Propulsion

Discuss marine engines, drives, and propulsion systems.

  1. Props

    Propeller selection, performance comparison, prediction, experience, and modification.
    Discussions:
    534
    Messages:
    6,257
    Latest: How do different propeller shaft angles impact the performance of marine vessels? rangebowdrie, Apr 19, 2024 at 3:41 AM
    RSS

  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
    RSS

  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
    RSS

  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
    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:
    547
    Messages:
    3,828
    Latest: Welded metal belows - would that work for sterndrive? Nidza, Oct 20, 2023
    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:
    535
    Messages:
    4,968
    Latest: Use oversized flexible coupling? comfisherman, Mar 9, 2024
    RSS

  8. Diesel Engines

    Diesel Engines
    Discussions:
    682
    Messages:
    8,498
    Latest: Hino WO4CTI in a 26' Tollycraft David Swingler, Mar 22, 2024
    RSS

  9. Gas Engines

    Gasoline Engines
    Discussions:
    422
    Messages:
    4,650
    Latest: starting rebuild engine comfisherman, Aug 31, 2023
    RSS

  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
    RSS

  11. Hybrid

    Hybrid propulsion such as diesel electric, hydraulic.
    Discussions:
    211
    Messages:
    5,256
    Latest: Hydrogen Fuel cells for ships DogCavalry, Jan 3, 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:
    5,576
    Latest: New Detroit Diesel Marinization Chris Konrad, Feb 14, 2024
    RSS
Page 6 of 25
Sort By:
Title Start Date
Replies Views
Last Message ↓
  1. flipper 15

    Electric power for very small boat

    flipper 15, May 26, 2013
    Replies:
    1
    Views:
    2,453
    CDK
    May 27, 2013
  2. Pond Sailer

    DIY EV kayak discussion on your solution to get more run time with easy to find parts

    Pond Sailer, May 24, 2013
    Replies:
    1
    Views:
    2,407
    Pond Sailer
    May 24, 2013
  3. runwucong

    KT KQ and Eta polynomials for the AU or MAU

    runwucong, May 18, 2013
    Replies:
    0
    Views:
    2,005
    runwucong
    May 18, 2013
  4. Creeky

    Inboard Diesel to CPP via V-Drive - Transmission in forward, thrust in reverse...

    Creeky, Apr 30, 2013
    Replies:
    9
    Views:
    3,706
    Creeky
    May 14, 2013
  5. SixMadrid

    Brainstorming! Suggestions to propel a FRP Trawler

    SixMadrid, Apr 22, 2013 ... 2
    Replies:
    21
    Views:
    4,691
    SixMadrid
    Apr 25, 2013
  6. SailorDon

    Sub-Topic Human Powered

    SailorDon, Apr 8, 2013
    Replies:
    5
    Views:
    2,957
    PAR
    Apr 9, 2013
  7. JosephT

    Paddle wheel thrust

    JosephT, Mar 11, 2013
    Replies:
    5
    Views:
    7,929
    fredrosse
    Apr 6, 2013
  8. tomas

    Battery powered 'ferry of the future' using Rolls-Royce propulsion system

    tomas, Mar 23, 2013
    Replies:
    0
    Views:
    2,499
    tomas
    Mar 23, 2013
  9. majaregielou

    relation of Engine HP to RPM

    majaregielou, Mar 12, 2013
    Replies:
    8
    Views:
    2,744
    gonzo
    Mar 15, 2013
  10. gypsywaters

    Engine anti-sython

    gypsywaters, Mar 3, 2013
    Replies:
    9
    Views:
    2,600
    Landlubber
    Mar 4, 2013
  11. assycat

    jet powered bolger micro trawler?

    assycat, Feb 17, 2013
    Replies:
    1
    Views:
    8,749
    FAST FRED
    Feb 21, 2013
  12. vaderverdi74

    Electric outboard conversion

    vaderverdi74, Feb 20, 2012
    Replies:
    9
    Views:
    10,708
    nevada14
    Feb 3, 2013
  13. MikeJohns

    Smaller vessel thrust bearings.

    MikeJohns, Jan 29, 2013
    Replies:
    14
    Views:
    13,758
    pdwiley
    Feb 1, 2013
  14. pavel915

    Experience with the KaMeWa water jet propulsion system

    pavel915, Feb 1, 2013
    Replies:
    0
    Views:
    3,074
    pavel915
    Feb 1, 2013
  15. tomuchstuff

    bertram 35" mercrusier bmw d219 diesel repower ???????

    tomuchstuff, Oct 5, 2007
    Replies:
    9
    Views:
    7,122
    prowlersfish
    Jan 6, 2013
  16. sundipkumar

    passenger catamaran

    sundipkumar, Dec 6, 2012
    Replies:
    11
    Views:
    4,553
    hoytedow
    Dec 6, 2012
  17. ytquest

