Brand new 35 Surface Drive on 18'X54" Surface Drive Boat runs 28.5 stock in deep water. What mods should I do without blowing it up?

Head work,carb,and exhaust .........nothing to it

If you speak to Hoyt at Gatortail, he recommends head work,cam,pushrods,exhaust,carb replacment or he knows how to adjust factory carb. for maxium preformance. I am very happy with my modifications recommended by Hoyt. I replace my carb. and did the rest of the mods he recommended. I increased speed by 6mph and load carrying ability increased alot. Highly recommend!

Your boat will never be fast you have the slowest boat/motor combo out there!!!!!!!!!

I did alot of stuff to increase flow. Got most of the info here (and a lot of questions answered. I reduced the gear ratio to keep it under 4500RPM.

-EVT Stage 1 heads
-Old can style BPS exhaust (good high flow muffler)
-K&N air filter
-Bored out stock intake to combine the chambers and mate to the heads
-Carb spacer
-Thinned throttle shafts- replaced screw/lock washers on throttle/choke plates with low profile button head screws (loctite them in)
-Cut the air intake plate
-Trimmed the fan and removed screen mounting HW
-Replaced the Gov Spring with one from the MB 45
-Valve lash at .005

Intake (Silk did this):


Carb throttle shafts and low profile screws:


Cut out intake plate to improve flow- smoothed out the elbow underneath too:

Fan trimmed- probably minimal gain:


It was a hot motor to start with pushing my heavy boat.

Probably could have kept the stock jets- have 148/150 in it now so not too much different. The MB 45 runs stock jets 142/148. Really need an exhaust gas analyzer to get it perfect.

Good stuff!