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2006 volvo penta 5.7 gxi, was running about 3800 rpms ans…

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2006 volvo penta 5.7...

2006 volvo penta 5.7 gxi, was running about 3800 rpms ans all of a sudden lost power and started backfiring. Got the boat back and started it and now it backfires at an idle

Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so the Marine Mechanic can help you best.

2006 volvo penta 5.7 gxi was running about 3800 RPMs and all the sudden lost power and started backfiring. Got Back to the marina and started it in the morning and now it backfires at an idle

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Don't think so

Submitted: 11 months ago.Category: Boat
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Answered in 1 day by:
8/7/2017
Marine Mechanic: Boat Doc, Boat Enthusiast replied 11 months ago
Boat Doc
Boat Doc, Boat Enthusiast
Category: Boat
Satisfied Customers: 227
Experience: Expert at Just Answer
Verified

Hi, sorry for the delay. First thing is to replace any fuel filters in the system. Backfiring indicates a lean condition so for some reason fuel flow is being restricted. First filters, then if no change, fuel pressure needs to be checked.

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Customer reply replied 11 months ago
Changed fuel filter today no change. Tomorrow i will check fuel pressure
Marine Mechanic: Boat Doc, Boat Enthusiast replied 11 months ago

Let me know and we'll work from there.

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Customer reply replied 11 months ago
Just checked fuel pressure and it at 52, right where it should be, any other ideas?
Marine Mechanic: Boat Doc, Boat Enthusiast replied 11 months ago

D​oes that year have a distributor? Not by my manuals right now.

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Customer reply replied 11 months ago
it does, the flat kind, i also swapped it and rotor yesterday and no change,
Marine Mechanic: Boat Doc, Boat Enthusiast replied 11 months ago

Do you have a timing light?

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Customer reply replied 11 months ago
No i dont
Marine Mechanic: Boat Doc, Boat Enthusiast replied 11 months ago

I'd check the timing next if you can borrow a light, possibly from the auto parts store? I'm afraid it may have jumped time.

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Customer reply replied 11 months ago
Ok ill see what i can do
Marine Mechanic: Boat Doc, Boat Enthusiast replied 11 months ago

You should see it around 10 degrees BTDC at idle and then moving up to around 30 ish as the engine speed is raised.

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Customer reply replied 11 months ago
Still checking on some stuff
Marine Mechanic: Boat Doc, Boat Enthusiast replied 11 months ago

Okay.

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Customer reply replied 11 months ago
Looks like one of my rocker bolts came loose and the Rockers slipped off we'll see what happens when I get back together
Marine Mechanic: Boat Doc, Boat Enthusiast replied 11 months ago

Oh man, hadn't even gotten that far yet, good catch. Hope it didn't do any more damage.

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Customer reply replied 11 months ago
Yeah me too
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