Expanded MAX5 Propeller Offerings

Mercury Racing Propeller Manager Scott Reichow and Propeller Specialist and  Project Manager Nick Petersen  review  our expanded MAX5 propeller offerings.

New 15.25-inch-diameter MAX5 models offer 3-4 percent reduction in slip compared to the 15.00-inch models on select outboard and sterndrive applications that benefit from elevated transom heights.

The Mercury Racing MAX5 propeller, developed and handcrafted by Mercury Racing Propeller artisans, is designed for single- and multiple-engine applications, including the 400R outboard and the 600 SCi sterndrive. The Lab Finished MAX5 provides a measurable reduction in propeller slip (up to 12 percent). In fact, the MAX5 prop is so efficient builders are finding they can run it higher to take full advantage of engines fitted with the race-proven Sport Master gearcase.

Bigger is Better

New 15.25-inch-diameter MAX5 models offer 3-4 percent reduction in slip compared to the 15.00-inch models on select outboard and sterndrive applications that benefit from elevated transom heights. Half-inch pitch offerings enable engines to be dialed-in to their maximum rpm operating range for enhanced throttle response, optimized cruise fuel efficiency and optimal top speed.


The shortened exhaust barrel enhances the performance of single-engine bass boats and twin-engine catamarans by keeping the stern planted for a confidence-inspired ride, while the large 15.25-inch-diameter prop stays hooked up at extreme engine heights.

The new Mercury Racing MAX5 ST propeller is designed for the 4.6L V8 300R FourStroke outboard with Sport Master gearcase. The shortened exhaust barrel enhances the performance of single-engine bass boats and twin-engine catamarans by keeping the stern planted for a confidence-inspired ride, while the large 15.25-inch-diameter prop stays hooked up at extreme engine heights.

Initial test results are promising. A 300R FourStroke spinning a 31-inch pitch MAX5 ST prop powered a tournament-loaded Bullet 21 XRS bass boat to 97.5 mph with a mere 7 percent slip!

A 300R FourStroke spinning a 31-inch pitch MAX5 ST powered this tournament-loaded Bullet 21 XRS bass boat to 97.5 mph with a mere 7 percent slip!

All MAX5 propellers feature the Mercury-patented Performance Vent System® (PVS), which enables the user to fine-tune the amount of venting needed for quick planing.


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33 thoughts on “Expanded MAX5 Propeller Offerings”

  1. Looking at trying the Max5 st. I have a 21 foot Blazer bass boat with a 300xs stroker. I can turn my 31 bravo Xs around 6100. What pitch would I need in the new max 5 st. I have a 1.75 sport master do you recommend this prop for my application. Thanks.

    1. Jared,
      Having your speed will help us to understand if the 31″ pitch Bravo I XS would be the prop of choice. The Max 5 works great with the big Sport Master, it just might be to much prop for the smaller Sport Master.

      1. Scott,
        I can fish with a tournament load 87 mph. I also run from time to time a 28 promax. Turn the 28 promax and the 31 bravo 1xs the same rpms. The promax prop i have is stiff. Just wondering what pitch in the 5 blade I would run, and would you recommend it. I like the fact of the reduced slip.

        1. Jared,

          You are pretty close with the Bravo I XS. What is your measurement from prop shaft to boat bottom? The MAX5 ST works so well on the 300R Sport Master because it needs to be elevated higher due to the larger diameter. With your Sport Master, I don’t think you would be able to elevate the MAX5 enough for it to be effective. More blade area would most likely slow you down. The MAX5 really shines when prop shaft height is above boat bottom, give or take depending on setback and hull design.


          1. Nick,

            Thanks. I’ll look at my height when i get to my boat. I feel I can come up in height still with the bravo, at least a half inch. I ordered a Max 5 st form Jaco yesterday in 30 pitch. I want to try it. I think with my setup, i can raise the engine enough to run it. We will see. Only one way to find out right.

  2. I was wondering what max 5 are they running on a 25 Baja outlaw with a 496ho/425 with a bravo out drive and what kind of price they are running for? I haven’t been able to find any info.

    1. Jeff,
      Typically, I would recommend the Bravo I FS geared towards the traditional vee-bottom because the shortened barrel offers great bow lift for 3-blade top end speeds. And we have run the Max 5 on our Baja test boat and loved it. Any authorized Mercury dealer can give you a price; Teague Marine has them in stock.

  3. I have a Charger 210 Elite, 1900lbs and I have a 300r on order. 50 gallon gas tank (usually run half full). Can you recommend a prop and pitch . Loaded boat weight approximately 3300-3500 lbs.
    Looking at Max ST, Bravo, Fury ?

    1. Tim,

      Congrats on the new boat, sounds like it is going to be a rocket. Because we are talking about an application that will be well over 85 mph, the MAX5 will be the prop of choice, but the Bravo I FS is a good and cost effective option. The MAX5 will be more fuel efficient at cruising speed, and have better top due to reduced slip. A ballpark guess at your top speed is 90, to get there you would run a 29.5 pitch MAX5 ST or a 31 pitch Bravo I FS. If you have the ability to test props before you buy, we will be able to dial you in more effectively.

