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  1. J

    Mercruiser 5.0 MPI Fuel Pressure

    Hi QBhoy, I can't be sure if the temp sensor is working correctly - the temp gauge at the dash is not currently working. Could be gauge or sensor (sending unit?). Should I test/replace the sensor to be safe? The engine has been cold when testing the fuel pressure. Thanks!
  2. J

    Mercruiser 5.0 MPI Fuel Pressure

    Hi alldodge, I don't see a boost pump above the water separating fuel filter. As I was retesting the fuel pressure today, I noticed a 'choppy' sound from the fuel pump as it primed when the key was turned to 'on'. The choppy sound also correlated with pressure fluctuations of a few psi below...
  3. J

    Mercruiser 5.0 MPI Fuel Pressure

    2004 Mercruiser 5.0 MPI (serial number 0W029452) has had an intermittent staring issue the last year or two. It has never failed to start and runs well after starting. Another intermittent issue is stalling when coming of plane and shifting into neutral. Replaced fuel filter, distributor and...
  4. J

    2004 Mercruiser 5.0 MPI Starting/Stalling Issues

    Thanks for the help and suggestions here. I cleaned the IAC muffler and replaced the rotor and distributor cap. The old cap was quite corroded. My starting issue is now fixed! It started on the first crank all weekend. I'm still fighting an occasional stalling issue when I come off plane...
  5. J

    2004 Mercruiser 5.0 MPI Starting/Stalling Issues

    I'll check on the muffler condition and the TPS voltage....thanks
  6. J

    2004 Mercruiser 5.0 MPI Starting/Stalling Issues

    Thanks for the spec on fuel pressure. I'll check when I have a chance. The neutral idle does tend to be a bit flaky. Sometimes idles in normal range at 600rpm or so. Other times it wants to idle at 800-1200rpm. Does that point toward any potential issue?
  7. J

    2004 Mercruiser 5.0 MPI Starting/Stalling Issues

    Thanks for the suggestion. I ordered a new OEM cap and rotor and will put it on this weekend. Unfortunately I dumped the contents of the fuel filter before I thought of examining it in a bottle for water content.
  8. J

    2004 Mercruiser 5.0 MPI Starting/Stalling Issues

    Need some help troubleshooting my 2004 Chaparral Mercruiser 5.0MPI with Alpha 1 drive. The engine serial number is 0W029452. The engine has had intermittent starting and stalling issues for several seasons, but the problems have recently become significantly worse. The starting issue tends to be...
  9. J

    Gear Lube in Bilge after first run of season

    Greetings all and thanks in advance for any advice you can provide for my problem. Here's the basics with further detail and questions below: 2004 Chaparral 220ssi Merc 5.0 Alpha I No History of gear lube leaks Recent Impeller replacement and bellows reattachment at shop Refill of lube monitor...
  10. J

    Winching boat onto bunkered trailer

    When I had my 18' Sea Ray out this week I noticed what appears to be a hairline crack about 12" long in the fiberglass hull near the hook eye in the bow. The only possible cause I can imagine would be from winching the boat onto the trailer. When trailering the boat I normally winch (by hand...
  11. J

    Reverse/Neutral Outboard Problems on Mercury 125

    I have a '97 Mercury 125 on my boat. I was cruising about 25mph yesterday and unexpectedly came up on some VERY shallow water. I immediately (and stupidly) threw the remote in reverse to slow the boat, and the motor made an awful grinding noise for several seconds before I put it back in...
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