Edit… 250-350 work just fine. Lighter motor gonna draft more shallow, more hp faster. Mpg not sure.

V is a little deeper on the mag. Xtreme will be a touch skinnier. Mag will be better crossing rough water. Xtreme probably a bit faster with the same motor on each. Both really good boats.

 

Edit… 250-350 work just fine. Lighter motor gonna draft more shallow, more hp faster. Mpg not sure.

V is a little deeper on the mag. Xtreme will be a touch skinnier. Mag will be better crossing rough water. Xtreme probably a bit faster with the same motor on each. Both really good boats.

Thanks great info any ideas how much different the 50 hp would make in speed?

 

Really too many variables to give an accurate answer. Different manufacturers of motors with different props will vary. But info above is accurate. 3-7 mph difference across the board I’m guessing. 60 in a boat is scooting along pretty good. Unless you are tournament fishing, rarely do I ever find the need to go that fast personally.

 

2-3 mph probably. Alot depends on how each is set up.

 

Yamaha 250 and 300 are the same block so you'll get a couple of mph faster out of the 300. I had a 25 Xtreme with a 250 SHO on it. I loved that boat. Top speed with a 250 will run about 54-60 depending on what prop you're running. I could hit 58 in mine.

 

Thanks for several had been telling me go 300 or larger but I am not a tournament player so glad To hear the difference is marginal so if I find one with a 250 I will not discard it as underpowered. For some were telling me I would be very disappointed with either of these boats if I went with a 250.

 

Thanks for several had been telling me go 300 or larger but I am not a tournament player so glad To hear the difference is marginal so if I find one with a 250 I will not discard it as underpowered. For some were telling me I would be very disappointed with either of these boats if I went with a 250.

My 2011 Xtreme (which is for sale btw) will hit 54-56 with a 250 Evinrude propped for speed. I’m running a 21p torque prop right now and getting 48-50. Still plenty fast for what I do.

 

My 2011 Xtreme (which is for sale btw) will hit 54-56 with a 250 Evinrude propped for speed. I’m running a 21p torque prop right now and getting 48-50. Still plenty fast for what I do.

Send me some information about it please. I am just starting to look again for got discouraged the way everything inflated a few years back. Texanx5@yahoo.com

 

The 25 Magnum runs just fine with a 250. It runs just a couple miles an hour slower than the 300. The bigger issue comes in when you get ready to sell it. People buying Magnums want big motors. You can argue that all you want but in the end Magnums with 250s are much harder to sell than Magnums with 300s, 350s and 400s and you probably won't do as well on the resale price either.

If you are buying used and find a used one with a 250 you can probably make a decent deal on it. So I guess that could be good for you as a buyer if you are ok with a 250.

 

I agree most people won't want one with less than a 300 on it when it come time to sell it.

 

I have a 2017 25+ xtreme that has a 250 SHO on the back. just repropped w higher pitch. she handles whatever Arkansas bay has to throw at her. loaded she runs top speed 53-55. before new prop she ran upper 50's. right now at 3500 rpms she runs 35 mph, getting about 3.5 miles/gallon... one thing no ones mentioned about a 300 or higher is the cost of insurance. mine would be close to $400 more if I had a 300+. if you're buying a haynie it's my understanding that you really have to power with Mercurys, that's what they are built to carry and that's their service model. got a bud who just got a 24 HO with the 300 mere on the back.... his second; first had a 250 mere 2 stroke. both were beasts but the 300 runs like it stole something. would consider that as my next boat - not that the 25 xtreme isn't a bad *** boat. closing, I was on a 25 magnum last summer - it had a 350 merc simply bc it needs it. it is a big and heavy boat. friend had it for less than a year. it was big and wasn't that shallow - went to a big haynie cat.

lastly on selling.... the only buyers who gonna ***** about underpowered are younger folks who think they must have the power to run high 50's into 60, but rarely do. if I wanted to sell my xtreme with the 250 sho I don't think I'd have any problems.

compare the 25 mag with the 24 HO instead. love whatever you get and she will love you back.

