454 mercruiser

  1. Steve Leach

    93 370 sundancer with high hours

    Hey everyone. I am still looking and it’s getting old lol. I am looking at a 93 370 DA with 454 s. This boat is in beautiful shape compared to a lot I looked at and has a survey to prove it. The issue with the boat as there seems to be a issue with everyone I look at is the high engine hours and...
  2. 3

    454 Horizon rpm jumping

    Hi All, Twin ‘98 7.4 454 Horizon Engines looking for some general suggestions on what to check as my port rpms are jumping around a good bit. Not at idle but at running speed up to 400 rpms up and down. Starboard maybe 100 rpm fluctuations. Not sure if injectors are all original or not but...
  3. Mike Siner

    Mercruiser 7.4 454 CI loss of oil pressure

    I just bought a 1992 Sea Ray 350 Express Bridge with twin 454 Mercruisers 7.4L. On the sea trial, both engines ran great with oil pressure in 70 psi range; after I bought the boat, I started it up to take it out, and the port engine low oil pressure alarm went off and the gage showed 5psi. I...
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