New 1.60:1 Sport Master 300R FourStrokes

We are excited to announce the release of six new 4.6L V8 300R FourStroke outboard models featuring a 1.60:1 gear ratio Sport Master gearcase.

Single and multi-engine applications may realize an improved propeller efficiency with the taller ratio.

Models featuring the Racing CMS (Conventional Midsection) with a cambered Sport Master gearcase are ideal for lightweight – single engine sport boats, bass boats and flats boats. Rear tie-bar, heavy-duty midsection models are designed for high performance catamaran applications.

Single and multi-engine applications may realize an improved propeller efficiency with the taller ratio.

Rear tie-bar, heavy-duty midsection models are designed for high performance catamaran applications.

The new 1.60:1 Sport Master models join our full suite of 300R high performance FourStroke offerings. All 300Rs come with a three-year limited factory warranty with up to five-years of Mercury Product Protection (MPP) available.

The new 1.60:1 300R models are available for order now with shipments beginning in May.

 

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62 thoughts on “New 1.60:1 Sport Master 300R FourStrokes”

    1. You are not the first to inquire about a 15-inch 300R. We are busy fulfilling demand for currently available models.

  1. I have ordered a month ago the 300R at Ellis Marine in Brunswick Ga . Is there any chance in a earlier than later delivery date???? Will this come with 1.60 gear case or the 1.75 . I am going to install this motor on a 21 foot Liberator please respond
    Thanks Donny

    1. Donny,

      As your order stands, it will not have the 1.60 ratio. You can have your dealer contact Mercury Racing Sales and change the gear case option, we are happy to help. Your delivery date is our best estimate at when your motor will be available, we apologize for the long wait. Thank you for the order and congratulations on the upcoming Libertor!

      Nick

    1. Rick,

      At this time, the stand alone gear sets are not availbale for purchase. We do plan on making them available in the future, keep an eye out for an announcement on the Blog!

      Nick

    1. Leon,

      For applications running in excess of 90 mph, the 1.60 ratio offers a much better propeller selection. Think of the 1.75 as essentially limiting top end speed. Some applications are running the highest pitch Bravo and MAX5 propellers that Mercury Racing offers and are still near or on the rev limiters. Switching from the 1.75 to 1.60, guys will step down 2 or 3 inches in propeller pitch to achieve similar RPM. Having the availability to run a 31 or 32 pitch propeller is a lot more appealing than a 34 pitch. This problem is much more apparent on the 300R because the RPM range is limited to 6400, whereas on the 400R it is 7000.

      Nick

      1. Thanks for the reply. I am strapping the 300R onto a 19.2 foot bass boat. I normally run relatively light. What prop would you advise.

        Currently I am running a 225 proxs but I am struggling with bow lift with fury 4 26p ( 5950rpm) I am testing a 25p promax to improve the rpm and bow lift.

        Thanks again

  2. Hi, Very exciting stuff coming from you guys. Thanks! On a 42′ high speed cat, would you recommend the 300R’s with the 1.60 or the 400R’s? It’s a heavier boat and will be running mostly at cruise speed vs top speed and I hear the 300R’s have more torque? I still like to open her up and get that adrenaline rush but just trying to decide which motor to run for best overall performance.

    1. Eric,

      The 300R does pack a big punch in term of low end torque. Between the hot rod sound of the V8, and torque that will throw you back in your seat, the 300R will definitely give you an adrenaline rush. But the 400R is no slouch thanks to the super charger and 7000 RPM rev limited, which allows for a lower pitch prop and awesome acceleration.
      For cruising, it is hard to beat the fuel economy of the 300R, but the 400R will be a few mph faster on top end. It all depends on what you are looking for and how the hull will perform given the weight and horsepower difference bewteen the 300R and 400R. The 400R has the Advanced Mid Section which helps to reduce noise and vibration, and also the integrated hydroelectric steering system. The 300R features a conventional mid section. Both come standard with a 3 year warranty and availability to buy an additional five years.

