Propulsion

Discuss marine engines, drives, and propulsion systems.

  1. Props

    Propeller selection, performance comparison, prediction, experience, and modification.
    Discussions:
    535
    Messages:
    6,258
    Latest: Sharrow counterrotating propeller seems to have negative stagger and positive stagger Robert Biegler, Apr 19, 2024 at 3:01 PM
    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 5 of 25
Sort By:
Title Start Date
Replies Views
Last Message ↓
  1. Ol Gillnetter

    Keel Modification

    Ol Gillnetter, Jan 24, 2013 ... 2 3 4
    Replies:
    59
    Views:
    14,083
    Ol Gillnetter
    Aug 22, 2014
  2. Mr_CVT

    CVT transmission design by BitRaptor working only with spokets -high efficiency

    Mr_CVT, Jun 25, 2014
    Replies:
    6
    Views:
    5,587
    NoahWannabe
    Jun 28, 2014
  3. Paulc

    Compressed air battery/propulsion

    Paulc, Jun 15, 2014
    Replies:
    9
    Views:
    3,641
    Stumble
    Jun 18, 2014
  4. shuller1458

    Solar powered pontoon, question.

    shuller1458, May 29, 2014
    Replies:
    11
    Views:
    3,149
    Grey Ghost
    Jun 15, 2014
  5. rubenova

    Does anyone own a Yanmar Saildrive?

    rubenova, Jun 13, 2014
    Replies:
    2
    Views:
    2,550
    rubenova
    Jun 14, 2014
  6. ssawasare

    Blade material

    ssawasare, Jun 6, 2014
    Replies:
    1
    Views:
    1,967
    jehardiman
    Jun 6, 2014
  7. Ike

    Analyze This!

    Ike, May 30, 2014 ... 2
    Replies:
    17
    Views:
    3,822
    Petros
    Jun 2, 2014
  8. saltnz

    Alternatives in outboards

    saltnz, May 28, 2014
    Replies:
    9
    Views:
    3,086
    PAR
    Jun 1, 2014
  9. parkland

    Steam power

    parkland, Nov 6, 2013 ... 2 3
    Replies:
    39
    Views:
    7,763
    SamSam
    May 31, 2014
  10. nine mile

    Do hydrofoils work?

    nine mile, May 11, 2014
    Replies:
    6
    Views:
    2,741
    daiquiri
    May 14, 2014
  11. Kema

    Engine for 30 foot old and heavy ex fishing boat

    Kema, May 5, 2014
    Replies:
    5
    Views:
    2,960
    FAST FRED
    May 7, 2014
  12. Crocodile69

    An odd fix...

    Crocodile69, Apr 25, 2014
    Replies:
    6
    Views:
    2,876
    Crocodile69
    Apr 27, 2014
  13. MrLknowles2

    Homemade Outboard (Electric) - Help!

    MrLknowles2, Jul 26, 2012
    Replies:
    14
    Views:
    94,232
    boatindad
    Apr 25, 2014
  14. captainart

    Blackfin transom mounted rudders

    captainart, Apr 21, 2014
    Replies:
    0
    Views:
    5,200
    captainart
    Apr 21, 2014
  15. brian eiland

    Gas from Water, (WaterFuel), HHO technology

    brian eiland, May 15, 2006 ... 17 18 19
    Replies:
    278
    Views:
    71,437
    masrapido
    Apr 2, 2014
  16. lausl

    compact propulsion unit

    lausl, Mar 24, 2014
    Replies:
    6
    Views:
    3,132
    FAST FRED
    Mar 28, 2014
  17. QUICKNAVAL

    Propeller shaft and propeller diameter

    QUICKNAVAL, Mar 19, 2014
    Replies:
    6
    Views:
    15,395
    QUICKNAVAL
    Mar 22, 2014
  18. ssawasare

    safety factor for propeller in bollard astern condition

    ssawasare, Feb 20, 2014
    Replies:
    1
    Views:
    2,469
    jehardiman
    Feb 20, 2014
  19. mabdulhaq

    ASD vs conventional FPP propeller and rudders for 50+m AHTS tugboat

    mabdulhaq, Sep 23, 2010 ... 2
    Replies:
    28
    Views:
    14,333
    Michael23
    Feb 16, 2014
  20. Jet_Love

    4 Stroke Cleaner Than 2, Really?

    Jet_Love, Jun 17, 2013 ... 3 4 5
    Replies:
    60
    Views:
    11,854
    FAST FRED
    Feb 11, 2014
  21. SuenosAzules

    Thermal Imaging on Two Suzuki 115 HP Outboard Engines...

