The best way to fix a broken model is by knowing how those it constructed.
The best way of knowing that is by building the whole thing from the beginning.
I am very happy to enounced that in the last 6 mounts i was looking for a boat model that will satisfy mi needs.
I was looking speedy model that will go fast couldn’t find any boat with low budget that exceeds 40 km/h.

So i came to a conclusion to build my own muscle boat with hi performance

i ordered a 3050 kv brushless motor water cooled  
60A-electronic speed controller water cooled  (ecs)
2800ma 30c  lithium polymer (LIpo)  battery
And put all that stuff in 60 cm deep v hull.
The boat is still in the dry deck In final assembly 
2 weeks from now I will post the results with the final instructions on how to build one in less than 100$ The home made rc boat is better in performance and chipper Then any RC boat in the market with the same performance .