Allison Grand Sport Features: Mercury 150 Four Stroke

A closer look at our Allison Grand Sport boat, with the Mercury 150 four stroke. We also test a 26" Trophy Plus prop that has been customized. The pitch is too low for a top speed run, but a great all around everyday prop for cruising. This boat goes 80 MPH with a 30" Promax prop but the Trophy is a great cruising propeller.

[@BattleBendOutdoors]

Such a beautiful boat

Dream boat right there, though with different power. Great job and very impressive!

[@chadmiller1506]

If you read the article on the 150 4stroke on this hull, it is a great budget setup. 2800 rpm, 40 mph, 10 mpg. Sounds like a winner for cursing around all day on a few bucks.

[@scottstrang8347]

@@chadmiller1506 10 mpg ....wow ....I know some e tec v4 were running 8 ish mpg on Allison bass boat......10 is amazing ! ....my 2.6 L 2 stroke is doing great if I get 4 mpg

[@Bubbles99718]

@@chadmiller1506 Language language

[@joevald3]

Allison has been making great modes for many years

[@jimmycline4778]

They just need medal flake and some colors and they would look a whole lot better!

[@joevald3]

@@jimmycline4778 I disagreeI think they look great just the way they are .Driving one is a pure pleasure

[@melrose9252]

@@jimmycline4778< Are you a Gypsy or just have horrible taste?

[@larrypoeschel6871]

Good job with the video and of course excellent boat. Thanks Larry

[@WavetoWaveBoats]

Thanks Larry

[@mikeprzlomski2092]

Love boating. I’m a die hard bare-footer and slalom skier. Ski Centurion with 225 Yamaha

[@robertjackson7590]

Cool setup, great rig. I'm surprised it doesn't have a ski pylon. Would be a great ski boat with that 4 blade I'd think. Be safe out there.

[@WavetoWaveBoats]

Ya, the ski pole is an option.

[@robertjackson7590]

@@WavetoWaveBoats Ahh be a great ski boat with it, if you ski. Be safe and keep it up.

[@kellymchenry1944]

I’m in love

[@chrisglendinning8899]

A 150 on a grandsport

[@WavetoWaveBoats]

Great engine for it. 80 mph

[@chuckspencer2703]

What lower unit is that?

[@stianlagesen7886]

What is the diameter of the 30" pitch promax propeller?

[@WavetoWaveBoats]

14.5"

[@Joseph-mx2wl]

Is this boat for sale?

[@Unctahdew]

That boat has 2 more strokes than it should ;)

[@Bubbles99718]

If u need wifey approval tell he it has more strokes, they like that

[@melrose9252]

4 Strokes are so much better than the old 2 Strokes.

[@Unctahdew]

@@melrose9252 in most ways they are yes…but…. That’s like saying the new formula one car engines are better than the old v12’s.

[@terryscogins5575]

Exactly 💯

[@terryscogins5575]

@@melrose9252bs

[@Bubbles99718]

Sorry if I missed it but what year is this?

[@WavetoWaveBoats]

The video and the boat are 2019. The year right now is 2022

[@Bubbles99718]

@@WavetoWaveBoats:). Meant the boat. Wasn't sure if they still made that model

[@Bubbles99718]

Need calmer water it seems? You don't mind sitting on the floor?

[@WavetoWaveBoats]

No, this boat is great in reasonably rough water. Seats are incredibly comfortable, the floor drops in front of the seats for lots of leg room. Truly one of the best sport boats ever designed.

[@Bubbles99718]

@@WavetoWaveBoats It's a looker, definitely give it that. And by all accounts a speed demon. Nice combo that. Been in boats that ride rough and it's no picnic. Usually speed demons give up a softer ride for that demon speed. Kool beans

[@dwainegreen]

Panda style gauges look the business.

[@WavetoWaveBoats]

Thanks Dwaine, anything Panda related I'm into, including bears.

[@dmitri6129]

Лодочка класссс! Красавица

[@ПавелПавлов-е3э]

Афигентус аппарат!

[@edwardabrahamiii3742]

Should of got the mercury pro xs is little bit faster about 10mph faster proped right

[@WavetoWaveBoats]

No, the regular 150 is a little faster because of the gear ratio. The ProXS would need taller gears, and would be slightly faster then. Not 10 MPH though, lol. It wasn't available when we did this project.