      Nick

  3. Hi I have a velocity 220 which is a 22-foot performance style boat and I’m currently running a 300xs, with a torque master 1.75 ratio gear ratio 20 inch case. I am running a 25 pitch Trophy plus and at wot am at 76 mph and 6000 rpm.
    Will I gain speed by swapping the 300xs for the 300r in your opinion?
    Thanks, Jeff

    1. Jeff,

      I have yet to see an application that has not picked up speed switching from a 300xs or 300 Verado to a 300R. If you stay with the Torque Master and 25 Trophy, you should see close to 80 mph with the 300R, that prop is hooking up great for you. You will love the fuel economy and bottom end torque of the 300R just as much if not more than the top speed gains.

      Nick

      1. Hi Nick, with my set up would I benefit more from a Sportmaster Drive versus the current TorqueMaster drive that I am running? Also, would it be a benefit to stay with the 1.75 gear ratio or go to a 1.60 gear ratio? The boat tends to chine walk, would switching drives reduce this issue? Also is the 300 R better on fuel than the 300 XS?
        Thanks, Jeff

        1. Jeff,

          You are a pretty unique scenario where I think you can stick with the same prop, same gear case, same engine height, and improve all around performance with the new engine. The Sport Master will not help with chine walk, it will actually decrease performance unless you are running 85+. The only thing I have concerns about is the amount of stress you will be putting on the Trophy, you may need to switch over to the Pro Max propeller for its strength, especially with how much torque the 300R puts out.

          Nick

  4. Nick , I’m curious on the mercury racing, MTI 340X WITH TWIN 300R’S . what’s the top speed of that setup ? I’m looking into a cat package like that !!!!

    1. Mark,

      With a light load, the top speed was 113 mph. It is also the lighter carbon version of the 340X. It is an awesome boat!

      Nick

  5. I have a 300 v8 with sport master I repowered from a 250 optimax with a rev 4 23 pitch ,,, I used same prop on v8 and I dropped 5 miles and hole shot is really bad ,,, I also can only turn the rev 4 at 5400 rpm when I was turning it at 6000 with the 250 opti ,,,, and sugestions on prop size and model

    1. Ruben,

      It sounds like you have the incorrect gear case for your application. The Sport Master should only be equipped on 80+ mph applications. For example, we know that a 65 mph bass boat that normally runs a Torque Master II gear case will lose 4 to 5 when equipped with a Sport Master. This is due to the shape and larger size of the Sport Master, it is not designed to run submerged- it must be run at the surface at high speeds to be efficient.

      Nick

  6. Nick,
    I am awaiting delivery of a 300R with a 1.60 Sportmaster to Liberator in Texas for my new 21 ft. cat. They originally ordered and received a 300R with a 1.75 case but we immediately re-ordered a new 1.60 combo as soon as it was announced in April. Liberator has tried many times but has not been able to confirm a shipment date. Concerned that we may lose the entire summer waiting on our motor. Can you help expedite delivery?

    1. Dennis,

      Which dealer did Liberator order the engine through? To my knowledge, they do not order anything direct.

      Nick

      1. Nick,

        Thanks for the quick response! I’ll get the dealer info and get back to you as soon as I can.

        Thanks!

        Dennis

        1. Dennis,

          No problem. The dealer will have to call Mercury Racing sales for an update and ETA. Hope you enjoy the new engine!

          Nick

          1. Nick,

            The Mercury dealer is Wayne’s Marine in Lake City, Florida. Is there anything you can do to help?

            Thanks much in advance,

            Dennis

          2. Dennis,

            Wayne will need to call and ask for an ETA on your specific engine. He has a lot of them on order, all coming at different times.

            Nick

  7. Nick,

    Thanks much for your help nailing down the 300R delivery for me. Now that any hope of having our new boat for this boating season has evaporated, I am considering taking the opportunity to upgrade to the 450R. I know this is a lot more power than we’re going to “need” for our 21 ft. Liberator but am thinking this engine may actually be more versatile than the 300R for our intended use. We want this to be an all-purpose boat good for slow speed skiing and tubing, a good cruiser for sight seeing, going out to dinner, etc. as well as a high speed toy!

