2005 zx225 top speed?

[jcori3]

Running the Yamaha t25 prop, 1 talon and 1 full tank and full gear with two people. What should my top speed be at 6k rpms?

[SkeeterJohn]

71-72 was what i was hitting in my last boat

[jcori3]

Next time I’m out I will check it. Thanks for the info.

[Randy T]

at 6K 74-75mph, but that combo wont do that as you listed. 70 is respectable, and your rpms should be around 5700.

[jcori3]

So should I not be able to hit 6k all trimmed up then? What is my limit I will hit with that setup? I don’t think I’m getting anywhere close to 70. But I rarely open it up all the way. I know with that motor I need to run it wide open.

[bgibson]

Way too many variables to give any type of accurate answer.

[jcori3]

Took boat out today, gear, two people, empty wells, 1/2 tank of gas. All I could get was 65/66 mph all trimmed up. Motor sounded ok, didn’t cut out or stumble. I checked speed with depth finder and navionics app on cell phone. Any ideas? Is that about right? Think something could be wrong with boat or motor? Thanks.

[Lance B]

Took boat out today, gear, two people, empty wells, 1/2 tank of gas. All I could get was 65/66 mph all trimmed up. Motor sounded ok, didn’t cut out or stumble. I checked speed with depth finder and navionics app on cell phone. Any ideas? Is that about right? Think something could be wrong with boat or motor? Thanks.

I have a 04’ zx225. That sounds about right. I fished a tournament yesterday
25 gallons of gas(1/2 tanks) water temp 58 degrees empty wells 67.1. 2 people I weigh
175 my partner 190 or so. Full gear.

[bgibson]

Took boat out today, gear, two people, empty wells, 1/2 tank of gas. All I could get was 65/66 mph all trimmed up. Motor sounded ok, didn’t cut out or stumble. I checked speed with depth finder and navionics app on cell phone. Any ideas? Is that about right? Think something could be wrong with boat or motor? Thanks.

What where your rpm's?

[jcori3]

5600/5700, just under 6k. Never hit 6k.

[jcori3]

My motor is a 2005, was told I couldn’t get the Yamaha cable to show engine performance on graph. Running a hds12 gen 3.

[H-D Dad]

Is your engine an ox66 or hpdi. Im not sure when they changed. Mine is 06 hpdi. I have engine data on my hds gen 3.
Good luck

[jcori3]

Mine is an 05 hpdi, was told by dealer that it couldn’t be done.

[utinator]

You either have your jackplate too high, or your prop is trashed. That boat should run 70+ mph.

[jcori3]

Last two times I have been out all I can get out of it is 65-66, maybe 67 per gps.

[utinator]

Well, you're not far off. A jackplate adjustment might help a little, but the rest will have to come from the prop. If your prop is stock, you could possibly pick-up another 2-3 mph from a good balance & blueprint.

[jcori3]

When I go to adjust jackplate do I need to go up or down after I mark the original location of it as a baseline?

[tzx200]

the splits in the plates should be a dollar bill width or 2 3/8"

[utinator]

I had to go back and read this thread again to piece together all the facts. I was originally thinking that you were running about 6k rpms @66mph. If I understand correctly, you got up to 66mph @5700 rpms. If that is correct, then I would go up 1/4". If that doesn't help, then go a 1/4" more. I still believe that the prop is the main problem, but small jackplate adjustments could help a little.

[Dug71]

I have the same boat/motor and can only manage 64 @5800 with the stk T1 25 prop. Believe its 2" below pad. Half tank or gas and livewells empty.
Now i do have an extra battery (36v) and heavier trolling motor (ultrex) but thats all shes got. Ive changed every filter on it, even the mystery filters and no change.

I've tried a 26 turbo prop with some added cup and got 64 at 5300 rpm.

Always wondered why it wouldn't do more like others say, but no biggie to me.