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  1. Inoperable Tach Gauge on 05 NW Jet Boat

    Started by JReich2609, 04-18-2021 08:19 PM
    • Replies: 1
    • Views: 25
    04-19-2021, 03:40 PM Go to last post
  2. Help verify engine please

    Started by boatingfun1, 10-28-2020 09:03 AM
    • Replies: 29
    • Views: 1,308
    04-13-2021, 02:56 PM Go to last post
  3. Eco question

    Started by Rico25, 02-18-2021 10:09 AM
    • Replies: 2
    • Views: 381
    02-19-2021, 08:47 PM Go to last post
  4. Please help with Holly carb kit

    Started by boatingfun1, 02-14-2021 12:15 PM
    • Replies: 2
    • Views: 110
    02-14-2021, 05:03 PM Go to last post
    • Replies: 2
    • Views: 861
    02-05-2021, 05:49 PM Go to last post
  5. 2019 5.7 MPI misfire issue

    Started by mhf2467, 12-25-2020 11:09 AM
    • Replies: 0
    • Views: 365
    12-25-2020, 11:09 AM Go to last post
  6. 1994 Mainship 7.4 TBI

    Started by JacksMainship, 12-08-2020 06:16 PM
    • Replies: 5
    • Views: 403
    12-14-2020, 03:37 PM Go to last post
  7. 454 rebuild 330 hp

    Started by Pachanga1224, 12-03-2020 05:51 PM
    • Replies: 3
    • Views: 345
    12-04-2020, 12:31 PM Go to last post
    • Replies: 1
    • Views: 725
    10-13-2020, 10:04 AM Go to last post
  8. Question Mercruiser GM 5.7l TBI, shift switch help....

    Started by PNWBoater, 10-09-2020 10:45 PM
    • Replies: 0
    • Views: 551
    10-09-2020, 10:45 PM Go to last post
  9. Wiring harness plug diagram

    Started by patfrank, 07-07-2020 07:52 PM
    • Replies: 5
    • Views: 1,617
    09-22-2020, 10:28 AM Go to last post
    • Replies: 0
    • Views: 1,152
    07-08-2020, 02:49 PM Go to last post
    • Replies: 4
    • Views: 1,102
    07-04-2020, 09:37 PM Go to last post
  10. Year maintenance for longevity

    Started by Dlobb333, 06-25-2020 01:07 AM
    • Replies: 1
    • Views: 1,147
    06-25-2020, 09:04 AM Go to last post
  11. Throttle loss of power

    Started by Dlobb333, 06-20-2020 07:06 PM
    • Replies: 1
    • Views: 1,111
    06-21-2020, 07:38 AM Go to last post
  12. firing order- 1999 502 mag

    Started by Lowbilly, 05-21-2020 08:04 AM
    • Replies: 1
    • Views: 1,307
    05-22-2020, 07:23 AM Go to last post
  13. Talking Mercruiser 5.0 MPI stalling and clinking!

    Started by jason1836, 05-15-2020 09:10 AM
    • Replies: 0
    • Views: 1,253
    05-15-2020, 09:10 AM Go to last post
  14. Merc horizon. 7.4 mag mpi. Idling to high

    Started by Skipper2019, 05-03-2020 10:35 PM
    • Replies: 1
    • Views: 1,436
    05-03-2020, 11:38 PM Go to last post
  15. Question on 350 sbc omc 800 build

    Started by Priesman64, 08-06-2019 11:52 PM
    • Replies: 5
    • Views: 3,572
    04-16-2020, 07:50 AM Go to last post
  16. carbrated 5.7 mercuriser alpha 1 drive

    Started by Chris Bryson, 09-22-2019 08:14 PM
    • Replies: 4
    • Views: 2,959
    04-15-2020, 07:12 PM Go to last post
  17. Raw water pump corrosion

    Started by Mariner 88, 10-02-2019 05:08 PM
    • Replies: 2
    • Views: 4,133
    04-15-2020, 03:26 PM Go to last post
  18. temp gauge

    Started by lunkerdo, 05-22-2011 05:23 PM
    • Replies: 9
    • Views: 2,676
    04-15-2020, 03:25 PM Go to last post
  19. 1986 Mercruiser 140 fuel filter

    Started by Planodave, 03-18-2020 11:47 PM
    • Replies: 3
    • Views: 1,651
    03-23-2020, 11:55 AM Go to last post
  20. 4.3 mercruiser

    Started by Tyler1992, 02-22-2020 08:15 AM
    • Replies: 1
    • Views: 1,933
    02-22-2020, 08:38 AM Go to last post
  21. 115 HP 1984 Mariner Inline 6 - How many cc?

