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Forum Home: Marine Power Engine Forum

  1. need to know what alternator

    Started by boatingfun1, 01-21-2023 05:08 PM
    4 Attachment(s)
    • Replies: 1
    • Views: 825
    makomark
    01-22-2023, 02:55 PM Go to last post

  2. 2013 350 Mag SmartCraft Tach Not Working

    Started by BILLYSKIS, 10-27-2022 04:54 PM
    • Replies: 2
    • Views: 954
    BILLYSKIS
    10-28-2022, 09:39 AM Go to last post

  3. Re-powering a 1964 Shepperd 26 foot cruiser

    Started by CopperSunshine1964, 08-15-2022 11:34 AM
    • Replies: 4
    • Views: 761
    o2batsea
    08-15-2022, 07:38 PM Go to last post

  4. Question 350 Mercruiser straight inboard overheating

    Started by clob934, 08-11-2022 09:16 AM
    • Replies: 8
    • Views: 487
    clob934
    08-15-2022, 08:30 AM Go to last post

  5. 454.7.4 marine power inboard question

    Started by walter g, 06-13-2022 08:39 PM
    • Replies: 1
    • Views: 712
    timguy
    06-15-2022, 12:11 PM Go to last post

  6. 454.7.4 marine power inboard

    Started by walter g, 06-13-2022 08:36 PM
    • Replies: 0
    • Views: 331
    walter g
    06-13-2022, 08:36 PM Go to last post

  7. 1994 Mercury Mariner 3 cylinder

    Started by Hawk1964, 11-17-2021 10:27 AM
    • Replies: 1
    • Views: 1,208
    makomark
    11-18-2021, 02:54 PM Go to last post

  8. 1981 colbolt with a mercruiser 228 fresh water cooled engine

    Started by Buckeye700179, 08-31-2021 06:46 PM
    • Replies: 1
    • Views: 801
    makomark
    09-01-2021, 07:33 AM Go to last post

  9. Merc Carb Adjustment

    Started by DWester, 08-23-2021 11:44 AM
    1 Attachment(s)
    • Replies: 5
    • Views: 719
    sandkicker
    08-31-2021, 10:50 AM Go to last post

  10. 2000 Marine Power 454 7.4L starting problem

    Started by higaredar, 08-26-2021 04:38 PM
    • Replies: 4
    • Views: 639
    higaredar
    08-27-2021, 07:31 PM Go to last post

  11. Mercruiser 5.0 Thunderbolt Died

    Started by Dave Bramow, 08-02-2021 08:51 AM
    • Replies: 1
    • Views: 627
    makomark
    08-02-2021, 04:32 PM Go to last post

  12. who sells replacement MEFI 5 ECM's?

    Started by stang32, 07-31-2021 07:38 AM
    • Replies: 1
    • Views: 492
    makomark
    07-31-2021, 02:49 PM Go to last post

  13. Default HELP in finding a short causing no start to diesel

    Started by hapibeli, 07-20-2021 01:26 AM
    • Replies: 6
    • Views: 906
    hapibeli
    07-22-2021, 12:34 PM Go to last post

  14. Mercruiser Mag 350 MPI, MEFI 3 help please

    Started by aztige, 07-12-2021 11:41 AM
    • Replies: 2
    • Views: 605
    Docksidemarineservices
    07-13-2021, 08:06 AM Go to last post

  15. Gm 5.7 backfires and pops

    Started by boatingfun1, 06-27-2021 08:01 AM
    • Replies: 9
    • Views: 997
    Dieter
    07-04-2021, 06:52 AM Go to last post

  16. marine power 340HP no communication with ECM detected on scanner and dash

    Started by stang32, 06-22-2021 07:22 AM
    • Replies: 1
    • Views: 545
    makomark
    06-26-2021, 11:00 AM Go to last post

  17. marine power 340HP wiring diagram and DLC connector location needed 2008, MEFI

