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  1. K

    Effect of partial submersion of 5.0 GXI. Effect on Power Steering, Starter, crank sensor.

    2X with SD & AD. If the battery was live however some problems may appear later. I once had a Bayliner brought to me where the rain water went up to the valve covers. The customer first thought that his tires needed air and he towed it to a gas station to air them up where he then saw the...
  2. K

    1969 Glasspar outdrive swap out

    Measure the inside of the lower gimbal ring where the drive rests in the down position and the width of the drive you are going to use. They should be the same. Later model drives had a wider spacing at that point.
  3. K

    Tilt/Trim not working

    It is easier in a work table vise. Just mark the wires and the 2 hoses.
  4. K

    2003 5.0 MPI stubborn overheat issue

    It may be possible that you have a leaking head gasket. The leak can overcome the pressure from the raw water pump.
  5. K

    Tilt/Trim not working

    If replacing solenoids did not fix the problem there is a good chance the brushes in the commutator head are stuck. It is not hard to disassemble the motor to free up them. If the springs are rusted they can be matched up at the local hardware store. Try to post a picture of the tilt motor...
  6. K

    MC-1 Drive Dog failure?

    After losing the 2 blades the open cavity let exhaust blow out around the propeller, the exhaust bubbles ventilated the propeller blade surfaces. Try it again to to see if anything has changed. As AD said you need to perform the shift cable adjustment procedure. There is an excellent procedure...
  7. K

    3L cobra idling too high

    Yes, be sure the choke is fully open when setting the idle against the cam. You may have to readjust the idle with the boat in the water. The back pressure of the water effects the idle.
  8. K

    Harmonic Balancer pulley of Mercruiser 3.0 replacement

    While the pulley and flange from a 2.5 will fit and work it is not the right part. The 2.5 has a very smooth idle compared to the 3.0. The 3.0 has more torsional vibration because of the longer stroke. Make sure that the timing mark on the timing cover is the same as your 2.5 engine.
  9. K

    Mercruiser 350 MAG MPI missing only at 3000 rpms

    Yes NGK
  10. K

    3L cobra idling too high

    Loosen the nut that anchors the cable and rotate the plastic nut threaded on the cable to lower the idle. You will have to also adjust the throttle stop screw to get the idle stabilized. Then retighten the anchor nut.
  11. K

    3L cobra idling too high

    Try to post a picture of the throttle cable where it connects to the carburetor.
  12. K

    2003 5.0 MPI stubborn overheat issue

    If there is a plastic section near the circulation pump on the port side check that there are no pieces in it. I found some in it on the Donzi I had. Most likely you have Bravoitis due to some of the sealing grommets on the incoming water passages The ultimate cure is to put a sea suction...
  13. K

    Mercruiser 350 MAG MPI missing only at 3000 rpms

    Did the new distributor come with a new rotor? From past experience when a rotor heats up they will go to ground at coming on plane and coming off as that is when he most load is on the ignition system. I once had a similar problem with the same engine in my Donzi. I finally cured it with the...
  14. K

    older carburetated mercruiser 5.7 hard start

    The 2 bolts that mount the solenoid could be 3/8” or phillips head or even 5/16”, hopefully not torx. The copper lead at the bottom of the solenoid going into the starter housing is 5/16“ hex. After the bolts and wires are remove rotate the solenoid 90* to remove it. Good luck.
  15. K

    What’s my engine

    460 Ford engine
  16. K

    Engine water flow issue

    It does happen, the guide tube should be longer since it is a blind fit.
  17. K

    Engine water flow issue

    There is an orifice in the thermostat housing that allows water to “by pass” the thermostat that may be clogged up with a rust buildup. If you have access to a blast cabinet that will clean it out otherwise just scrape it out as best you can.
  18. K

    older carburetated mercruiser 5.7 hard start

    When the key is turned and the starter is engaged there is no or very little voltage at the + side of the coil provided from the ignition switch, that is the purpose of the ”by pass” circuit on the starter solenoid to provide voltage at the coil. Just check the coil to make sure there is 12...
  19. K

    older carburetated mercruiser 5.7 hard start

    With a volt meter on the + side of the coil crank the engine over. You should read 11-12 volts. If it is much lower then the “by pass” circuit from the outer connector on the starter solenoid is the problem. To further prove out the problem run a jumper wire directly from the + battery to...
  20. K

    89. Mercruiser engine swap problems

    You forgot to mention which engine you are working on.
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