1. Props

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

   Discussions:

   535

   Messages:

   6,262

   

   Latest: Sharrow counterrotating propeller seems to have negative stagger and positive stagger seasquirt, Apr 22, 2024 at 9:42 PM

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2. Surface Drives

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

   Discussions:

   186

   Messages:

   2,860

   

   Latest: Longtail Evolution Dave G 9N, Jan 20, 2024

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3. Jet Drives

   Jet Drives (pumps, impellers, etc.)

   Discussions:

   461

   Messages:

   4,431

   

   Latest: Vospower water jets Maksim Smirnov, Apr 18, 2024 at 6:48 AM

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4. Outboards

   2-stroke and 4-stroke outboard motors.

   Discussions:

   1,029

   Messages:

   9,902

   

   Latest: How many adjustment points are there on a 1999 25 hp carb? valvebounce, Feb 27, 2024

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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:

   547

   Messages:

   3,828

   1. Gas Engines (link)

   2. Diesel Engines (link)

   

   Latest: Welded metal belows - would that work for sterndrive? Nidza, Oct 20, 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:

   535

   Messages:

   4,968

   1. Gas Engines (link)

   2. Diesel Engines (link)

   

   Latest: Use oversized flexible coupling? comfisherman, Mar 9, 2024

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8. Diesel Engines

   Diesel Engines

   Discussions:

   682

   Messages:

   8,498

   

   Latest: Hino WO4CTI in a 26' Tollycraft David Swingler, Mar 22, 2024

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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:

    99

    Messages:

    1,952

    

    Latest: ask for help in Converting a propulsion system for a tugboat to a fully electric Rumars, Apr 9, 2024

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11. Hybrid

    Hybrid propulsion such as diesel electric, hydraulic.

    Discussions:

    211

    Messages:

    5,256

    

    Latest: Hydrogen Fuel cells for ships DogCavalry, Jan 3, 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:

    5,576

    

    Latest: New Detroit Diesel Marinization Chris Konrad, Feb 14, 2024

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