1234

Surface drives are not outboards or water jets.

Do you have any pictures of this boat you can post?

 

We absolutely must have pictures or good drawings. 4m/s is 7.8 knots in boatese. Very slow for a planing boat, but extremely fast for a 2.4m displacent boat, so we can't even begin to discuss this meaningfully.

Pictures or drawings. Also power weight, beam etc.

 

Posting appears to have numerical errors in it, most USA posters wouldn't mix 8 ft and 3-4 m, but stay with compatible units of measurements. My guess, simple answer with the very limited simple info that is supplied is to go with stronger drivelines and motors. In the link below, it appears that traditional Outboards might not be compatible because of weight distribution, or might require a bow counterweight for large RC boats,




Consider a search, Google and YouTube are your friends.