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  1. 1994 Mercury Mariner 3 cylinder

    Started by Hawk1964, 11-17-2021 11:27 AM
    • Replies: 1
    • Views: 52
    11-18-2021, 03:54 PM Go to last post
    • Replies: 1
    • Views: 384
    09-01-2021, 08:33 AM Go to last post
  2. Merc Carb Adjustment

    Started by DWester, 08-23-2021 12:44 PM
    • Replies: 5
    • Views: 167
    08-31-2021, 11:50 AM Go to last post
  3. 2000 Marine Power 454 7.4L starting problem

    Started by higaredar, 08-26-2021 05:38 PM
    • Replies: 4
    • Views: 127
    08-27-2021, 08:31 PM Go to last post
  4. Mercruiser 5.0 Thunderbolt Died

    Started by Dave Bramow, 08-02-2021 09:51 AM
    • Replies: 1
    • Views: 175
    08-02-2021, 05:32 PM Go to last post
  5. who sells replacement MEFI 5 ECM's?

    Started by stang32, 07-31-2021 08:38 AM
    • Replies: 1
    • Views: 106
    07-31-2021, 03:49 PM Go to last post
    • Replies: 6
    • Views: 253
    07-22-2021, 01:34 PM Go to last post
  6. Mercruiser Mag 350 MPI, MEFI 3 help please

    Started by aztige, 07-12-2021 12:41 PM
    • Replies: 2
    • Views: 168
    07-13-2021, 09:06 AM Go to last post
  7. Gm 5.7 backfires and pops

    Started by boatingfun1, 06-27-2021 09:01 AM
    • Replies: 9
    • Views: 326
    07-04-2021, 07:52 AM Go to last post
    • Replies: 1
    • Views: 122
    06-26-2021, 12:00 PM Go to last post
  8. Info on 2007 3.0L inboard

    Started by sandkicker, 06-15-2021 12:00 PM
    • Replies: 2
    • Views: 146
    06-15-2021, 06:38 PM Go to last post
  9. MP 340 Harmonic Balancer wobble

    Started by ColoradoGuy, 05-27-2021 06:05 PM
    • Replies: 1
    • Views: 219
    05-28-2021, 10:23 AM Go to last post
    • Replies: 1
    • Views: 427
    04-28-2021, 06:40 AM Go to last post
  10. Inoperable Tach Gauge on 05 NW Jet Boat

    Started by JReich2609, 04-18-2021 09:19 PM
    • Replies: 1
    • Views: 212
    04-19-2021, 04:40 PM Go to last post
  11. Help verify engine please

    Started by boatingfun1, 10-28-2020 10:03 AM
    • Replies: 29
    • Views: 2,521
    04-13-2021, 03:56 PM Go to last post
  12. Eco question

    Started by Rico25, 02-18-2021 11:09 AM
    • Replies: 2
    • Views: 575
    02-19-2021, 09:47 PM Go to last post
  13. Please help with Holly carb kit

    Started by boatingfun1, 02-14-2021 01:15 PM
    • Replies: 2
    • Views: 272
    02-14-2021, 06:03 PM Go to last post
  14. 2019 5.7 MPI misfire issue

    Started by mhf2467, 12-25-2020 12:09 PM
    • Replies: 0
    • Views: 569
    12-25-2020, 12:09 PM Go to last post
  15. 1994 Mainship 7.4 TBI

    Started by JacksMainship, 12-08-2020 07:16 PM
    • Replies: 5
    • Views: 613
    12-14-2020, 04:37 PM Go to last post
  16. 454 rebuild 330 hp

    Started by Pachanga1224, 12-03-2020 06:51 PM
    • Replies: 3
    • Views: 617
    12-04-2020, 01:31 PM Go to last post
    • Replies: 1
    • Views: 1,065
    11-15-2020, 12:19 PM Go to last post
    • Replies: 1
    • Views: 1,018
    10-13-2020, 11:04 AM Go to last post
  17. Question Mercruiser GM 5.7l TBI, shift switch help....

