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Forum: Four Stroke and Direct Injected Two Stroke Engines

Low-emissions outboard engines.

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  1. Sticky Thread Sticky: ECDBA Emission performance stock.....

    Started by E-tec1, 11-09-2008 11:30 AM
    3 Pages •
    1 2 3
    1 Attachment(s)
    • Replies: 37
    • Views: 78,447
    cmn
    06-28-2015, 03:01 PM Go to last post

  1. Hydro-tec tuner for 300xs ?

    Started by LOSTINJ, 10-30-2022 08:08 AM
    • Replies: 3
    • Views: 1,820
    carstenmcinnes
    01-07-2026, 01:32 PM Go to last post

  2. 225 Optimax Pro XS performance.

    Started by Bassfisher360, 11-24-2024 09:19 AM
    • Replies: 12
    • Views: 8,101
    carstenmcinnes
    01-07-2026, 12:41 PM Go to last post

  3. L6 Verado 300pro upgrades

    Started by Loxboy1, 11-20-2025 08:33 PM
    • Replies: 1
    • Views: 1,692
    MJPfin
    12-28-2025, 01:57 AM Go to last post

  4. DFI or 4strk, best torque & acceleration

    Started by billybob, 09-25-2025 12:32 PM
    2 Pages •
    1 2
    5 Attachment(s)
    • Replies: 24
    • Views: 9,551
    David - WI
    11-20-2025, 08:56 PM Go to last post

  5. 250HO's gearcase

    Started by kostas74, 04-22-2011 03:37 PM
    3 Pages •
    1 2 3
    • Replies: 33
    • Views: 9,983
    RIDEAU WARRIER
    11-13-2025, 05:02 PM Go to last post

  6. Going Drag Racing with an eTec 150

    Started by Sam Baker, 08-17-2009 03:10 PM
    6 Pages •
    1 2 3 4 5 6
    7 Attachment(s)
    • Replies: 88
    • Views: 27,866
    Jacob
    10-27-2025, 12:47 PM Go to last post

  7. How often do you guys set your valve lash?

    Started by pcrussell50, 08-03-2025 01:06 AM
    1 Attachment(s)
    • Replies: 10
    • Views: 3,990
    aj06bolt12r
    09-25-2025, 07:47 AM Go to last post

  8. ETEC 250HO issue and questions

    Started by cameronj, 08-01-2025 12:53 PM
    • Replies: 1
    • Views: 1,205
    cameronj
    08-03-2025, 11:21 AM Go to last post

  9. Mercury 60 4S

    Started by slowJEEP, 02-02-2023 02:23 PM
    3 Pages •
    1 2 3
    2 Attachment(s)
    • Replies: 32
    • Views: 8,815
    prosken300
    06-19-2025, 01:13 PM Go to last post

  10. 2005 Merc 300x rebuild

    Started by Mbenji01, 01-16-2025 08:54 PM
    • Replies: 2
    • Views: 2,211
    justthetip
    06-16-2025, 06:50 AM Go to last post

  11. Best place to purchase a new Merc outboard?

    Started by Tamalewagon, 02-18-2025 08:33 PM
    • Replies: 4
    • Views: 3,917
    LOSTINJ
    06-13-2025, 11:01 PM Go to last post

  12. Mercury 3L EGT individual cylinder egt

    Started by Amatuer, 04-12-2025 11:44 PM
    1 Attachment(s)
    • Replies: 2
    • Views: 2,117
    LOSTINJ
    06-12-2025, 10:22 PM Go to last post

  13. Code 4602-23

    Started by Toffen, 05-24-2025 03:00 PM
    • Replies: 5
    • Views: 2,465
    Toffen
    06-01-2025, 03:33 PM Go to last post

  14. 300xs Overheat

    Started by Mr. Jones, 05-18-2025 08:14 PM
    • Replies: 4
    • Views: 2,597
    David - WI
    05-28-2025, 02:18 PM Go to last post

  15. 150 optimax rough/unstable idle, stalls when shifting into gear. Runs ok above idle

    Started by Michsnet, 04-22-2025 12:52 PM
    1 Attachment(s)
    • Replies: 0
    • Views: 2,197
    Michsnet
    04-22-2025, 12:52 PM Go to last post

  16. 300XS alternator problems

    Started by JR IN JAX, 10-15-2024 06:49 PM
    • Replies: 4
    • Views: 2,782
    mr fun
    04-09-2025, 02:13 PM Go to last post

  17. Optimax Air Injectors

    Started by clayc, 07-15-2022 11:03 AM
    4 Pages •
    1 2 3 4
    • Replies: 50
    • Views: 15,190
    Bassfisher360
    02-07-2025, 04:23 PM Go to last post

  18. Older Optimax 150

    Started by Glastron1987, 12-29-2024 07:27 PM
    • Replies: 5
    • Views: 2,448
    FMP
    01-04-2025, 12:39 PM Go to last post

  19. Anyone running a Brp 3 cyl 150?

    Started by powerabout, 08-18-2024 08:27 PM
    • Replies: 4
    • Views: 2,253
    josh7_78
    01-02-2025, 05:17 PM Go to last post