    Based on on some simple calculations, it appears that the 450R has the power to push this light tunnel hull to around 140 mph but the current Mercury prop selections don’t support that. A 37″ cleaver on this motor would only be good for around 135 mph and a 34″ Max 5 would only get to about 121 mph. The motor would be topping out on the rev limiter with either of these props.

    So, I have a few questions…

    I know cleavers, in general, are poor for hole shots but great for high speed. Our boat will have a hydraulic jack plate. If we keep the cleaver buried for slow speed operation, will it then provide a decent hole shot and low speed manners for skiing and tubing?

    How well would a Max 5 prop work on a tunnel hull that’s made to run flat? Are there any plans to offer a higher pitch, say 36″, for the Max 5?

    Does Mercury have a prop loaner program to aid final selection?

    Thanks!

    Dennis Derr

    1. Dennis,

      I think the 300R will be the better option for you. 21 Liberators are going 110-112 with this power. It will have more than enough torque to pull as many skiers and tubers as you like. Randy from Liberator boats of Florida is putting a 450R on a 22 Liberator. He is going for big numbers, if you are looking for general all around use, the 300R is a great choice. I am not sure how stable that hull is at 130+ mph.

      Nick

      1. Nick,

        Thanks for your thoughts on the 450R. Yes, I am looking forward to seeing Randy’s results!

        Dennis Derr

  8. I am looking at a Tuff Marine 24 setup with a new 300R. They have currently used the HD version with the 1.75 gears. I would like the same HD setup with the 1.60 gears. Notice it is only offered with the rear tie bar config. Is there a rear plate option for a single engine side steer?

    1. Brent,

      Yes the model name is “Sport Master 1.75 L RH Heavy Duty Rear Tie Bar Camber RH Side Steer”. End model code is 205A for the DTS model. That is the starboard side wing plate model, it will still have a mount on the back for a tie bar that you would not use. We do not offer a cambered skeg model with 1.60 gears and side steer at this time. The 1.75 gears will be sufficient on a 24 foot single outboard, the 1.60 gears really aren’t needed until you start getting into the 95+ mph range and run out of prop pitch.

      Nick

      1. Thank you for the info Nick. They are currently at 99 mph on the rev limiter with the 1.75 gears. I am not sure which prop they are using. I am very satisfied with those numbers so I may stay with the 1.75 gears. My thoughts were to prop the boat as a 100 mph boat using the 1:60 gears but have the flexibility to broaden my options if I wanted to get more out of it. The torque was immense with the 1.75 gears and I could probably have a lot of fun with just that aspect. Wasn’t sure if there would be a compromise by going with a 1:60 with a lower pitch prop.

        1. Brent,

          It sounds like they have it dialed in. We currently offer up to 34 pitch in the MAX5 ST, more than enough prop to get over 100 mph with 1.75 gears. There is a cat running twin 300Rs with 34 MAX5 ST propellers at 108 mph with 1.75 gears for example.

          Nick

          1. I am confident now that the 1:75 gears are the way to go. Thank you for the assistance and feedback.

  9. Nick Wanting to put a 300r on an El Pescador cat fishing boat . Boat runs 67-69 with a G2 250 weight is aprox 1500 lbs.. Any prop info on the 300 ? the g2 likes 22/24 .

    1. Charles,

      Cool boat, looks similar to a Simmons. They are typically running the Pro Max and Bravo I FS. It is hard to make a guess on pitch, somewhere in the 26-27 range.

      Nick

  10. I have a 115 pro xs 4 stroke on my 180 Pioneer Islander. It came with a 22 pitch Enertia prop. Could not get it to spin more than 5900. So I swapped it for a 21. Cant get it over 6000. It seems to me that the last 1/4 of throttle is dead. I can push it all the way down but nothing happens after 3/4. It seems to me I’m leaving hp on the table. Otherwise the motor runs great. Although sometimes the neutral switch guve me fits trying to start. I have to wiggle the lever and it starts.

    1. Gary,

      On the propeller side of the equation, stepping down one inch of pitch and gaining around 100 RPM is acceptable. For your throttle, you can make sure that it is not hitting the throttle stop too early in the stroke.