    Started by remusvalean, 02-18-2020 01:06 PM
    • Replies: 1
    • Views: 1,631
    02-18-2020, 02:55 PM Go to last post
  22. Unsteady Idle

    Started by alparmer, 09-18-2019 01:39 PM
    • Replies: 2
    • Views: 2,700
    09-18-2019, 04:47 PM Go to last post
  23. Loss of Power

    Started by mhf2467, 09-13-2019 08:43 AM
    • Replies: 1
    • Views: 2,705
    09-15-2019, 03:51 PM Go to last post
  24. 454 timing

    Started by Andrew33764, 07-31-2019 11:42 AM
    • Replies: 5
    • Views: 3,208
    08-03-2019, 04:55 PM Go to last post
  25. fuel pump Carter 152-875

    Started by Bob Morton, 07-21-2019 01:39 PM
    • Replies: 3
    • Views: 6,647
    07-21-2019, 02:28 PM Go to last post
  26. Canadian compliance sticker ENGINE RATING

    Started by Boater123456, 07-14-2019 05:30 PM
    • Replies: 1
    • Views: 3,080
    07-15-2019, 02:33 PM Go to last post
    • Replies: 2
    • Views: 3,462
    07-10-2019, 10:44 AM Go to last post
  27. Rebuilt engine wont start

    Started by mhf2467, 07-07-2019 06:48 AM
    • Replies: 3
    • Views: 3,096
    07-07-2019, 10:29 AM Go to last post
  28. Cap

    Started by bcclew, 06-29-2019 08:38 AM
    • Replies: 2
    • Views: 3,102
    07-01-2019, 09:51 AM Go to last post
    • Replies: 11
    • Views: 3,657
    06-26-2019, 09:31 AM Go to last post
  29. Fuel Regulator Questions

    Started by tparsons56, 06-12-2019 04:30 PM
    • Replies: 4
    • Views: 3,443
    06-13-2019, 02:11 PM Go to last post
  30. Question 2002 5.0 MPI Fuel Problem.

    Started by Detex1, 06-09-2019 10:38 AM
    • Replies: 1
    • Views: 3,021
    06-10-2019, 04:02 PM Go to last post
  31. Greg Huffman

    Started by ghuffer49, 05-28-2019 02:56 PM
    • Replies: 1
    • Views: 3,161
    05-28-2019, 09:03 PM Go to last post
  32. Question Busted engine block

    Started by Brians Bryant, 05-15-2019 08:50 PM
    • Replies: 5
    • Views: 3,161
    05-17-2019, 06:52 AM Go to last post
  33. Marine Power 8.1L Surging Issue? - Video

    Started by jetboating, 05-07-2019 05:00 PM
    • Replies: 8
    • Views: 3,612
    05-09-2019, 09:09 AM Go to last post
  34. Post Mercruiser, 383 Mag Stroker Inboard

    Started by Mercury Mag Stroker, 05-01-2019 10:05 AM
    • Replies: 10
    • Views: 3,644
    05-02-2019, 01:11 PM Go to last post
  35. Twin engine firing LH or RH

    Started by BELGA, 04-26-2019 08:16 PM
    • Replies: 9
    • Views: 3,542
    04-29-2019, 06:05 PM Go to last post
  36. 2007 496 Ho mag coolant Tank keeps overflowing

    Started by luis varela, 02-11-2019 11:54 PM
    • Replies: 5
    • Views: 4,612
    02-13-2019, 09:05 AM Go to last post
  37. 5.7 mercruiser ski intermittent spark issue

    Started by Julz, 08-17-2018 12:19 PM
    • Replies: 2
    • Views: 5,014
    11-01-2018, 10:23 PM Go to last post
  38. Murcury 2 stroke 9.9 hp runs a little rough

    Started by Ahlstrol, 10-06-2018 06:59 PM
    • Replies: 1
    • Views: 4,097
    10-06-2018, 07:11 PM Go to last post
  39. Fuel pressure issue

    Started by Fastech, 10-01-2018 09:25 PM
    • Replies: 1
    • Views: 3,769
    10-02-2018, 07:31 PM Go to last post
  40. Mercruiser 5.7 dies at low rpms

    Started by Justinplumber, 08-19-2018 03:05 AM
    • Replies: 2
    • Views: 4,149
    09-10-2018, 11:09 AM Go to last post
  41. 1991 Mercruiser 4.3 Litre

    Started by SaskGuy, 08-13-2018 03:27 PM
    • Replies: 2
    • Views: 4,299
    08-13-2018, 09:47 PM Go to last post
    • Replies: 3
    • Views: 4,399
    08-07-2018, 08:40 AM Go to last post

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