[@melrose9252]

You get 200 more RPM and a little lower gear. Maybe a couple of mph but not 10.

[@jimmycline4778]

Underpowered! My buddies 21ft Allison bass boat was rated for 150hp, he had a 280 hp merc racing engine with racing lower end, 115, how you going to go 115mph with a 150hp! My point!

[@WavetoWaveBoats]

Your buddies is underpowered too. If it doesn't break the sound barrier, it's underpowered. 😂

[@jimmycline4778]

Wave to Wave Agree! 😂

[@SuperWaterskiboy]

boat runs 80mph and is fuel efficient as could be. idk what more you could ask for.

[@ricksnowden8408]

Never perform like that with a 150 yammie lawn mower motor

[@Bubbles99718]

:) Good luck with insurance...

[@Snailpowerdford]

That’s not a trophy, That’s a promax

[@WavetoWaveBoats]

Definitely a Trophy 👍

[@MajTom-wd2yt]

Now 'yer talk'n....but I LOVE our 'obsolete' 200xs i.imgur.com/SiXZ5DW.jpg?2

[@tbear68-]

Very nice lines. Way. Why are people talking about fuel efficiency??? This one isnt for you. And yes, WAY under powered. Needs the new V8 300r. Tie between this and a Liberator. Nice vid. 🚤🌴 🌞

[@WavetoWaveBoats]

Fast boats are efficient, so it's interesting to note how efficient they are, especially with new engines. And 80+ MPH, definitely not under powered. The 300R is too heavy for this boat.

[@tbear68-]

@@WavetoWaveBoats huh...well, I might have stumbled into the wrong party. I took a look because I'm familiar with Allison brand and I like 19 to 24' speedboats. Where we float no one complains about the frequency of gassing up, and 80 mph is underpowered when everyone else is doing 110. I wish Allison would make a hull that could handle a 600lb clamp-on. There's a decent size list of those who do. Thanks for sharing the vids, anything speed on the water is a good watch. Peace ✌

[@WavetoWaveBoats]

@@tbear68- Thanks. Ya, nobody is complaining, it's just a benefit of having an efficient boat.

[@thomasdamiano8260]

I would put a older 2.5 280 or even a 2.6 Yamaha stage 3. And I know a guy that had a 22 or 23 grand sport that flew through lake Os chop over 100 with a 300x. My father owned a 20xd bullet with a 300x with a blue printed pad went over 108 and it did 90 with a 225x then he got a heavier stroker that still goes 107 with same old 300x

[@WavetoWaveBoats]

@@thomasdamiano8260 Nah, that's old tech. I love the new tech. Runs great with the 150.

[@chrisglendinning8899]

Geossly underpowered that hull needs min 275

[@WavetoWaveBoats]

Lol. No, there are no lightweight high power engines for it currently made. The 150 is great on it.

[@jeremybarrilleaux7309]

Take that motor off and put it on a smaller boat. Replace it with a 280!!

[@WavetoWaveBoats]

No, the whole point was to see how efficient the 150 could be. We got it to 80 MPH and 10 MPG.

[@jeremybarrilleaux7309]

@@WavetoWaveBoats oh ok. I love the boat. I'm going on my 4th Allison here shortly. Looking for an xb2002 or XB2003 again.

[@jimmycline4778]

I have a Ranger with a 150 Optimax with only 30hrs, I’m the only owner , I also have a Bullet with 225XS sportsmaster lower unit does 85, BUT that’s got to be the ugliest Mercury 150 ever made, my 06 150 2 stroke looks way better than this motor! I would hate to have a awesome Alison with a ugly underpowered motor on it!

[@WavetoWaveBoats]

It's a great motor. Why is your Bullet so slow? This ugly 150 does 80 MPH.

[@jeanhaney2203]

I would take on any allison and.smoke em even the 225s with my bullet modded 200 that 21 10 hull always handled Any kind of water very well esp high speed the allison hull is more touchy At higher speeds abobe 80 have to balance ot loke a bicycle i ran a 27 four blade prop and could get over 6k rpms

[@jeanhaney2203]

I modded my 200 on a.21 10 bullet those allisons with a 225 could not.take it always past them with ease

[@melrose9252]

jimmycline4778 .< I suspect he has no just at all but a vivid imagination.

[@melrose9252]

You have a nice rig. It’s hard to beat those Mercs and Allisons. The four strokes are awesome.