      Nick

  11. Thanks for the response. I was just thinking that I should be hitting 6300 with the 21 pitch. And 6100 to 6200 with a 22. Where is the throttle stop? Is this a cable adjustment issue? Also where is the neutral safety switch located? I dont want to take the control apart unless I have to. Again, thanks for answering my dumb questions. The dealer I bought the boat from is a Yamaha dealer. So I’m doing my own service.

    1. Gary,

      Your best bet is to call the Mercury support line at 920-929-5040. They will be able to walk you through all of the details of your engine.

      Nick

  12. just had new 300R installed on 21 Trick Tunnel hull with promax 30.
    the motor is powerful as advertised but the sportmasterHD was delivered with out camber on skeg and twist boat like a cork screw.
    dealer is looking into error.
    can camber be added without effecting warranty?

    1. Eduardo,

      The 215A comes with the standard midsection and 1.60 ratio. If you want the heavy duty (single ram) mid section, you have two options. 143A is the 1.75 ratio heavy duty midsection. 216A is the 1.60 ratio heavy duty midsection and has the side steer wing plate. The thought process is that if you need both the heavy duty midsection and the 1.60 gears, you should use the hydraulic side steering with the wing plate for optimal strength.

      99% of all single engine applications over 80mph are running the 215A- Bullet, Liberator, Allison, etc.

      Nick

    1. Eduardo,

      216A does not have camber. The model code that racers have used so far for a boat similar to yours is 205A. That is a heavy duty midsection, side steer, cambered skeg, 1.75 ratio, and has DTS equipped.

      Nick

          1. Eduardo,

            93A is the only model offered in the 250R. It is a 1.75 gear ratio cambered Sport Master, with standard mid section.

            Nick

  13. i put the new 30 ProMax R on the 300R on my 21 Trick.
    then went to run it awhile but had to wrestle it out of the water.
    then plugged the prop holes and put slip ring around prop, this helped but still a fight to get it going
    any suggestions on prop would be very helpful

    1. Stanley,

      Sounds like an awesome setup. If you can get your hands on a 31 or 32 pitch Bravo I FS, that would be a great place to start. The extra diameter will help with hole shot. I have not heard any data on similar setups yet, unsure on whether a MAX5 ST would work or give you too much stern lift.

      Nick

      1. what do you think about the 5 blade CNC randy ran on the liberator,
        its a similar hull and weight
        it looked perfect for hole shot and top end

        1. Stanley,

          There really is no substitute for the Outboard CNC if you are willing to spend the money. He ran a 15×34 15 degree rake I believe. Hole shot is very good, small cavitation, but the slip stays low through the entire RPM range for increased speed, fuel economy, and responsiveness.

          Nick

  14. Hi,

    Looking to replace my 300X motors on my 32 Skater and move back into digital controls. Boat is a twin engine application, light layup with a very deep/mid width tunnel, stepped hull, notched transom, jack plates and Through hull water pickups. The boat runs for an outboard of its size. 300X motors propped with 32″ pitch (14.75 inch) B blades the boat runs 107. It can handle more pitch and will run 110 but it sacrifices too much down low. Any thoughts between 300R and 400R? Thanks a lot.

    Shaun

    1. Shaun,

      It sounds like CG balance would be a lot happier with the 300Rs, coming in about 150 pounds lighter than the 400R per engine. From your experience with the 300X’s, it sounds like you would really like the performance of the 300R. The amount of torque gained with the V8 package means you can still have great acceleration with taller pitch props. At midrange cruise, the 300R has also measured 40% better fuel economy than the 300X.

      Nick

      1. Thanks a lot Nick, I appreciate your input. Do you believe I would notice a measurable difference (3-5 mph) in top speed with a 300R application? I’d run cleavers if I had to. It would be nice to run 110 mph with full load of fuel and passengers and solid all around performance. Not sure if the 300R has enough to obtain this. Currently I’m 105 with 5 people on board and full fuel. Thanks.

        Cheers,

        Shaun

        1. Shaun,

          With 32 pitch CNC cleavers, I think you would be right on your 110 mph goal with people on board. The extra displacement of the new V8s also helps to reduce speed losses due to carrying heavier loads, as long as they are propped correctly.

          Nick

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