Propulsion

Discuss marine engines, drives, and propulsion systems.

  1. Props

    Propeller selection, performance comparison, prediction, experience, and modification.
    Discussions:
    518
    Messages:
    6,069
    Latest: Protecting creatures and coral from propellers gonzo, Aug 25, 2022
    RSS

  2. Surface Drives

    Surface Drives. Arneson, BPM, Seafury, PSI, Levi, Etc.
    Discussions:
    181
    Messages:
    2,787
    Latest: Is Levi Drives still in business? CocoonCruisers, Sep 1, 2022
    RSS

  3. Jet Drives

    Jet Drives (pumps, impellers, etc.)
    Discussions:
    452
    Messages:
    4,348
    Latest: PP65 drive rebuild ETO, Jul 21, 2022
    RSS

  4. Outboards

    2-stroke and 4-stroke outboard motors.
    Discussions:
    1,016
    Messages:
    9,721
    Latest: Prop hub matched to gearbox DogCavalry, Sep 25, 2022 at 10:02 AM
    RSS

  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:
    543
    Messages:
    3,801
    Latest: Help identifying old sterndrives fallguy, Aug 8, 2021
    RSS

  6. Pod Drives

    Volvo IPS, ZF, CMD Zeus, and other pod-drive systems
    Discussions:
    29
    Messages:
    299
    Latest: 50-200 hp electric pod with nozzle and motor on hub? ram68ocean, Jul 5, 2021
    RSS

  7. Inboards

    Inboard and Vee-drive hardware: struts, stuffing boxes, transmissions, coolers
    Discussions:
    531
    Messages:
    4,929
    Latest: Steerable, Inboard shaft drive? BlueBell, Aug 22, 2022
    RSS

  8. Diesel Engines

    Diesel Engines
    Discussions:
    670
    Messages:
    8,407
    Latest: Diesel engine and propane philSweet, Sep 15, 2022
    RSS

  9. Gas Engines

    Gasoline Engines
    Discussions:
    417
    Messages:
    4,633
    Latest: Mercruiser 3.0L 1995 stalls after 1 min fallguy, Sep 23, 2022 at 9:22 PM
    RSS

  10. Electric Propulsion

    Electric propulsion systems
    Discussions:
    86
    Messages:
    1,674
    Latest: The Issue with going all Electric Flotation, Sep 24, 2022 at 2:24 AM
    RSS

  11. Hybrid

    Hybrid propulsion such as diesel electric, hydraulic.
    Discussions:
    211
    Messages:
    5,255
    Latest: Hinckley hybrid philSweet, Jul 26, 2022
    RSS

  12. DIY Marinizing

    A forum to discuss "do it yourself" marinizing of engines / conversion of automotive engines to marine use.
    Discussions:
    274
    Messages:
    5,526
    Latest: Marinize a Subaru? DogCavalry, Aug 9, 2021
    RSS
Page 1 of 25
Sort By:
Title Start Date
Replies Views
Last Message ↓
  1. telak

    Evinrude E-tec 300hp v6 what/how to check?

    telak, Jun 29, 2022 ... 2
    Replies:
    17
    Views:
    1,855
    telak
    Aug 9, 2022
  2. mackid068

    Favorite Type of Power for a Powerboat

    mackid068, Jun 27, 2005 ... 2 3
    Replies:
    38
    Views:
    10,096
    BlueBell
    Jul 28, 2022
  3. emrecantasdemir

    Dual - Fuel marine engines

    emrecantasdemir, Jun 3, 2022
    Replies:
    6
    Views:
    446
    baeckmo
    Jun 4, 2022
  4. DogCavalry

    Power to Weight Ratio

    DogCavalry, Apr 16, 2022
    Replies:
    9
    Views:
    690
    jehardiman
    Apr 17, 2022
  5. Ruffner Sedurifa

    Propeller Puller

    Ruffner Sedurifa, Mar 29, 2022
    Replies:
    10
    Views:
    627
    Ruffner Sedurifa
    Apr 3, 2022
  6. Kirk

    How to make a pedal powered prop.

    Kirk, Feb 24, 2022 ... 2
    Replies:
    15
    Views:
    1,079
    Kirk
    Feb 28, 2022
  7. DCockey

    Mercury 175 HP Outboard Diesel Fuel Spark Ignition

    DCockey, Feb 2, 2022
    Replies:
    4
    Views:
    563
    DogCavalry
    Feb 4, 2022
  8. captdon65

    prop pocket/tunnel problem solutions

    captdon65, Nov 28, 2016
    Replies:
    10
    Views:
    4,174
    Mike Goebel
    Jan 24, 2022
  9. BigMuddy

    Sternwheeler Power Requirements

    BigMuddy, Jan 17, 2022 ... 2
    Replies:
    21
    Views:
    1,101
    DogCavalry
    Jan 23, 2022
  10. alby joy

    Engine not reaching Rated RPM during gearbox engaged

    alby joy, Sep 2, 2021
    Replies:
    11
    Views:
    1,064
    comfisherman
    Nov 9, 2021
  11. LePrince

    Tug Bullard Pull Calculations

    LePrince, Oct 24, 2021
    Replies:
    6
    Views:
    715
    LePrince
    Oct 29, 2021
  12. Guest625101138

    DDWFTTW - Directly Downwind Faster Than The Wind

    Guest625101138, Jan 4, 2009 ... 38 39 40
    Replies:
    588
    Views:
    112,166
    gonzo
    Oct 4, 2021
  13. Rasmith

    Bio Inspired Propulsion

    Rasmith, Aug 28, 2021
    Replies:
    7
    Views:
    899
    Rasmith
    Sep 30, 2021
  14. HeyK20

    How are Thai Long Tail Boats Cooled?

