Propulsion

Discuss marine engines, drives, and propulsion systems.

  1. Props

    Propeller selection, performance comparison, prediction, experience, and modification.
    Discussions:
    542
    Messages:
    6,432
    Latest: Availability of 6 spline props BlueBell, Dec 30, 2024
    RSS

  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
    RSS

  3. Jet Drives

    Jet Drives (pumps, impellers, etc.)
    Discussions:
    461
    Messages:
    4,436
    Latest: Vospower water jets Ovrthhills, Aug 20, 2024
    RSS

  4. Outboards

    2-stroke and 4-stroke outboard motors.
    Discussions:
    1,040
    Messages:
    10,006
    Latest: 6 spline prop availability pistnbroke, Dec 23, 2024
    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:
    549
    Messages:
    3,839
    Latest: Stern Powr Parts Laurence Bellamy, Aug 3, 2024
    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:
    538
    Messages:
    4,991
    Latest: Magnetic couplings portacruise, Oct 25, 2024
    RSS

  8. Diesel Engines

    Diesel Engines
    Discussions:
    689
    Messages:
    8,587
    Latest: Mild overhaul and then repower, Cat 3208 to ? gonzo, Jan 9, 2025
    RSS

  9. Gas Engines

    Gasoline Engines
    Discussions:
    423
    Messages:
    4,652
    Latest: Anyone need a torque monster 383 SBC? gonzo, Sep 24, 2024
    RSS

  10. Electric Propulsion

    Electric propulsion systems
    Discussions:
    106
    Messages:
    2,094
    Latest: In which way are diagrams for BL DC motors derived (and to understand)? Heimfried, Jan 15, 2025 at 1:40 AM
    RSS

  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
    RSS

  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
    RSS
Page 2 of 25
Sort By:
Title Start Date
Replies Views
Last Message ↓
  1. aybabtme

    Fuel system plumbing (diesel)

    aybabtme, May 30, 2020
    Replies:
    4
    Views:
    2,177
    Jeremey Stadnik
    Dec 8, 2020
  2. brian eiland

    FLYWHEEL Energy Storage Systems

    brian eiland, Apr 21, 2010 ... 3 4 5
    Replies:
    69
    Views:
    38,443
    brian eiland
    Nov 16, 2020
  3. CAPT. Ted

    Conversion from Marine V-8 to 4 cyl diesel.

    CAPT. Ted, Oct 11, 2020
    Replies:
    2
    Views:
    3,460
    brendan gardam
    Oct 12, 2020
  4. AAn

    Wave force induced power proa magnetic propulsion

    AAn, Sep 3, 2020
    Replies:
    7
    Views:
    3,020
    Will Gilmore
    Sep 4, 2020
  5. hlblake

    1994 Crusader Xli

    hlblake, Aug 20, 2020 ... 2
    Replies:
    24
    Views:
    3,664
    brendan gardam
    Aug 25, 2020
  6. Manateeman

    Turbo coating with ceramics

    Manateeman, Aug 13, 2020
    Replies:
    4
    Views:
    1,871
    KeithO
    Aug 17, 2020
  7. Bradleylarkin

    Best Propulsion system for my boat

    Bradleylarkin, Jul 29, 2020
    Replies:
    7
    Views:
    2,212
    kapnD
    Aug 2, 2020
  8. Silverbreeze

    Diesel Outboards

    Silverbreeze, Jul 4, 2016 ... 2
    Replies:
    29
    Views:
    12,609
    Boatman1011
    Jul 31, 2020
  9. Andre Raath

    marinized 240D running hot

    Andre Raath, May 9, 2020 ... 2
    Replies:
    20
    Views:
    4,252
    sdowney717
    Jul 20, 2020
  10. UNCIVILIZED

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

    UNCIVILIZED, Aug 26, 2014
    Replies:
    13
    Views:
    4,951
    brendan gardam
    Jul 1, 2020
  11. YSS Caribbean

    Daily fuel consumption calculation

    YSS Caribbean, Jun 29, 2020
    Replies:
    7
    Views:
    2,375
    YSS Caribbean
    Jun 30, 2020
  12. JunkRat

    Looking for basic power formulas for electric drive...

    JunkRat, Jan 27, 2019 ... 2
    Replies:
    18
    Views:
    7,633
    Yobarnacle
    May 22, 2020
  13. Bharat Kandpal

    Calculations for designing a propeller?

