1. Props

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

   Discussions:

   540

   Messages:

   6,364

   

   Latest: Power predition formula Stephen Ditmore, Aug 28, 2024

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2. Surface Drives

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

   Discussions:

   186

   Messages:

   2,863

   

   Latest: Inboard surface drive small boat. Master spearfisher, Sep 8, 2024 at 9:55 AM

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3. Jet Drives

   Jet Drives (pumps, impellers, etc.)

   Discussions:

   461

   Messages:

   4,436

   

   Latest: Vospower water jets Ovrthhills, Aug 20, 2024

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4. Outboards

   2-stroke and 4-stroke outboard motors.

   Discussions:

   1,035

   Messages:

   9,967

   

   Latest: Engineering an Outboard Mount for 180 RofM jehardiman, Sep 5, 2024 at 8:11 PM

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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:

   549

   Messages:

   3,839

   1. Gas Engines (link)

   2. Diesel Engines (link)

   

   Latest: Stern Powr Parts Laurence Bellamy, Aug 3, 2024

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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:

   537

   Messages:

   4,979

   1. Gas Engines (link)

   2. Diesel Engines (link)

   

   Latest: Wrong Gasket 71-C Velvet drive Water Dog, Aug 15, 2024

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8. Diesel Engines

   Diesel Engines

   Discussions:

   688

   Messages:

   8,568

   

   Latest: Mild overhaul and then repower, Cat 3208 to ? BlueBell, Sep 3, 2024 at 12:55 PM

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9. Gas Engines

   Gasoline Engines

   Discussions:

   422

   Messages:

   4,650

   

   Latest: starting rebuild engine comfisherman, Aug 31, 2023

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10. Electric Propulsion

    Electric propulsion systems

    Discussions:

    101

    Messages:

    1,984

    

    Latest: I can't calculate engine power requirements, can anyone help? Ad Hoc, Sep 2, 2024

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11. Hybrid

    Hybrid propulsion such as diesel electric, hydraulic.

    Discussions:

    211

    Messages:

    5,257

    

    Latest: Trolling Motor(s) for Primary Propulsion of 15' AL 'skiff' cahudson42, May 31, 2024

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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:

    276

    Messages:

    5,577

    

    Latest: VW/AUDI 3.0TDI marinising Skravo, Aug 18, 2024

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