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  1. M

    Diesel additive

    So, because the boat in my details has petrol engines, I’m not allowed to own or care about other diesel engines ?
  2. M

    Diesel additive

    OP isn’t a “member”, so someone posting a link to “member only” sections is probably less than helpful. All the advertising on my screen doesn’t pay csr enough? They need to gouge for access to the good sections?
  3. M

    Vacuflush... Blocked or Pump Vacuum?

    The duckbills are inside the pump unit.
  4. M

    Diesel additive

    Apparently I don’t have permission to read this...
  5. M

    Vacuflush... Blocked or Pump Vacuum?

    The duckbills are one way valves, that are made of rubber and look a bit like duck bills.... they are what makes the system work - if your system builds and holds vacuum, they are most likely fine. Be very careful using plungers on vacuflush systems as the action of a plunger can invert a...
  6. M

    Better replacement for this coolant into intake manifold line?

    To be honest, it looks just fine. Clean the threads with an old toothbrush, lube the threads and gently put it back together. They probably discontinued the part because they weren’t selling any.
  7. M

    Film behind boat?

    Could be a failing fuel pump/injector causing gross over fueling. Could be a faulty seal on the trim system Could be a faulty seal on the outdrive. Could be a faulty oil cooler or power steering cooler. My money is on fuel pump.
  8. M

    04 300DA aft accessory

    You need the owners manual for your boat - in there is a wiring diagram..... most likely the wire you need will be coming from the aft eim in the engine bay, it won’t be particularly long and most likely just buried in the loom. You’ll need to identify it by colour and wire number (from the...
  9. M

    Royal purple power steering fluid

    Boat of that age, i’d Bet on dexIII auto trans fluid I also agree, if the level is low, something needs fixing
  10. M

    Vacuflush head

    Depends exactly what vaccu-flush unit you have..... In my 2006 300da, the vaccu-flush unit has 4 duckbills that are a larger size (possibly 2 inch?) on the vacuum generator, and 2 duckbills of a smaller size (possibly 1.5 inch) on the macerator/discharge pump. Somewhere on your unit should be...
  11. M

    New batteries...old charger?

    Agm is a construction method. What sets voltage requirements is chemistry. (Not simply “lead acid”, but any other alloyed metals in the lead (antimony and calcium to name 2 common ones), any other additives in the electrolyte) Get the voltages wrong you ecectrolytically remove the water from...
  12. M

    Coolmatic Freezer on 420da does not stay cold on 12v

    I have a portable fridge/freezer that used the bd50 compressor..... on mains power or on 24v, it’s an absolute champion and if you’re not careful it freezes the beer.... OTOH, on 12v it’s a tempremental little beyotch, takes ages to chill down, complains about voltage every time the compressor...
  13. M

    Noflex Digestor for bilge cleaning?

    Ladies and gents, you are likely paying far too much for this stuff.... especially if you are paying 32 bucks for 16 oz... The active ingredient (80% by weight) is “disodium carbonate with hydrogen peroxide compound”..... there is another common chemical name for this - “sodium percarbonate”...
  14. M

    Making water under the engine

    Water heater back there somewhere? Could be leaking, or have a faulty safety valve
  15. M

    Cockpit lights don't go on right away

    Failing EIM? Failing switch panel?
  16. M

    Newbie here, need a little help

    Depends how the boat is wired.... But, generally speaking, wth the battery switch off, nothing will be powered but th battery charger will still be able to charge the battery.
  17. M

    5.0 efi running rich

    Yes, (at least on some versions) the fuel pressure regulator is part of the cool fuel module... On the cool fuel III, there is a known paint flaking/corrosion issue that clogs the screen on the fuel pressure regulator, causing gross over pressure. Should be somewhere about 40 psi ish (don’t...
  18. M

    5.0 efi running rich

    Could also be faulty injectors Or faulty fuel pressure regulator Or (if it has one) faulty o2 sensor
  19. M

    Bravo 3 service estimate

    Looks quite neglected.... See that crack in the bellows.... only a few trim adjustments before that sank the boat - they are an “inspect annually” item for a reason. I’d suggest having a qualified mechanic do a full inspection on the both drives and transom assemblies 49 bucks for “ listen...
  20. M

    Electrical Gremlins

    Could be a power factor issue - especially if the “converter charger” is an old inductive type and is failing. As others have suggested, it could be a battery issue (less likely now you had them checked) - if they were really low, that could make the charger pull excess current... Could also...
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