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 6 of 25
Sort By:
Title Start Date
Replies Views
Last Message ↓
  1. ThrottleBack

    Trolling motor placement help

    ThrottleBack, Jun 22, 2013
    Replies:
    5
    Views:
    3,006
    PAR
    Jul 1, 2013
  2. lausl

    Recuperation of energy while sailing

    lausl, Oct 4, 2012
    Replies:
    12
    Views:
    3,773
    alan white
    Jun 27, 2013
  3. tom kane

    Very simple motor hook up.

    tom kane, Jun 25, 2013
    Replies:
    7
    Views:
    3,294
    whitepointer23
    Jun 27, 2013
  4. mitul_09

    Dfde

    mitul_09, Jun 21, 2013
    Replies:
    2
    Views:
    2,069
    mitul_09
    Jun 24, 2013
  5. rwatson

    Power Storage in a wobbly flywheel

    rwatson, May 28, 2013
    Replies:
    10
    Views:
    3,821
    gonzo
    May 30, 2013
  6. flipper 15

    Electric power for very small boat

    flipper 15, May 26, 2013
    Replies:
    1
    Views:
    2,696
    CDK
    May 27, 2013
  7. 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:
    2,635
    Pond Sailer
    May 24, 2013
  8. runwucong

    KT KQ and Eta polynomials for the AU or MAU

    runwucong, May 18, 2013
    Replies:
    0
    Views:
    2,178
    runwucong
    May 18, 2013
  9. Creeky

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

    Creeky, Apr 30, 2013
    Replies:
    9
    Views:
    4,196
    Creeky
    May 14, 2013
  10. SixMadrid

    Brainstorming! Suggestions to propel a FRP Trawler

    SixMadrid, Apr 22, 2013 ... 2
    Replies:
    21
    Views:
    5,174
    SixMadrid
    Apr 25, 2013
  11. SailorDon

    Sub-Topic Human Powered

    SailorDon, Apr 8, 2013
    Replies:
    5
    Views:
    3,334
    PAR
    Apr 9, 2013
  12. JosephT

    Paddle wheel thrust

    JosephT, Mar 11, 2013
    Replies:
    5
    Views:
    8,476
    fredrosse
    Apr 6, 2013
  13. tomas

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

    tomas, Mar 23, 2013
    Replies:
    0
    Views:
    2,718
    tomas
    Mar 23, 2013
  14. majaregielou

    relation of Engine HP to RPM

    majaregielou, Mar 12, 2013
    Replies:
    8
    Views:
    3,031
    gonzo
    Mar 15, 2013
  15. gypsywaters

    Engine anti-sython

    gypsywaters, Mar 3, 2013
    Replies:
    9
    Views:
    2,871
    Landlubber
    Mar 4, 2013
  16. assycat

    jet powered bolger micro trawler?

    assycat, Feb 17, 2013
    Replies:
    1
    Views:
    9,268
    FAST FRED
    Feb 21, 2013
  17. vaderverdi74

    Electric outboard conversion

    vaderverdi74, Feb 20, 2012
    Replies:
    9
    Views:
    11,154
    nevada14
    Feb 3, 2013
  18. MikeJohns

    Smaller vessel thrust bearings.

    MikeJohns, Jan 29, 2013
    Replies:
    14
    Views:
    14,675
    pdwiley
    Feb 1, 2013
  19. pavel915

    Experience with the KaMeWa water jet propulsion system

    pavel915, Feb 1, 2013
    Replies:
    0
    Views:
    3,376
    pavel915
    Feb 1, 2013
  20. tomuchstuff

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

    tomuchstuff, Oct 5, 2007
    Replies:
    9
    Views:
    7,342
    prowlersfish
    Jan 6, 2013
  21. sundipkumar

    passenger catamaran

    sundipkumar, Dec 6, 2012
    Replies:
    11
    Views:
    4,759
    hoytedow
    Dec 6, 2012
  22. ytquest

    Water Jet Bow Thruster

    ytquest, Nov 25, 2012 ... 2
    Replies:
    29
    Views:
    25,680
    murdomack
    Dec 2, 2012
  23. bassCat

    Pedal Drive

    bassCat, May 5, 2012
    Replies:
    3
    Views:
    7,090
    KDB955
    Nov 8, 2012
  24. swashdrive

    Fin propulsion

    swashdrive, Oct 26, 2012
    Replies:
    3
    Views:
    4,222
    daiquiri
    Oct 27, 2012
  25. joco

    saw this on youtube.

    joco, Aug 18, 2012
    Replies:
    6
    Views:
    2,912
    johneck
    Oct 16, 2012
  26. brian eiland

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

    brian eiland, Jun 26, 2012 ... 6 7 8
    Replies:
    111
    Views:
    59,796
    Frosty
    Oct 11, 2012
  27. sdowney717

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

    sdowney717, Oct 7, 2012 ... 2
    Replies:
    24
    Views:
    11,259
    jonr
    Oct 10, 2012
  28. drortiz1

    Paddle Wheel Design Project

    drortiz1, Sep 20, 2012 ... 2 3 4
    Replies:
    50
    Views:
    17,074
    Frosty
    Oct 9, 2012
  29. paulfish

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

    paulfish, Sep 19, 2012 ... 2
    Replies:
    15
    Views:
    4,310
    paulfish
    Sep 24, 2012
  30. hydroplanedude

    re powering a 16 foot hydroplane

    hydroplanedude, Sep 15, 2012
    Replies:
    2
    Views:
    2,591
    PAR
    Sep 17, 2012
  31. swashdrive

    Calculating thrust

    swashdrive, Sep 11, 2012
    Replies:
    2
    Views:
    5,945
    ldigas
    Sep 12, 2012
  32. parkland

    Engine bolt patterns and adapters for chevy marine engines

    parkland, Aug 26, 2012
    Replies:
    14
    Views:
    10,858
    FAST FRED
    Sep 4, 2012
  33. Adeyele

    How to determine the RPM of a vessel.

    Adeyele, Sep 3, 2012
    Replies:
    4
    Views:
    7,511
    DCockey
    Sep 3, 2012
  34. jim lee

    Anyone played around with a magnetohydrodynamic drive?

    jim lee, Aug 27, 2012
    Replies:
    14
    Views:
    3,928
    jim lee
    Aug 31, 2012
  35. montyrosevear

    2.9 LTR turbo

    montyrosevear, Aug 22, 2012
    Replies:
    1
    Views:
    2,224
    Frosty
    Aug 22, 2012
  36. Wayne Kendall

    Thrust bearing temperature

    Wayne Kendall, Aug 20, 2012
    Replies:
    3
    Views:
    3,168
    jehardiman
    Aug 20, 2012
  37. tugboat

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

    tugboat, Jun 24, 2012 ... 2
    Replies:
    24
    Views:
    13,363
    troy2000
    Aug 20, 2012
  38. sdowney717

    fuel selection valve arrangement 2 tanks 3 engines

    sdowney717, Aug 16, 2012
    Replies:
    3
    Views:
    3,459
    sdowney717
    Aug 20, 2012
  39. SudorracMechEng

    wiggle drive propulsion application

    SudorracMechEng, May 7, 2012 ... 19 20 21
    Replies:
    304
    Views:
    54,164
    swashdrive
    Aug 17, 2012
  40. Adeyele

    Fuel coefficient value.

    Adeyele, Aug 4, 2012
    Replies:
    3
    Views:
    10,676
    CDK
    Aug 14, 2012
Showing threads 201 to 240 of 982

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