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    Double engine failure in ten minutes

    Update Began with starboard engine. 1. Charged battery for 11/2 hours. 2. Removed and dumped fuel from fuel filter. Fuel a little orangey but no sign of water contamination. 3. Jumped FI pump to remove any fuel. 4.checked Injectors with tester. Good. 5. Checked fuel pressure 43psi. 6.Checked...
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    Double engine failure in ten minutes

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    Double engine failure in ten minutes

    Update Many thanks for all your suggestions. I have spent the last couple of days arranging to have the boat towed the eight miles to where it can be hauled out. This was complicated by some bad weather. We finally managed it today in rough weather before the Government Dock closed for the...
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    Double engine failure in ten minutes

    Serial # 1A346598 is Port engine. I don’t have the other number handy but both were identical and purchased at same time. Would a fuel pressure issue cause the ECU to shut down the ignition?
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    Double engine failure in ten minutes

    Problem occurred during a one hour slow cruise @1500-1800rpm. Port engine died and sounded like fuel starvation. Starboard engine got us home and then died at idle. Neither motor would restart. Switch on gives one beep as before. Plugs are dry.
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    Double engine failure in ten minutes

    Thanks for reply. No shared fuel tank separate batteries. The idea was to have some degree of redundancy. Correction,the engines are Mercruiser MPI not EFI. I did check fuel filters. Plenty of fuel at Shrader valve at fuel rail but spark plugs dry.
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    Double engine failure in ten minutes

    After a trouble free summer I had a double engine failure with my Mercruiser 3.0 efi engines. Both have 11:00 hours and are completely independent. They only have the boat in common. Both failures appear to be similar. No spark, fuel pump comes on and turns off as normal but plugs are dry...
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    2011 New 3.0 MFI with no spark mystery

    Progress! Mystery solved I think While we were swapping the distributors we noticed that the module in the Starboard engine was not grounding with the block. We made a supplementary ground and presto everything worked, tach, FI (fuel injectors), ignition spark. We have now to hook up a...
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    2011 New 3.0 MFI with no spark mystery

    Many thanks for your replies and suggestions. To answer questions We tested the interrupt switch at the motor. The battery is new and tested. Disconnected the tach with no result. After referring to the workshop manual we can confirm that after switching on the ignition the warning buzzer...
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    2011 New 3.0 MFI with no spark mystery

    Yes 12v at coil. Sorry I did mean MPI (EC) The tach on the starboard engine, the one that has no spark does not register when engine is cranked.
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    2011 New 3.0 MFI with no spark mystery

    I am restoring a 22 ft Grew runabout. The original engines (3.0 Mercruiser 1965) were replaced with new Mercruiser 3.0 mfi units in 2011. These engines were never used as the restoration was ongoing. The port engine started and ran immediately. The starboard engine has resisted all attempts to...
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