    SuenosAzules, Jan 29, 2014
    Replies:
    5
    Views:
    2,835
    Stumble
    Jan 29, 2014
  22. abohamza

    How can I select optimum boat propulsion system?

    abohamza, Apr 24, 2013
    Replies:
    11
    Views:
    3,384
    DaEdster
    Jan 7, 2014
  23. Saqa

    Looking for an inboard?

    Saqa, Dec 9, 2013
    Replies:
    5
    Views:
    2,417
    powerabout
    Dec 11, 2013
  24. DCockey

    Large Gas Engines - Different Directions

    DCockey, Nov 22, 2013
    Replies:
    8
    Views:
    3,105
    PAR
    Nov 25, 2013
  25. SailorDon

    Steam engine powered 40' cutter?

    SailorDon, Oct 17, 2013
    Replies:
    0
    Views:
    3,456
    SailorDon
    Oct 17, 2013
  26. tom kane

    Tunnel Rudders, Twin Rudders and similar.

    tom kane, Aug 30, 2013
    Replies:
    13
    Views:
    5,780
    tom kane
    Oct 6, 2013
  27. TSN13

    Have omc stringer 800 - should i upgrade to a volvo 280?

    TSN13, Jan 18, 2013
    Replies:
    4
    Views:
    3,718
    BMcF
    Sep 27, 2013
  28. Sundevil

    Most efficient hull design

    Sundevil, Sep 8, 2013
    Replies:
    8
    Views:
    14,341
    philSweet
    Sep 19, 2013
  29. honda600js

    engine swap 2.3 OMC

    honda600js, Aug 7, 2013
    Replies:
    1
    Views:
    4,083
    IMP-ish
    Aug 20, 2013
  30. tom kane

    Big power V8 mud Boat drive.

    tom kane, Aug 14, 2013
    Replies:
    3
    Views:
    5,299
    wildwatson
    Aug 20, 2013
  31. TheCapt

    propulsion for pontoon deck boat

    TheCapt, Jul 28, 2013
    Replies:
    0
    Views:
    2,282
    TheCapt
    Jul 28, 2013
  32. YotaTruck

    Multiple trolling motors for electric only lakes?

    YotaTruck, Jul 22, 2013
    Replies:
    4
    Views:
    12,401
    PAR
    Jul 24, 2013
  33. CatBuilder

    Ganging Outboards - Does it work?

    CatBuilder, Jan 14, 2012 ... 11 12 13
    Replies:
    183
    Views:
    36,598
    DCockey
    Jul 19, 2013
  34. Wayne Kendall

    Universal joints & thrust bearings

    Wayne Kendall, Jun 30, 2013
    Replies:
    4
    Views:
    5,258
    FAST FRED
    Jul 2, 2013
  35. Wayne Kendall

    steady bearing clearance

    Wayne Kendall, Jul 1, 2013
    Replies:
    1
    Views:
    2,294
    daiquiri
    Jul 1, 2013
  36. ThrottleBack

    Trolling motor placement help

    ThrottleBack, Jun 22, 2013
    Replies:
    5
    Views:
    2,750
    PAR
    Jul 1, 2013
  37. lausl

    Recuperation of energy while sailing

    lausl, Oct 4, 2012
    Replies:
    12
    Views:
    3,382
    alan white
    Jun 27, 2013
  38. tom kane

    Very simple motor hook up.

    tom kane, Jun 25, 2013
    Replies:
    7
    Views:
    3,095
    whitepointer23
    Jun 27, 2013
  39. mitul_09

    Dfde

    mitul_09, Jun 21, 2013
    Replies:
    2
    Views:
    1,901
    mitul_09
    Jun 24, 2013
  40. rwatson

    Power Storage in a wobbly flywheel

    rwatson, May 28, 2013
    Replies:
    10
    Views:
    3,527
    gonzo
    May 30, 2013
Showing threads 161 to 200 of 977

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