Ramblin' Guy
Active Member
- Nov 8, 2021
- 156
- Boat Info
- 1997 370 Sundancer
- Engines
- 370 hp 7.4 MPI Horizon w/V drives
Hoping that someone on here with a 7.4L Horizon MPI has some experience with this. I bought a new-to-me 1997 Sea Ray 370 DA this fall and took delivery on Halloween. On my way across Lake Michigan, the starboard engine would struggle to make it to 3300 RPM before dropping to <2000 and stumbling/stalling before regaining power and trying to surge back up to set point. Occasional backfires were also noted. I have a video that encapsulates pretty much how the whole trip went, but it's too large to upload. I can send it via e-mail or PM if you're willing (or maybe someone can tell me how to make it smaller to post!). I thought that maybe there was a clogged fuel filter, so I did the oil change/filter change when I arrived at my destination, but the problem is still occurring.
My current thoughts are that it's the fuel pump, but I'd like to defer to those with more engine experience than I have. The engine computer is indicating an ELECTRONIC TIMING SPARK MALFUNCTION, but I'm guessing that could be a million things.
I figured out how to share it! Here's the link
Any advice is much appreciated!
Thanks,
Jim
My current thoughts are that it's the fuel pump, but I'd like to defer to those with more engine experience than I have. The engine computer is indicating an ELECTRONIC TIMING SPARK MALFUNCTION, but I'm guessing that could be a million things.
I figured out how to share it! Here's the link
Any advice is much appreciated!
Thanks,
Jim
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