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Type: Posts; User: Dieter

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  1. Re: Inboard '95 Mercruiser GM 350 EFI Magnum Skier limited top speed

    If you're concerned about the return line coming back in at the fuel filter, temporarily take it off the fuel filter and return to an empty 5 gallon can and take the boat out. If this cures the surge...
  2. Re: Inboard '95 Mercruiser GM 350 EFI Magnum Skier limited top speed

    Apologies may have given you bad info on the tach wire color, on the EFI coil i believe it may be a white wire in the efi harness. Long story short the easiest way to take the tach out of the...
  3. Re: Inboard '95 Mercruiser GM 350 EFI Magnum Skier limited top speed

    Given the tach is wonky I would recommend disconnecting it at the negative post on the coil (grey wire) and take a trial run. I understand you've been focusing on fuel, which makes sense, but a bad...
  4. Re: Inboard '95 Mercruiser GM 350 EFI Magnum Skier limited top speed

    Glad to hear it was something simple. On top speed yes would verify the tach but also what prop pitch is on it? Most ski boats are set up for low end pull vs top speed.
  5. Re: Inboard '95 Mercruiser GM 350 EFI Magnum Skier limited top speed

    Looks to me that the low pressure pump is inadequate, would expect a constant output pressure. This maybe a result of the fact this pump is discharging directly into the suction of the high pressure...
  6. Re: Inboard '95 Mercruiser GM 350 EFI Magnum Skier limited top speed

    A vacuum leak you can hook a vacuum gauge up to a port on the intake manifold or at base of throttle body - I think above 15 in hg and steady at idle is good, will drop as the throttle is open . The...
  7. Re: Inboard '95 Mercruiser GM 350 EFI Magnum Skier limited top speed

    Looks like the pump in the vapor separator must have died, and they didn't like $1700 either. Verify the fuel pressure is ok, if it is your problem could be elsewhere. Was there any crud in the fuel...
  8. Re: Inboard '95 Mercruiser GM 350 EFI Magnum Skier limited top speed

    You can put your engine serial number in the engine parts section of this website will give you a complete breakdown of parts. To me it looks like a fuel pump, but regardless with hose clamp used on...
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