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Overpowering your Mako

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  • Overpowering your Mako

    Hey there, I have an early Mako 22 and I noticed the USCG inspection plate says I can put a max HP of 230 on the transom. Currently I have a 1987 200hp suzuki on, it maxs out at 38mph. Reliablilty is becoming an issue, so I'm looking into replacements. If I were to repower with a Yam 250 it doesn't seem that weight is an issue. Are there other factors? Will Boat US insurance void any claim I make since the HP exceed USCG specs? Will I gain any knots with 50 more ponies or is 40 mph pretty much the max 'hull speed' for a 1972 22'?
    [br]Michael R. Delgado[br]1972 Mako 22[br]http://classicmako.com/forum/topic.asp?TOPIC_ID=15745[br]1976 Mako 25[br]http://classicmako.com/forum/topic.asp?TOPIC_ID=18013&SearchTerms=mako,25[br]

  • #2
    When your boat's max HP was rated, HP was measured at the crank. Since around the mid 80's HP has been mesured at the prop. Manufactures were also allowed something like 5 to 10 pcnt "fudge" factor on mesured vs. listed. So your 200 is probably about what the CG intended for your boat. On the other hand, power is good thing. You don't have to use it all. If everything is sound it can probably handle it. I don't know about your insurance. I don't think that insurance co's consider the change in HP rating.
    Tampa, FL [br]Mako 20C Merc 200[br]

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    • #3
      Hey, can I put in my 2 cents worth? Ah never mind.[]

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      • #4
        Beleive it or not Im not going to recomend that you stuff a 300hp on your boat. I have a customer with a 150 4 stroke yamaha on his 22 mako. you guys should see how nice this boat looks, all original. Any way, he was telling me all the perticulars about the boat and the performance and I am realy impressed. His boat will top out at about 40 and his fuel cunsumption is minimal compared to the 200 merc that was on it. Like all Mako junkies I asked a million questions And if I had a 20 or 22 I would definatly put a 4 stroke on it. Although Im a speed freak I think a 150/4 looks like the right number.

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        • #5
          Beleive it or not Im not going to recomend that you stuff a 300hp on your boat. I have a customer with a 150 4 stroke yamaha on his 22 mako. you guys should see how nice this boat looks, all original. Any way, he was telling me all the perticulars about the boat and the performance and I am realy impressed. His boat will top out at about 40 and his fuel cunsumption is minimal compared to the 200 merc that was on it. Like all Mako junkies I asked a million questions And if I had a 20 or 22 I would definatly put a 4 stroke on it. Although Im a speed freak I think a 150/4 looks like the right number.

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          • #6
            Yeah, another '72 Mako 22' owner. The specs on http://www.mako-boats.com/BoatSpecs/1972.htm also say maxHP is 230 HP for this boat. I have a '89 Suzuki 150 on mine, which fits real nice, (although I havn't checked absolute top speed) however, when its time to replace I will probably go with a 200.
            72\' Mako 22\'[br]NoNeck, VA

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            • #7
              Yeah, another '72 Mako 22' owner. The specs on http://www.mako-boats.com/BoatSpecs/1972.htm also say maxHP is 230 HP for this boat. I have a '89 Suzuki 150 on mine, which fits real nice, (although I havn't checked absolute top speed) however, when its time to replace I will probably go with a 200.
              72\' Mako 22\'[br]NoNeck, VA

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              • #8
                From what you guys say, it doesn't seem like the performance #'s change too much when changing the engine hp +/- 50hp. I love the 4 cycle idea, but can't justify it in the northeast, considering we use our boats 4 months out of the year, and personally only once a weekend, unfortunately. So, as far as a liability issue, no one has ever filed an insurance claim that has been voided due to overpowering their boat? thanks for the responses
                [br]Michael R. Delgado[br]1972 Mako 22[br]http://classicmako.com/forum/topic.asp?TOPIC_ID=15745[br]1976 Mako 25[br]http://classicmako.com/forum/topic.asp?TOPIC_ID=18013&SearchTerms=mako,25[br]

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