  4. Good afternoon, I have been running a carbon fiber Yellowfin 24ce with hard top tower & a 400r. To date the best running propeller I have seen is the Bravo1 fs 21p and the bravo 1 LT in a 21.5p. Both of these have put me in the 67-68 mph range @6800-6900rpm. I do have to run the engine really high on the jack plate to get to the necessary rpm range. My question is if I wanted to try the max5 ST would you recommend the same pitch as a four blade? I did notice the stern would get a lot of lift on top end with the long tube prop.

    1. Michael,

      Which gear case are you running? We have been doing a lot of testing with captain Steve Lamp of Dream Catcher charters and his 24 Yellowfin carbon edition. The MAX5 was hands down the best performing prop on his 300R, 70+ mph. This was also with a Sport Master gear case, which helped elevate the MAX5 for optimal performance. I think our standard 15″ diameter MAX5, 22.3 pitch is your best bet for increasing top speed and overall handling. That is the lowest we go for pitch in the MAX5 line.

    1. Brad,

      Generally, about 1.5 inches of pitch. It all depends on how close to the limiter you are with the Bravo I FS, and how much room you have to play with engine height. Depending on the hull, you can raise the MAX5 higher than the Bravo I FS and get more RPM out of it while maintaining low slip (watch your water pressure).

  5. I have a Goldfish 36 P1 Supersport RIB, a 3 step hull with 2×380 hp diesels running IMCO SCX with driveshaft slightly above the v-hull bottom. Running Maximus Lab Finish 15 5/8 you end up trowing blades, so I run with 30′ std Maximus 15/5/8. At 4300 rpm it is running at 84 mph, which is perhaps 50 rpm high (-or very much spot on). I have two goals, to reduce the stress on the IMCO drives when running semi surface and to keep the speed and especially the cruising speed when running in the 48-60 mph.

    The new 15.5 diameter Max5 seems ideal for achieving that – what are your thought on behaviour and at what pitch would you suggest

    1. Bjorn,

      The MAX5 will not be more durable than our Maximus, they are both Lab Finished to the same specs. We also only go up to 15.25″ diameter on the MAX5. If the standard Maximus is holding up, I think that’s your best option.


  6. I thought the pointy profile of the Max5 would have less force on the edge of the blades versus the slightly more rounded and double rake of the Maximus. Also the smaller distance of the diameter would together with the diameter would make it easier on the drive when entering the water in a semi surface running height?
    -not that I am disappointed in the Maximus.

    1. Bjorn,

      I think you are benefitting from both the blade geometry and thickness of the standard Maximus. Having the bigger diameter and blade area is giving you more stern lift than the MAX5 would offer. That lift is helping to carry the weight of your engines. Those blades are also quite a bit thicker than the Lab Finish variants, which is why they are holding up to the torque.


  7. I have a 30′ Daytona, stock 525 engines, labbed 30p bravo ones, Imco-1 lowers, 1.25 gears, prop shafts are approx 2″ above bottom of boat. I have seen 98mph on the rev limiters. Would the max5 add top speed and bring the cruise slip down?

    Thank you for the help.


    1. Steve,

      Awesome setup, I think you are a great candidate for the MAX5. You will be in the neighborhood of a 29 pitch. Expect to gain at least 3 mph and greatly improve efficiency at cruise. I recommend calling Bob Teague at Teague Custom Marine- 661-295-7000. He has years of experience setting up Daytonas, and he has MAX5s in stock.


      1. My boat seemed to work the best with the drives up one inch above where they are now. Planing was tough with the B1’s so I dropped the drives down. Do you think a large diameter maximus and raise the drive back up 1 inch would work well?

        Thank you for your help.


        1. Steve,

          Bob Teague will be your best resource for engine height adjustment on your boat. Since you are currently running 17-18% slip, the MAX5 will be the propeller of choice to dramatically reduce your slip for better top end speed and cruising speed efficiency.


  8. i have a 34Z Seavee with triple 300R. Currently running Bravo FS 24″ on outsides and 25″center. I can see when running above 50 mph the center motor is slipping more or i should say loaded less than outsides. I was thinking changing center prop to MAX5 ST 25″….thoughts ?

        1. Michael,

          Thanks for the info, your slip seems to be pretty high. One cause for this could be high engine height. Are you able to measure engine height, going from the AV plate on your motor to the boat bottom? Measure from the boat bottom right in front of the engines. Take both measurements from the ground, on a leveled surface and subtract the difference. Whether it is a prop change or setup change, I think we can help you out.


  9. Nick I should be able to do that later but boat was setup at Lake X by Mercury. After all prop testing and engine height adjustments that was best they could do. Max 5s were not available at the time when boat was there .

    1. Michael,

      I like your original idea of running the MAX5 ST on the center engine, since we know the engine heights have to be close. Consider a 25 pitch MAX5 ST on the center, and if it works, I would think you could run 24 pitch MAX5 ST on the outer engines. Just for reference, you will want your engines to spin right at 6250 RPM wide open.


    1. Louis,

      Congrats on the new boat, the Bullet/300R package is pretty spectacular. The MAX5 ST is the propeller of choice for your setup. Pitch will depend on the load that you are running. We have guys running heavy loads with a 31 pitch around 97 mph, lighter loads run up to a 33 pitch, over 100 mph. The MAX5 ST has been a huge advancement, not only in top speed, but with mid range fuel economy as well. Both can be attributed to greatly reduced slip precentages. Prop shaft will be around 1.5″-1.75″ above the pad on top end. For planing, I believe guys are starting out with the prop shaft around an inch below the pad, and then they work their way up as speed increases.


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