Originally Posted by MarkM
Thanks you all for your thoughts.
Ball is in the right direction.
I did take off the fuel filling cap on our way.
I took out all the piping and checked.
I did check the waterseperator.
The flow meter is working.
1. Primer bulbs can fail, even new ones = we find it necessary to check every one before fitting and also replace them at least every 2 years.
2. If the DI is showing a code 57 fuel fault and the bulb is going flat then it is probably on the delivery side and not the engine (incl the diaphram) unless you are pulling a high volume of fuel.
3. You need to check where the fuel flow transducer is fitted - it must be fitted after the delphi filter . I would not use this transducer as it can cause a restriction and if fitted before the filter is very prone to blockage.
4. have a close look at the Delphi filter. Most fitted to a standard Cav are rated at 90 litres and from memory the 250 DI as a single may require about 130 litre flow rate.
5. Be warned that running with starvation/restriction can cause significant powerhead damage.
I would be putting bet on filter/flow tranducer area. From that delivery hoses from tank to engine - they may look fine on the outside but check that the inner and outer walls have not parted. From there an itinerant bit of crap in the tank that works its way to the pickups every so often. You could fit a vacum gauge inline and check with the evinrude serice manual that it is within tolerance.