    Started by stang32, 06-19-2021 11:30 AM
    • Replies: 2
    • Views: 580
    stang32
    06-21-2021, 07:49 AM Go to last post

  18. Info on 2007 3.0L inboard

    Started by sandkicker, 06-15-2021 11:00 AM
    2 Attachment(s)
    • Replies: 2
    • Views: 596
    sandkicker
    06-15-2021, 05:38 PM Go to last post

  19. MP 340 Harmonic Balancer wobble

    Started by ColoradoGuy, 05-27-2021 05:05 PM
    • Replies: 1
    • Views: 569
    makomark
    05-28-2021, 09:23 AM Go to last post

  20. 5.7 L GM v-8 dies after it warms up or under load

    Started by Bulldog555, 04-28-2021 12:46 AM
    • Replies: 1
    • Views: 861
    bondo
    04-28-2021, 05:40 AM Go to last post

  21. Inoperable Tach Gauge on 05 NW Jet Boat

    Started by JReich2609, 04-18-2021 08:19 PM
    • Replies: 1
    • Views: 580
    makomark
    04-19-2021, 03:40 PM Go to last post

  22. Help verify engine please

    Started by boatingfun1, 10-28-2020 09:03 AM
    7 Attachment(s)
    • Replies: 29
    • Views: 4,215
    boatingfun1
    04-13-2021, 02:56 PM Go to last post

  23. Eco question

    Started by Rico25, 02-18-2021 10:09 AM
    • Replies: 2
    • Views: 1,063
    Dieter
    02-19-2021, 08:47 PM Go to last post

  24. Please help with Holly carb kit

    Started by boatingfun1, 02-14-2021 12:15 PM
    • Replies: 2
    • Views: 683
    o2batsea
    02-14-2021, 05:03 PM Go to last post

  25. 2019 5.7 MPI misfire issue

    Started by mhf2467, 12-25-2020 11:09 AM
    • Replies: 0
    • Views: 1,078
    mhf2467
    12-25-2020, 11:09 AM Go to last post

  26. 1994 Mainship 7.4 TBI

    Started by JacksMainship, 12-08-2020 06:16 PM
    • Replies: 5
    • Views: 1,144
    timguy
    12-14-2020, 03:37 PM Go to last post

  27. 454 rebuild 330 hp

    Started by Pachanga1224, 12-03-2020 05:51 PM
    • Replies: 3
    • Views: 1,195
    o2batsea
    12-04-2020, 12:31 PM Go to last post

  28. repowering a 120hp mercruiser with 2006 3.0 mercruiser help.

    Started by bucktoenges, 10-18-2020 11:59 AM
    • Replies: 1
    • Views: 1,564
    Dieter
    11-15-2020, 11:19 AM Go to last post

  29. Question Chevy 350 fuel cooler question....Mystery barb...

    Started by PNWBoater, 10-09-2020 10:59 PM
    • Replies: 1
    • Views: 1,739
    makomark
    10-13-2020, 10:04 AM Go to last post

  30. Question Mercruiser GM 5.7l TBI, shift switch help....

    Started by PNWBoater, 10-09-2020 10:45 PM
    5 Attachment(s)
    • Replies: 0
    • Views: 1,163
    PNWBoater
    10-09-2020, 10:45 PM Go to last post

  31. Wiring harness plug diagram

    Started by patfrank, 07-07-2020 07:52 PM
    • Replies: 5
    • Views: 4,335
    co2hv
    09-22-2020, 10:28 AM Go to last post

  32. 1995 Mercruiser 350 Magnum Tournament Ski EFI: Throttle Body cleaner OK?

