7.4l

  1. GABulldogsNH

    Centa Marine/Mercruiser Damper plate

    mercruiser Centa Marine Damper Plate. Centa Mercury marine cf-ds-22-336 21-00814-00 fits v8 mercruiser engines at damper plate. Lightly used (1 year) fully functional in great shape. 875 brand new, asking 375. Will ship
  2. GABulldogsNH

    v8 bell housing cover

    Mercruiser Bell Housing Cover V8. Used mercruiser (GM) v8 bell housing cover with top or bottom mount starter locations. Like new. $170
  3. bobt2000

    Normal exhaust?

    I just took the Sundancer out for her first run of the year. I bought it late last year and have never had an inboard before. So my question is this....in the picture....both bottom corners...see the exhaust from the side ports?? Is this normal?? Almost nothing at idle. I was running at about...
  4. M

    How Bad Does This Riser / Manifold Look?

    Hello, looking to purchase a 2000 SR 270 Dancer with 7.4L MPI. There are no accurate records of when the last time the risers / manifolds were replaced. The boat is in fresh water and has 397 hours. I noticed some rust on the gasket where the riser and manifold meet. Is there any way to...
  5. A

    MCM 454 to MIE 454 compatibility

    Hi, I have a sea ray sundancer 290 - 1996. Last year my engine, Mercruiser Bravo-II, MCM 454 7.4l gave up and I am now looking at replacing it. I managed to find a Mercruiser MIE 454 Magnum MPI 7.4l (385 hp) that was recently renovated/serviced at a good price. However, as I realized that...
  6. I

    7.4L Mercruiser battery drain - Alternator Loom??? any help gratefully appreciated!

    Hi guys! Hoping you can help diagnose the drain on house battery (0.8A) when everything was switched off. Everything functions normally (which is hot wired to the battery - such as bilge/mercathode etc). I came across a similar thread which suspected the Alternator, so I tested the wire loom...
  7. Tomco

    Why would the ignition timing not be advancing past 16 degrees?

    I'm looking at purchasing a 2001 Sundancer 340 with the 7.4MPI engines. The survey uncovered that the starboard engine was not putting out the same RPM as the port engine - 3900 vs. 4400. The current owner has been diligent (through a certified marine mechanic) but unsuccessful in resolving...
  8. Tomco

    Low compression on one side

    My wife and I are just in the process of buying our first cruiser and have an offer on a 2001 Sundancer 340 with the 7.4MPI MerCruisers. We have had a survey completed with only one finding based on the sea trial - at WOT the starboard engine runs at about 4150 RPM, which is about 250RPM less...
  9. J

    High idling problem 7.4l mpi 2001 sr 270 sd

    Hi there I have a 2001 Sea Ray 270 SD with a 7.4L MPI (L29) engine and MEFI 3 ECM. Problem is: When i start her up(cold) she starts very fine but immediately she goes up to about 1800/1900 RPM. When she reaches running temperature, 160 deg she will then drop to about 1000 RPM and then drop...
  10. S

    7.4L 454 Engine Start-up... Is this Normal?

    I purchased a '96 270 Sundancer a few weeks ago and it has a 7.4L motor in it with low hours (about 300 original hours). I'm curious to hear your feedback on these two questions: (a) What is the "proper" start-up procedure for a big ol' carbureted V8 with electronic ignition? (b) How long...
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