  20. Optimax 150 feedback wanted…

    Started by Euroski, 09-22-2024 10:40 AM
    • Replies: 1
    • Views: 1,825
    Bassfisher360
    11-24-2024, 09:17 AM Go to last post

  21. Fastest 4 stroke 40hp?

    Started by yakfish, 09-08-2024 05:01 PM
    • Replies: 0
    • Views: 1,711
    yakfish
    09-08-2024, 05:01 PM Go to last post

  22. 1993 XRi 200hp no fuel to cylinders

    Started by Vieacinq, 08-16-2024 07:34 AM
    2 Pages •
    1 2
    4 Attachment(s)
    • Replies: 15
    • Views: 5,011
    tlwjkw
    08-24-2024, 05:37 AM Go to last post

  23. Looking to pair a fishing boat with my 2003 ProXS 250 -

    Started by Fstarockr, 08-19-2024 10:15 AM
    • Replies: 1
    • Views: 1,982
    aj06bolt12r
    08-19-2024, 02:06 PM Go to last post

  24. Optimax: What to do after being submerged

    Started by Kevin Turner, 06-08-2024 06:06 PM
    • Replies: 8
    • Views: 4,498
    2us70
    06-18-2024, 11:42 AM Go to last post

  25. Yamaha SHO Solid mounts and lower unit mods

    Started by xb03fs, 02-18-2015 08:32 AM
    2 Pages •
    1 2
    • Replies: 16
    • Views: 6,259
    GETBOATS
    05-31-2024, 03:03 PM Go to last post

  26. Anyone make oversized pistons for a Suzuki DF 150 4t

    Started by ratman67, 05-11-2024 10:23 PM
    • Replies: 4
    • Views: 2,090
    rock
    05-13-2024, 07:55 AM Go to last post

  27. 25 Tohatsu

    Started by Thumper121671, 05-09-2024 04:16 PM
    • Replies: 0
    • Views: 1,674
    Thumper121671
    05-09-2024, 04:16 PM Go to last post

  28. Optimax Air Injector Connector

    Started by MadMat, 04-27-2024 03:16 AM
    2 Attachment(s)
    • Replies: 2
    • Views: 2,540
    4Speed
    05-04-2024, 05:34 PM Go to last post

  29. Mercury Racing Verado L4 200

    Started by Han, 03-18-2024 12:52 AM
    • Replies: 4
    • Views: 2,545
    HydroSkreamin
    04-11-2024, 03:22 PM Go to last post

  30. Mercury Marine ECU repair

    Started by Simon, 03-14-2024 04:17 PM
    • Replies: 3
    • Views: 3,194
    PaulR
    03-18-2024, 01:28 PM Go to last post

  31. Hpdi medium pressure fuel filter alternative

    Started by foodie, 10-07-2023 05:26 AM
    • Replies: 1
    • Views: 2,061
    Robert
    02-15-2024, 09:24 AM Go to last post

  32. Mercury Dominates Big OB 4 Stroke Market

    Started by WaterZebra, 07-03-2023 10:21 PM
    1 Attachment(s)
    • Replies: 9
    • Views: 4,189
    NICE PAIR
    01-28-2024, 03:13 PM Go to last post

  33. I think Mercury Racing should make this!

    Started by Scream And Fly, 01-14-2024 08:17 AM
    1 Attachment(s)
    • Replies: 3
    • Views: 3,047
    mragu
    01-14-2024, 08:03 PM Go to last post

  34. *** SPY PHOTOS*** ETEC Drag

    Started by FlowMaxx, 06-07-2010 07:02 PM
    57 Pages •
    1 2 3 4 5 6 7 8 9 10 ... 57
    47 Attachment(s)
    • Replies: 847
    • Views: 234,885
    wicheckmate
    01-11-2024, 09:47 PM Go to last post

  35. BRP E Tec 250

    Started by Boosting, 11-02-2023 03:53 PM
    • Replies: 2
    • Views: 2,856
    idvette
    12-31-2023, 08:30 AM Go to last post

  36. Yamaha HPDI ECU Mods

    Started by lance, 03-04-2013 10:13 AM
    3 Pages •
    1 2 3
    3 Attachment(s)
    • Replies: 38
    • Views: 24,914
    Yamaha 225
    11-23-2023, 10:10 PM Go to last post

  37. Optimax Fuel Rail

    Started by lowedown, 11-17-2023 05:34 PM
    • Replies: 4
    • Views: 2,457
    InjectorService
    11-20-2023, 11:47 AM Go to last post

  38. Honda V8 350 HP

    Started by WaterZebra, 11-16-2023 11:04 AM
    • Replies: 0
    • Views: 1,972
    WaterZebra
    11-16-2023, 11:04 AM Go to last post

  39. If your XS suddenly becomes sick and won't get on a plane or go above 2500 RPM....

    Started by JR IN JAX, 11-14-2023 09:08 AM
    • Replies: 4
    • Views: 3,192
    bouyhead
    11-15-2023, 08:33 PM Go to last post

  40. Merc 300/450 air vents

    Started by Hebert519, 08-09-2023 03:25 PM
    2 Pages •
    1 2
    4 Attachment(s)
    • Replies: 17
    • Views: 10,949
    Beak Boater
    11-08-2023, 05:29 PM Go to last post
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