    Started by PNWBoater, 10-09-2020 11:45 PM
    • Replies: 0
    • Views: 699
    10-09-2020, 11:45 PM Go to last post
  18. Wiring harness plug diagram

    Started by patfrank, 07-07-2020 08:52 PM
    • Replies: 5
    • Views: 2,475
    09-22-2020, 11:28 AM Go to last post
    • Replies: 0
    • Views: 1,544
    07-08-2020, 03:49 PM Go to last post
    • Replies: 4
    • Views: 1,308
    07-04-2020, 10:37 PM Go to last post
  19. Year maintenance for longevity

    Started by Dlobb333, 06-25-2020 02:07 AM
    • Replies: 1
    • Views: 1,413
    06-25-2020, 10:04 AM Go to last post
  20. Throttle loss of power

    Started by Dlobb333, 06-20-2020 08:06 PM
    • Replies: 1
    • Views: 1,263
    06-21-2020, 08:38 AM Go to last post
  21. firing order- 1999 502 mag

    Started by Lowbilly, 05-21-2020 09:04 AM
    • Replies: 1
    • Views: 1,466
    05-22-2020, 08:23 AM Go to last post
  22. Talking Mercruiser 5.0 MPI stalling and clinking!

    Started by jason1836, 05-15-2020 10:10 AM
    • Replies: 0
    • Views: 1,384
    05-15-2020, 10:10 AM Go to last post
  23. Merc horizon. 7.4 mag mpi. Idling to high

    Started by Skipper2019, 05-03-2020 11:35 PM
    • Replies: 1
    • Views: 1,799
    05-04-2020, 12:38 AM Go to last post
  24. Question on 350 sbc omc 800 build

    Started by Priesman64, 08-07-2019 12:52 AM
    • Replies: 5
    • Views: 5,357
    04-16-2020, 08:50 AM Go to last post
  25. carbrated 5.7 mercuriser alpha 1 drive

    Started by Chris Bryson, 09-22-2019 09:14 PM
    • Replies: 4
    • Views: 4,366
    04-15-2020, 08:12 PM Go to last post
  26. Raw water pump corrosion

    Started by Mariner 88, 10-02-2019 06:08 PM
    • Replies: 2
    • Views: 6,184
    04-15-2020, 04:26 PM Go to last post
  27. temp gauge

    Started by lunkerdo, 05-22-2011 06:23 PM
    • Replies: 9
    • Views: 3,284
    04-15-2020, 04:25 PM Go to last post
  28. 1986 Mercruiser 140 fuel filter

    Started by Planodave, 03-19-2020 12:47 AM
    • Replies: 3
    • Views: 1,876
    03-23-2020, 12:55 PM Go to last post
  29. 4.3 mercruiser

    Started by Tyler1992, 02-22-2020 09:15 AM
    • Replies: 1
    • Views: 2,634
    02-22-2020, 09:38 AM Go to last post
  30. 115 HP 1984 Mariner Inline 6 - How many cc?

    Started by remusvalean, 02-18-2020 02:06 PM
    • Replies: 1
    • Views: 1,781
    02-18-2020, 03:55 PM Go to last post
  31. Unsteady Idle

    Started by alparmer, 09-18-2019 02:39 PM
    • Replies: 2
    • Views: 3,831
    09-18-2019, 05:47 PM Go to last post
  32. Loss of Power

    Started by mhf2467, 09-13-2019 09:43 AM
    • Replies: 1
    • Views: 3,816
    09-15-2019, 04:51 PM Go to last post
  33. 454 timing

    Started by Andrew33764, 07-31-2019 12:42 PM
    • Replies: 5
    • Views: 4,851
    08-03-2019, 05:55 PM Go to last post
  34. fuel pump Carter 152-875

    Started by Bob Morton, 07-21-2019 02:39 PM
    • Replies: 3
    • Views: 9,484
    07-21-2019, 03:28 PM Go to last post
  35. Canadian compliance sticker ENGINE RATING

    Started by Boater123456, 07-14-2019 06:30 PM
    • Replies: 1
    • Views: 4,459
    07-15-2019, 03:33 PM Go to last post
    • Replies: 2
    • Views: 5,107
    07-10-2019, 11:44 AM Go to last post
  36. Rebuilt engine wont start

    Started by mhf2467, 07-07-2019 07:48 AM
    • Replies: 3
    • Views: 4,454
    07-07-2019, 11:29 AM Go to last post
  37. Cap

    Started by bcclew, 06-29-2019 09:38 AM
    • Replies: 2
    • Views: 4,441
    07-01-2019, 10:51 AM Go to last post
    • Replies: 11
    • Views: 5,051
    06-26-2019, 10:31 AM Go to last post
  38. Fuel Regulator Questions

    Started by tparsons56, 06-12-2019 05:30 PM
    • Replies: 4
    • Views: 5,067
    06-13-2019, 03:11 PM Go to last post
  39. Question 2002 5.0 MPI Fuel Problem.

    Started by Detex1, 06-09-2019 11:38 AM
    • Replies: 1
    • Views: 4,310
    06-10-2019, 05:02 PM Go to last post

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