1. Props

   Propeller selection, performance comparison, prediction, experience, and modification.

   Discussions:

   520

   Messages:

   6,127

   

   Latest: Thrust power Robert McFadden, Mar 17, 2023 at 2:24 PM

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2. Surface Drives

   Surface Drives. Arneson, BPM, Seafury, PSI, Levi, Etc.

   Discussions:

   182

   Messages:

   2,788

   

   Latest: Paddle Wheel References elcastro, Nov 21, 2022

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3. Jet Drives

   Jet Drives (pumps, impellers, etc.)

   Discussions:

   453

   Messages:

   4,355

   

   Latest: Jet drive manufacturers offering dynamic positioning? comfisherman, Dec 10, 2022

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4. Outboards

   2-stroke and 4-stroke outboard motors.

   Discussions:

   1,020

   Messages:

   9,782

   

   Latest: Trim motor amps cmaas, Feb 23, 2023

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5. Sterndrives

   Stern drive lower and upper units, transom and gimbal assemblies, steering, and trim pumps. Mercruiser (Alpha One, Alpha One Generation II, Alpha SS, Bravo One, Bravo Two, Bravo Three, Bravo XR Sportmaster, TRS, Speed Master), IMCO, ILMOR, Konrad, OMC, Volvo Penta

   Discussions:

   545

   Messages:

   3,815

   1. Gas Engines (link)

   2. Diesel Engines (link)

   

   Latest: Sterndrives on a vessel that is permanently in saltwater - OK or bad idea? DogCavalry, Jan 6, 2023

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6. Pod Drives

   Volvo IPS, ZF, CMD Zeus, and other pod-drive systems

   Discussions:

   29

   Messages:

   299

   1. Gas Engines (link)

   2. Diesel Engines (link)

   

   Latest: 50-200 hp electric pod with nozzle and motor on hub? ram68ocean, Jul 5, 2021

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7. Inboards

   Inboard and Vee-drive hardware: struts, stuffing boxes, transmissions, coolers

   Discussions:

   534

   Messages:

   4,947

   1. Gas Engines (link)

   2. Diesel Engines (link)

   

   Latest: What trans for Kubota 1505 Rumars, Jan 27, 2023

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8. Diesel Engines

   Diesel Engines

   Discussions:

   675

   Messages:

   8,432

   

   Latest: Insight in diesel Luhrs 28 re-power 7228sedan, Mar 15, 2023

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9. Gas Engines

   Gasoline Engines

   Discussions:

   419

   Messages:

   4,637

   

   Latest: Weber / Textron motors ABDlc, Jan 24, 2023

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10. Electric Propulsion

    Electric propulsion systems

    Discussions:

    90

    Messages:

    1,795

    

    Latest: Electric RIB overpowered? alan craig, Mar 15, 2023

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11. Hybrid

    Hybrid propulsion such as diesel electric, hydraulic.

    Discussions:

    211

    Messages:

    5,255

    

    Latest: Hinckley hybrid philSweet, Jul 26, 2022

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12. DIY Marinizing

    A forum to discuss "do it yourself" marinizing of engines / conversion of automotive engines to marine use.

    Discussions:

    275

    Messages:

    5,555

    

    Latest: Propulsion Options for a 5t utility barge NicB, Nov 28, 2022

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