Outboard questions

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  • Tlinder
    Junior Member
    • Sep 2020
    • 6

    #1

    Outboard questions

    I am new this is my first post, After being out of rc boats for 20 years I decided to get back , I ran nitro tunnels , I pulled out an old boat and I decided to go electric after watching videos , can someone who runs outboard tunnels suggest motor . lower unit . esc, and batteries. My boat is 35 inches long 15 inches wide , it was a 7.5 to 11cc boat made by aerotech. It weighs 6 pounds bare hull and cowling . thanks
  • HTVboats
    Senior Member
    • Jun 2011
    • 803

    #2
    We have a group of guys on the gulf side of Florida who run a Q limited class using 45 size tunnels. On 6 cells we limit motor size to 40X75mm. This power draws 140 -150amps and a Flycolor 150 (OSE Raider 150) seems to hold up well. A Seaking 180 would be more than enough and allow larger motors. That said the Leopard 40X74 1400kv and a M445-M545 or ABC 1816 will bring speeds of 50-55 mph for 6 laps. Go with a K&B 45 lower and the Hypreformance motor adapter.http://hyperprod.bizhosting.com/7_5_...rsion_kit.html

    A 5000ma battery or a pair of 3300ma 6S in parallel works well. Your Aerotech has plenty of room under the cowling to fit all the electronics. A single 200-300oz servo will be fine. Metal gear better.
    Now as to power options I have a 4020 Scorpion outrunner 1250kv that is a good choice but pricey. If you go with 3watts or more 40X82-40X92 you can easily hit 60 but you will find yourself upside down quickly. Try the 40X74 ($80) and you can always buy more power once you get handling sorted out.
    Mic

    Mic Halbrehder
    IMPBA 8656
    NAMBA 1414

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    • Tlinder
      Junior Member
      • Sep 2020
      • 6

      #3
      Thank you
      Thank you so much mic , now I have a good place to start. Also my boat still had two quarter scale futaba servos in it s134 I believe ,do you know if they would work with new style radios

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      • HTVboats
        Senior Member
        • Jun 2011
        • 803

        #4
        I always liked those 134's. One should steer the boat giving you a spare. They work fine on my latest Futaba T-FHSS and FASST radios
        Mic

        Mic Halbrehder
        IMPBA 8656
        NAMBA 1414

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        • RaceMechaniX
          Fast Electric Addict!
          • Sep 2007
          • 2821

          #5
          Just be sure if using a modern radio to adjust the servo setting from digital to analog if using a Futaba radio. That will prevent the servo from burning out.
          Tyler Garrard
          NAMBA 639/IMPBA 20525
          T-Hydro @ 142.94mph former WR

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          • Tlinder
            Junior Member
            • Sep 2020
            • 6

            #6
            Thanks race mechanics

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