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  1. K

    I think I may have found out why my 5.0 EFI won't rev past 3,000RPM?

    Hopefully some of you remember me. I have a Regal 1999 with the 5.0 Mercruiser EFI (TBI). I have done so many things to the boat in pursuit of fixing the lack of WOT and power. Such as... Batteries MAP Sensor Distributor Cap and Rotor Fuel Pump Oil Pressure Sensor Heat Sensor Oil Change Spark...
  2. K

    Ignition Timing on Mercruiser 5.0 EFI (TBI) 1999?

    Hey guys, I'm going to see if my ignition timing needs set as a means to cure my poor engine performance at the moment. I know that it needs to be set at 8-BTDC. Does this engine have clear timing marks? (I ask because my boat is quite a while away from where I live so like to make sure I know...
  3. K

    MCM 5.0 EFI possible fuel issue?

    Hello. I have a Regal Cruiser with the MCM 5.0 EFI V8 Engine. There appears to be a fuel issue and I would like your thoughts and opinions. Main symptoms: Boat accelerates to 30mph, then 25, then 20 until eventually it won't go over 10mph. The work done on the engine so far is: service...
  4. K

    5.0 Mercruiser loses power gradually?

    Hello. I have a 1999 Regal Commodore 242 fitted with a Mercruiser 5.0 EFI. The issue is when first setting off, I can get the boat to around 30mph. Then as time goes by, say 10 minutes, it'll top out at 25mph. Skip forward another 10 minutes it'll top out at 20mph and so on. It will get it a...
  5. K

    Bought a boat, now it's broke!

    Where can I find this high pressure fuel pump on the engine? Would these pumps suffice? http://www.ebay.co.uk/itm/High-Press...8AAOSw~OdVbKRj or http://www.ebay.co.uk/itm/Quicksilve...oAAOSw~oFXM1FG based on this image. I would simply change the fuel pumped located on number 29 above...
  6. K

    Bought a boat, now it's broke!

    Hello there, Please excuse my ignorance, I am new to boats and so still trying to remember my starboard to my port. I have just bought a 1999 Regal Commodore 242 fitted with a Mercruiser 5.0 EFI. (340 hours) When the boat was launched and I had to move the boat to my space on the moorings, I...
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