    HeyK20, Jun 22, 2021
    Replies:
    3
    Views:
    791
    gonzo
    Aug 27, 2021
  15. yipster

    dual prop shaft ?

    yipster, Oct 30, 2002 ... 2 3
    Replies:
    34
    Views:
    38,473
    Christian Lucas
    May 17, 2021
  16. NikRitz

    Kayak motor

    NikRitz, Apr 22, 2020 ... 2
    Replies:
    23
    Views:
    3,394
    SolGato
    Apr 26, 2021
  17. tom kane

    Define what a Surface-Piercing propeller is

    tom kane, Jul 12, 2009 ... 13 14 15
    Replies:
    212
    Views:
    69,376
    tom kane
    Feb 18, 2021
  18. boat3630

    Test borg warner transmissions

    boat3630, Dec 31, 2020
    Replies:
    9
    Views:
    1,324
    gonzo
    Jan 3, 2021
  19. marufuddin0

    3D Propeller Design

    marufuddin0, Dec 13, 2020
    Replies:
    7
    Views:
    1,652
    Heimfried
    Dec 21, 2020
  20. aybabtme

    Fuel system plumbing (diesel)

    aybabtme, May 30, 2020
    Replies:
    4
    Views:
    1,081
    Jeremey Stadnik
    Dec 8, 2020
  21. brian eiland

    FLYWHEEL Energy Storage Systems

    brian eiland, Apr 21, 2010 ... 3 4 5
    Replies:
    69
    Views:
    32,636
    brian eiland
    Nov 16, 2020
  22. CAPT. Ted

    Conversion from Marine V-8 to 4 cyl diesel.

    CAPT. Ted, Oct 11, 2020
    Replies:
    2
    Views:
    1,269
    brendan gardam
    Oct 12, 2020
  23. AAn

    Wave force induced power proa magnetic propulsion

    AAn, Sep 3, 2020
    Replies:
    7
    Views:
    1,404
    Will Gilmore
    Sep 4, 2020
  24. hlblake

    1994 Crusader Xli

    hlblake, Aug 20, 2020 ... 2
    Replies:
    24
    Views:
    1,583
    brendan gardam
    Aug 25, 2020
  25. Manateeman

    Turbo coating with ceramics

    Manateeman, Aug 13, 2020
    Replies:
    4
    Views:
    872
    KeithO
    Aug 17, 2020
  26. Bradleylarkin

    Best Propulsion system for my boat

    Bradleylarkin, Jul 29, 2020
    Replies:
    7
    Views:
    1,201
    kapnD
    Aug 2, 2020
  27. Silverbreeze

    Diesel Outboards

    Silverbreeze, Jul 4, 2016 ... 2
    Replies:
    29
    Views:
    10,075
    Boatman1011
    Jul 31, 2020
  28. Andre Raath

    marinized 240D running hot

    Andre Raath, May 9, 2020 ... 2
    Replies:
    20
    Views:
    1,995
    sdowney717
    Jul 20, 2020
  29. UNCIVILIZED

    Help with a Repower,maybe with a Hand Crank Diesel?

    UNCIVILIZED, Aug 26, 2014
    Replies:
    13
    Views:
    3,547
    brendan gardam
    Jul 1, 2020
  30. YSS Caribbean

    Daily fuel consumption calculation

    YSS Caribbean, Jun 29, 2020
    Replies:
    7
    Views:
    1,225
    YSS Caribbean
    Jun 30, 2020
  31. JunkRat

    Looking for basic power formulas for electric drive...

    JunkRat, Jan 27, 2019 ... 2
    Replies:
    18
    Views:
    4,125
    Yobarnacle
    May 22, 2020
  32. Bharat Kandpal

    Calculations for designing a propeller?

    Bharat Kandpal, May 1, 2020
    Replies:
    5
    Views:
    1,244
    gonzo
    May 10, 2020
  33. brian eiland

    Retractable Marine Drives

    brian eiland, Aug 3, 2016 ... 2 3
    Replies:
    30
    Views:
    8,738
    brian eiland
    Apr 14, 2020
  34. Barry

    New Propeller Design

    Barry, Apr 2, 2020
    Replies:
    6
    Views:
    1,680
    Barry
    Apr 3, 2020
  35. Vronsky

    Bow thruster installation

    Vronsky, Jan 20, 2020
    Replies:
    10
    Views:
    1,306
    Vronsky
    Jan 21, 2020
  36. IronTom

    JetSki motorcycle engine - Loud and Hot exhaust

    IronTom, Dec 1, 2019
    Replies:
    3
    Views:
    1,752
    ondarvr
    Dec 1, 2019
  37. Victor R

    Flapping Foil

    Victor R, Sep 7, 2019
    Replies:
    3
    Views:
    2,182
    Victor R
    Oct 21, 2019
  38. Adarsh Edakkote

    Pusher tug-barge

    Adarsh Edakkote, Oct 4, 2019
    Replies:
    0
    Views:
    1,221
    Adarsh Edakkote
    Oct 4, 2019
  39. michael smith

    wheel size

    michael smith, Jun 7, 2019
    Replies:
    7
    Views:
    1,548
    jehardiman
    Jun 9, 2019
  40. michael smith

    paddle wheel

    michael smith, May 12, 2019
    Replies:
    6
    Views:
    1,708
    jehardiman
    May 16, 2019
Showing threads 1 to 40 of 963

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