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...
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...
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?
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.
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.
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...
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...
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...
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...
