No announcement yet.

Mako 191 CC - Maximum Horsepower Rating

  • Time
  • Show
Clear All
new posts

  • Mako 191 CC - Maximum Horsepower Rating

    Likely a fairly controversial topic, but curious to what the group consensus is...

    I am repowering my 1998 191 Mako Center Console.

    The hull is 19'-4" and had a beam of 8'-2".

    According to Mako Specifications, the Recommended HP for this hull is 150hp.

    According to the USCG Placard, the Maximum HP is 180hp.

    However, according to the Code of Federal Regulations, Title 33, Section 183.53, I can calculate the Maximum Horsepower Capacity by using the following formula:

    Maximum Horsepower = (Boat Length x Transom Width) x 2 - 90.

    Using that formula, it gives me a Maximum Horsepower over 200.

    Given that this hull was produced prior to 4-stroke technology, I am only considering 2-strokes for weight consideration.

    I am looking for better performance than a 150hp, and given the affixed USCG Placard rating of 180hp, a 175hp 2-stroke would have been ideal.

    However, 175hp 2-strokes are a needle in a haystack, per my searches.

    Comparing weight, a 2003 Mercury 150XL EFI and a 2003 Mercury 200XL EFI have the same weight of 433lbs.

    I understand a lot of engineering went into the design of the hull, but am I opening up a can of worms by rigging a 200hp outboard? Id rather cruise at 3500rpms with a 200, than say 4000rpms with a 150. Not really looking to run around the whole day at WOT, but it's nice to have the power, should I need it.

    Also, should the USCG inspect my boat, can I reference the Code of Federal Regulations showing that I am still in conformance?

  • #2
    the uscg is never gonna look at your capacity plate. how fast do you want to cruise? my dad has a 192 with a 150. it cruises 3500 rpms at around 25 mph,,4000 sees around 28..4200,,30 mph,,tops out at 40-42 mph...
    Chris Miller[br]Mystic Islands, NJ[br]1974 17 Classic[br]1988 211 Classic (sold)[br]1990 Grady White 230 Gulfstream (sold)[br][img][br]


    • #3
      Your insurance company will likely ask what model motor is installed and what is the capacity. There the only ones that really seem interested...

      [br]1994 Mako 215 Dual console Optimax 225[br]1978 Mako 19 with 90hp johnson[br]1996 Mako 22[br]1982 Mako 171 Angler 135 Black Max Mercury[br]1987 21b 225 Yamaha[br]1974 23 inboard Gusto gone.[br]1979m21 225johnson \"blue dolphin\" bought off this board and restored [br]with everyone\'s help!!Gone but not Forgotten....[br]1979 20 Mako 115 Suzuki gone[br]1977 19 Mako 115 Johnson gone[br]1976 23 Mako twin 140 Johnsons gone[br]1983 224 with closed transom and bracket[br]And 162 SOB (some other boats)[br]Venice Florida, Traverse city Mi.


      • #4
        X2 to Michigan Dave. W/O insurance, my only concern would be the weight of the motor.

        I just hung this used 175hp 2 stroker on here 2 years ago & Etec's are running some very good warranty promos.

        10 years NON prorated, unlimited hours, all through BRP in Florida.

        3 plus 7 with 1500 hr cap in the rest of the country.
        1984 Mako 228 w/ 175hp E-Tec [br]1983 SeaRay 26\' Sundancer w/ 454 Big Block spinning Volvo DuoProps (Sold)[br]1989 Wahoo 17\' CC w/ 88hp Evinrude (vacationing in Key West)[br]


        • #5
          I have a 1975 19-foot cc Mako with a low transom and 115 4-stroke. With tailing seas I have had some issue with waves coming in over the transom. Be careful on weight in the back if you have a low transom. If you boat in saltwater.



          • #6

            My 1970 Mako 19 has a max hp of 150 but in 1970 an OB of that size weighted ~300lbs. Now, a 150hp weights between 400 and 500 lbs. Any thoughts?
            [br]Captain W[br]1970 Mako 19


            • #7
              Not sure of the accuracy, but here are some comps. of older 2 strokes

              V6 2448 cc (cross flow, 90 degree) platform, 150 HP

              25 inch shaft, elec. start, trim/tilt -- 402 lbs

              V6 2589 cc (loop charge, 60 degree) platform, 150/175 HP

              25 inch shaft, elec. start, trim/tilt -- 375 lbs

              The newer Gen1 Etec 150 is 418 lbs

              I would think the 4 strokes are heavier.

              The 150 Yammi 4 stroke is pushing 500 lbs.
              1984 Mako 228 w/ 175hp E-Tec [br]1983 SeaRay 26\' Sundancer w/ 454 Big Block spinning Volvo DuoProps (Sold)[br]1989 Wahoo 17\' CC w/ 88hp Evinrude (vacationing in Key West)[br]