    Started by pwskicat, 07-08-2020 02:49 PM
    • Replies: 0
    • Views: 2,405
    pwskicat
    07-08-2020, 02:49 PM Go to last post

  33. Question GM 5.7L , SB350ci DISTRIBUTOR CONVERSION INFO NEEDED

    Started by POLECAT13, 07-03-2020 04:59 PM
    • Replies: 4
    • Views: 1,819
    bondo
    07-04-2020, 09:37 PM Go to last post

  34. Year maintenance for longevity

    Started by Dlobb333, 06-25-2020 01:07 AM
    • Replies: 1
    • Views: 2,070
    RicardoMarine
    06-25-2020, 09:04 AM Go to last post

  35. Throttle loss of power

    Started by Dlobb333, 06-20-2020 07:06 PM
    • Replies: 1
    • Views: 1,665
    bondo
    06-21-2020, 07:38 AM Go to last post

  36. firing order- 1999 502 mag

    Started by Lowbilly, 05-21-2020 08:04 AM
    • Replies: 1
    • Views: 2,041
    RicardoMarine
    05-22-2020, 07:23 AM Go to last post

  37. Talking Mercruiser 5.0 MPI stalling and clinking!

    Started by jason1836, 05-15-2020 09:10 AM
    • Replies: 0
    • Views: 1,795
    jason1836
    05-15-2020, 09:10 AM Go to last post

  38. Merc horizon. 7.4 mag mpi. Idling to high

    Started by Skipper2019, 05-03-2020 10:35 PM
    • Replies: 1
    • Views: 2,645
    Docksidemarineservices
    05-03-2020, 11:38 PM Go to last post

  39. Question on 350 sbc omc 800 build

    Started by Priesman64, 08-06-2019 11:52 PM
    1 Attachment(s)
    • Replies: 5
    • Views: 8,737
    RicardoMarine
    04-16-2020, 07:50 AM Go to last post

  40. carbrated 5.7 mercuriser alpha 1 drive

    Started by Chris Bryson, 09-22-2019 08:14 PM
    • Replies: 4
    • Views: 7,311
    bondo
    04-15-2020, 07:12 PM Go to last post

  41. Raw water pump corrosion

    Started by Mariner 88, 10-02-2019 05:08 PM
    • Replies: 2
    • Views: 10,355
    mcomm
    04-15-2020, 03:26 PM Go to last post

  42. temp gauge

    Started by lunkerdo, 05-22-2011 05:23 PM
    • Replies: 9
    • Views: 4,633
    mcomm
    04-15-2020, 03:25 PM Go to last post

  43. 1986 Mercruiser 140 fuel filter

    Started by Planodave, 03-18-2020 11:47 PM
    • Replies: 3
    • Views: 2,368
    makomark
    03-23-2020, 11:55 AM Go to last post

  44. 4.3 mercruiser

    Started by Tyler1992, 02-22-2020 08:15 AM
    • Replies: 1
    • Views: 4,183
    bondo
    02-22-2020, 08:38 AM Go to last post

  45. 115 HP 1984 Mariner Inline 6 - How many cc?

    Started by remusvalean, 02-18-2020 01:06 PM
    1 Attachment(s)
    • Replies: 1
    • Views: 2,180
    racerone
    02-18-2020, 02:55 PM Go to last post

  46. Unsteady Idle

    Started by alparmer, 09-18-2019 01:39 PM
    • Replies: 2
    • Views: 6,135
    alparmer
    09-18-2019, 04:47 PM Go to last post

  47. Loss of Power

    Started by mhf2467, 09-13-2019 08:43 AM
    • Replies: 1
    • Views: 6,107
    makomark
    09-15-2019, 03:51 PM Go to last post

  48. 454 timing

    Started by Andrew33764, 07-31-2019 11:42 AM
    • Replies: 5
    • Views: 8,228
    makomark
    08-03-2019, 04:55 PM Go to last post

  49. fuel pump Carter 152-875

    Started by Bob Morton, 07-21-2019 01:39 PM
    • Replies: 3
    • Views: 14,658
    Bt Doctur
    07-21-2019, 02:28 PM Go to last post

  50. Canadian compliance sticker ENGINE RATING

    Started by Boater123456, 07-14-2019 05:30 PM
    • Replies: 1
    • Views: 7,372
    makomark
    07-15-2019, 02:33 PM Go to last post
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