i just buy this cat and i try to find some info on cougar but i find nothin... it have 502 VI carburetor and i ran a 24 pitch and only make around 68-70 mph i think i can make beter wath prop are you recomande?

what can i do for wake up this sleepy engine i heard intake cam?? i am new in carburetor engine and speedboat

68 to 70 is probably good for that size boat. What RPM are you running at that speed ?

5000 rpm i try a 25 and its to small i try to find a 26 4 palm and a 27 3 palm. what can i upgrade for wake it up a litle bit? the engine have red roller rocker is original?

If you are only turning a 24 to 5000 rpm, I doubt a bigger 25,26 or 27 will run any faster, probably just slower getting on plane. To truly wake it up, I would say add a supercharger.