    Bharat Kandpal, May 1, 2020
    Replies:
    5
    Views:
    2,283
    gonzo
    May 10, 2020
  14. brian eiland

    Retractable Marine Drives

    brian eiland, Aug 3, 2016 ... 2 3
    Replies:
    30
    Views:
    11,970
    brian eiland
    Apr 14, 2020
  15. Barry

    New Propeller Design

    Barry, Apr 2, 2020
    Replies:
    6
    Views:
    3,102
    Barry
    Apr 3, 2020
  16. Vronsky

    Bow thruster installation

    Vronsky, Jan 20, 2020
    Replies:
    10
    Views:
    2,171
    Vronsky
    Jan 21, 2020
  17. IronTom

    JetSki motorcycle engine - Loud and Hot exhaust

    IronTom, Dec 1, 2019
    Replies:
    3
    Views:
    2,663
    ondarvr
    Dec 1, 2019
  18. Victor R

    Flapping Foil

    Victor R, Sep 7, 2019
    Replies:
    3
    Views:
    3,011
    Victor R
    Oct 21, 2019
  19. Adarsh Edakkote

    Pusher tug-barge

    Adarsh Edakkote, Oct 4, 2019
    Replies:
    0
    Views:
    2,028
    Adarsh Edakkote
    Oct 4, 2019
  20. michael smith

    wheel size

    michael smith, Jun 7, 2019
    Replies:
    7
    Views:
    2,260
    jehardiman
    Jun 9, 2019
  21. michael smith

    paddle wheel

    michael smith, May 12, 2019
    Replies:
    6
    Views:
    2,507
    jehardiman
    May 16, 2019
  22. highlandhoh3

    outboard in center of shanty boat

    highlandhoh3, Mar 29, 2019
    Replies:
    9
    Views:
    2,354
    Boat Design Net Moderator
    Mar 29, 2019
  23. Dr34m3r

    Article on Waterjet propulsion

    Dr34m3r, Mar 7, 2019
    Replies:
    0
    Views:
    2,407
    Dr34m3r
    Mar 7, 2019
  24. oliver.ilg

    Cable or Chain Ferry

    oliver.ilg, Mar 11, 2015 ... 2
    Replies:
    23
    Views:
    12,158
    Solar Guy
    Mar 2, 2019
  25. Jamesmcl

    Twin outboard prop replacement

    Jamesmcl, Feb 1, 2019
    Replies:
    2
    Views:
    2,224
    Mr Efficiency
    Feb 2, 2019
  26. xellz

    Propulsion general questions for heavy use on 30ft power cat.

    xellz, Dec 29, 2018 ... 2
    Replies:
    24
    Views:
    4,537
    JunkRat
    Jan 27, 2019
  27. Magnus W

    What source for electric energy in a hybrid system?

    Magnus W, Dec 20, 2018 ... 2
    Replies:
    23
    Views:
    4,171
    Christian Lucas
    Jan 25, 2019
  28. Pceditorpro

    Buying or Building a Z Drive?

    Pceditorpro, Dec 3, 2018
    Replies:
    11
    Views:
    4,164
    xrudi
    Jan 12, 2019
  29. Barry

    Low speed trolling with large Horsepower Motors

    Barry, Jan 9, 2019
    Replies:
    5
    Views:
    3,149
    tpenfield
    Jan 11, 2019
  30. captainralph

    DIY Gas Sep Combo

    captainralph, Dec 23, 2018
    Replies:
    2
    Views:
    1,887
    captainralph
    Dec 24, 2018
  31. Brian.Lin

    tug boat engine mounts design (rigid? or flexible?)

    Brian.Lin, Nov 16, 2018
    Replies:
    13
    Views:
    3,257
    Ad Hoc
    Nov 20, 2018
  32. Afilimon

    How to select motors for catamaran?

    Afilimon, Nov 4, 2018 ... 2
    Replies:
    16
    Views:
    4,469
    gonzo
    Nov 8, 2018
  33. DCockey

    Raw seawater as only fuel claim

    DCockey, Sep 28, 2018
    Replies:
    8
    Views:
    2,719
    Blueknarr
    Sep 29, 2018
  34. Archangl7

    electric golf cart inboard design, need help!

    Archangl7, Sep 4, 2018
    Replies:
    7
    Views:
    4,153
    Archangl7
    Sep 13, 2018
  35. ocean dreamer

    Yachting propulsion systems

    ocean dreamer, Sep 2, 2018
    Replies:
    4
    Views:
    2,165
    JamesG123
    Sep 2, 2018
  36. crwsound

    Velvet Drive: How to Separate Reduction Housing from Gearbox?

    crwsound, Aug 5, 2018
    Replies:
    9
    Views:
    6,074
    MikeJohns
    Aug 7, 2018
  37. James007

    convert inboard to outboard

    James007, Nov 20, 2008
    Replies:
    6
    Views:
    9,551
    Butch
    Jul 11, 2018
  38. sdowney717

    Jabsco 4528 impeller pin, does it push or thread in

    sdowney717, Jul 3, 2018
    Replies:
    2
    Views:
    1,733
    sdowney717
    Jul 7, 2018
  39. 5teve

    Muffler Drains

    5teve, Mar 7, 2018
    Replies:
    9
    Views:
    3,086
    5teve
    Jun 25, 2018
  40. Israel

    Bayliner 2.3 turbo

    Israel, May 26, 2018
    Replies:
    10
    Views:
    3,129
    Israel
    May 30, 2018
Showing threads 41 to 80 of 982

Thread Display Options

Loading...
Page 2 of 25