 

I have a 2017 25+ xtreme that has a 250 SHO on the back. just repropped w higher pitch. she handles whatever Arkansas bay has to throw at her. loaded she runs top speed 53-55. before new prop she ran upper 50's. right now at 3500 rpms she runs 35 mph, getting about 3.5 miles/gallon... one thing no ones mentioned about a 300 or higher is the cost of insurance. mine would be close to $400 more if I had a 300+. if you're buying a haynie it's my understanding that you really have to power with Mercurys, that's what they are built to carry and that's their service model. got a bud who just got a 24 HO with the 300 mere on the back.... his second; first had a 250 mere 2 stroke. both were beasts but the 300 runs like it stole something. would consider that as my next boat - not that the 25 xtreme isn't a bad *** boat. closing, I was on a 25 magnum last summer - it had a 350 merc simply bc it needs it. it is a big and heavy boat. friend had it for less than a year. it was big and wasn't that shallow - went to a big haynie cat.

lastly on selling.... the only buyers who gonna * about underpowered are younger folks who think they must have the power to run high 50's into 60, but rarely do. if I wanted to sell my xtreme with the 250 sho I don't think I'd have any problems.

compare the 25 mag with the 24 HO instead. love whatever you get and she will love you back.

Cruising at 50, ripping through the chop at 4800 rpm isn’t just a young guy thing.

I have a 350 on my magnum and wouldn’t have one with less than a 350 unless I was only guiding out of it.

 

Here’s a good one for sale with a 250 SHO on it.

2019 Majek Boats Xtreme 25' CON20K819 | Rockport Marine, Inc.

Rockport Marine, INC. is a Yamaha, Yellowfin, Evinrude, Mowdy, Maverick and El Pescador dealer for new and used boats, as well as engines, services and financing in Rockport, Texas and near Fulton, Port Aransas, Aransas Pass, Corpus Christi, Rockport and Ingleside .

www.rockportmarineinc.com

 

the thing I like about having a little extra horsepower is she will burn less fuel half cocked than a smaller engine running wide-open then the extra speed is there if you want it.
If a boat is rated for a 150 I want a 150 if it's rated for 300 I want a 300. it's true you can run as much horsepower as you want but if the tag says 300 and your financing it then you can't get it insured with bigger engine than its rated for. Oh, and the coast guard will absolutely write a ticket for a boat that is overloaded. I think Majek rates their 25Xtreme for 300 max hp but the Haynie's most likely are unlimited to get around the insurance thing. That's why you don't see many Xtremes with 400R's

 

Keep checking around. You can absolutely get insurance. My last five boats didn't even have a rating plate.... insurance company didn't ask.
They can write you a ticket for unsafe operation. But not for head count as long as you have life jackets for each.
Most of the modern 300s are on same block as 250 for example. The power mapping is identical UNTIL you get to full throttle. Often times they make that extra HP with a lil more RPM range on the top end. The 250 might go to 5800 and the 300 might go to 6300 for example. But mid range will have the identical mapping. So where the better fuel mileage at midrange used to be true a decade or so back that doesn't hold anymore. It is only different at the extreme top end of the throttle range. So your fuel burn at 4000 RPM will be the same.

 

The old rule of thumb has long been if the boat is financed you must carry insurance. the insurance would not insure a boat with more hp than the manufacture suggested to be max hp. Some of the boat builders have gone to unlimited hp rating to allow the bigger engines. it may be that the insurance companies don't even ask anymore but that's how it used to be.
The 200, 250 and 300 ProXS have the same rpms. The 300R has higher rpm and different intake runners to support it. the fuel and spark mapping is different throughout the rpm range not just at wide open throttle. Yamaha Sho 200-225-250 same block same rpm, different fuel and spark mapping. I'm more familiar with these engines but im sure Susuki's are similar. At the end of the day the HP and gear ratio is going to determine the optimum prop pitch at wide open throttle. the padded v's such as the Xtreme and Haynie Magnum are going to respond much better to different HP than a cat or tunnel hull.
You may wish you had more hp at times but you will never own a boat and wish it had less hp. just saying....

 

Grem is right on the money with this. The efficiency loss or increase will come from the prop pitch (because that will be top end based).

 

250 and 300 will be the same engine as far as weight and hole shot. 300 will get you a few more mph on the top end. 250 will be cheaper to insure. Once you go 300 the insurance goes up. Also, 250’s have been more dependable. You are squeezing less out of the same engine. This has been my experience. Especially with the lower units. Everyone has been going faster, running more surface props, and getting more rpms however possible. Sometimes dialing it back just a bit and changing fluids twice as often as required is the difference between getting 850 hours and still going strong on one lower, and getting 150 hours out of one and blaming the manufacturer. As stated I speak from experience on this

 

If I keep my Xtreme, it’s gonna get a 250 sho flashed to 325 hp. I think that’s the best bang for the buck…

 

Jealous that I can’t flash my old engine. I looked around and it seems that none of the tuners will touch a Mercury anymore due to legal risks.

 

A new 500R will cure that problem....