    Water Jet Bow Thruster

    ytquest, Nov 25, 2012 ... 2
    Replies:
    29
    Views:
    24,229
    murdomack
    Dec 2, 2012
  18. bassCat

    Pedal Drive

    bassCat, May 5, 2012
    Replies:
    3
    Views:
    6,676
    KDB955
    Nov 8, 2012
  19. swashdrive

    Fin propulsion

    swashdrive, Oct 26, 2012
    Replies:
    3
    Views:
    3,852
    daiquiri
    Oct 27, 2012
  20. joco

    saw this on youtube.

    joco, Aug 18, 2012
    Replies:
    6
    Views:
    2,754
    johneck
    Oct 16, 2012
  21. brian eiland

    in-line 6 Cylinder Engines, 'straight-six'

    brian eiland, Jun 26, 2012 ... 6 7 8
    Replies:
    111
    Views:
    56,346
    Frosty
    Oct 11, 2012
  22. sdowney717

    will a severely barnacled hull prevent engine from reving up to full speed?

    sdowney717, Oct 7, 2012 ... 2
    Replies:
    24
    Views:
    10,252
    jonr
    Oct 10, 2012
  23. drortiz1

    Paddle Wheel Design Project

    drortiz1, Sep 20, 2012 ... 2 3 4
    Replies:
    50
    Views:
    15,790
    Frosty
    Oct 9, 2012
  24. paulfish

    Put a square rigged sail on a W/A??

    paulfish, Sep 19, 2012 ... 2
    Replies:
    15
    Views:
    3,921
    paulfish
    Sep 24, 2012
  25. hydroplanedude

    re powering a 16 foot hydroplane

    hydroplanedude, Sep 15, 2012
    Replies:
    2
    Views:
    2,350
    PAR
    Sep 17, 2012
  26. swashdrive

    Calculating thrust

    swashdrive, Sep 11, 2012
    Replies:
    2
    Views:
    5,438
    ldigas
    Sep 12, 2012
  27. parkland

    Engine bolt patterns and adapters for chevy marine engines

    parkland, Aug 26, 2012
    Replies:
    14
    Views:
    10,204
    FAST FRED
    Sep 4, 2012
  28. Adeyele

    How to determine the RPM of a vessel.

    Adeyele, Sep 3, 2012
    Replies:
    4
    Views:
    7,096
    DCockey
    Sep 3, 2012
  29. jim lee

    Anyone played around with a magnetohydrodynamic drive?

    jim lee, Aug 27, 2012
    Replies:
    14
    Views:
    3,582
    jim lee
    Aug 31, 2012
  30. montyrosevear

    2.9 LTR turbo

    montyrosevear, Aug 22, 2012
    Replies:
    1
    Views:
    2,019
    Frosty
    Aug 22, 2012
  31. Wayne Kendall

    Thrust bearing temperature

    Wayne Kendall, Aug 20, 2012
    Replies:
    3
    Views:
    2,782
    jehardiman
    Aug 20, 2012
  32. tugboat

    anyone seen this new dyson fan- and its potential for marine use?

    tugboat, Jun 24, 2012 ... 2
    Replies:
    24
    Views:
    12,423
    troy2000
    Aug 20, 2012
  33. sdowney717

    fuel selection valve arrangement 2 tanks 3 engines

    sdowney717, Aug 16, 2012
    Replies:
    3
    Views:
    3,164
    sdowney717
    Aug 20, 2012
  34. SudorracMechEng

    wiggle drive propulsion application

    SudorracMechEng, May 7, 2012 ... 19 20 21
    Replies:
    304
    Views:
    50,586
    swashdrive
    Aug 17, 2012
  35. Adeyele

    Fuel coefficient value.

    Adeyele, Aug 4, 2012
    Replies:
    3
    Views:
    9,797
    CDK
    Aug 14, 2012
  36. Philligan

    Transom mounted Exhaust Flappers

    Philligan, May 30, 2012
    Replies:
    1
    Views:
    2,406
    FAST FRED
    Aug 6, 2012
  37. ErikdeJong

    Reverse prop calculations

    ErikdeJong, May 11, 2012 ... 2
    Replies:
    19
    Views:
    4,772
    FAST FRED
    Aug 6, 2012
  38. brian eiland

    Liquid Air Engine

    brian eiland, Jan 25, 2012 ... 7 8 9
    Replies:
    121
    Views:
    25,171
    RonL
    Aug 1, 2012
  39. CatBuilder
    Locked

    Brainstorming Retractable Drives

    CatBuilder, Sep 29, 2011 ... 3 4 5
    Replies:
    64
    Views:
    26,634
    brian eiland
    Jul 29, 2012
  40. santoo

    The vertical center of effort (VCE) of the propulsor shaft line

    santoo, Jul 24, 2012
    Replies:
    0
    Views:
    2,267
    santoo
    Jul 24, 2012
Showing threads 201 to 240 of 977

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