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I would swap for a 70 ECU if they had the same valves. I think the F70 is a 16 valve, which means the ECU won't work with it. Yes, they share the same block, but having a different number of valves means the ECUs aren't interchangeable like the F50 and F60 are.

Not sure how your boat is setup, but typically if you add more setback you can run the motor higher. Think about the water coming off the bottom of the boat while on plane. The hull has forced it down and once it clears the rear, it's coming back up to the level of the water around it. Well...

I usually notice how high other boats ride when I'm running right there with them. So I don't think its a speed thing necessarily. I am actually happy with the speed I'm getting with how it's set up now. I really think I've squeezed all the juice I can get without A. Losing weight (my original...

In my experience with this boat it has been the opposite. The higher I can run the motor without cavitation, the faster it goes. Assuming I'm in open water and just going from A to B, I like to find that line where the prop is just about to blow out. That's where I get the most speed. As little...

Just checking behind me occasionally to make sure it's pissing. I plan on adding a cavitation plate from Circle S machine which should help keep water pressure around the prop/water intake. Hopefully that will let me run motor higher and maybe make it plane out easier. They make inserts for your...

Couldn't tell you exactly. I'd say I've got 5-6 inches of freeboard at the transom sitting still. Sits pretty low. Mostly because the 50hp weighs 250lbs and I've added 7 inches of setback. Sure that adds leverage to the rear. If I trim down it rides a bit shallower. That kills my speed...

I've always heard the pad hull rides great, but you need a good bit more than 50hp to really ride on the pad. Makes sense because Xpress boats are pretty heavy when compared to other duck boats (Edge, Havoc, etc.) As far as running shallow in the timber, I've noticed whenever I'm behind Edge...

Have you played around with jack plates and setback? Raising motor up is a great way to gain rpms. Less motor in the water means less drag slowing you down. Just raising mine up a few inches gained me a few mph. Depending on design, some props you can run in ventilating conditions where they're...

Gotta have a tach before you really start playing the prop game. Otherwise you're just shooting in the dark. The original prop was a 12p Powertech Reb3. After raising the motor up about 3 inches with 7" of setback, I was running ~35mph on the rev limiter. I repropped to a 14p YBS clone and that...

Motor is propped appropriately and I switch depending on situation. With the 14p YBS clone I run now it sits at 5900 rpm with me and fishing gear. I've squeezed enough juice out of it with setup that my options for more performance are more HP or less weight.

I've been running a 2017 Xpress 16DBX that I bought about 10 months ago. I've spent plenty of time getting it setup to run how I like it. When I bought it the motor was mounted directly to the transom and was running 31 mph with a 12p ss prop with a Yamaha 50 4 stroke. With 7" of setback with a...