Recent content by OnagaCat

  1. O

    MercMonitor Questions

    I just installed the base MercMonitor P/N 79-8M0062377 for my 2003 350 Mag MPI Alpha One Gen II and it works great except for: 1. I am getting an alarm for the pitot. I see no settings for that nor is there anything in the manual about it. My analog speedo works fine using the factory pitot...
  2. O

    Need O rings for shift shaft bushing

    '03 Alpha One Gen II. I ordered a replacement lower shift shaft bushing assembly and the one I got is the correct one but the two O rings that go with it are not there. I ordered what I thought was the Merc 23-815921A20 and got an aftermarket GLM 21017. What is a good, fast source for the two...
  3. O

    Alpha One Gen II shift bushing assembly replacement

    The service manual says to take the two screws off and lift the assembly and shift rod out. Sounds very simple but do I have to be careful when I do so? What do I need to do to make sure I get the shift rod back in properly when I re-install the new assembly and shift rod? I have heard horror...
  4. O

    Alpha 1 Gen 2 lower shift bushing question

    I'm pretty sure the fluid leak my '03 Alpha 1 Gen 2 drive developed this season is caused by a leaking lower shift bushing. I see there are two different bushing kits available. One has just the bushing itself and the other one has the bushing plus a couple of o-rings, a zip tie and what looks...
  5. O

    Spark plug torque spec

    '03 350 mag MPI - I need the torque spec for the plugs. I've searched everywhere including this forum and haven't found anything definitive! Thanks!
  6. O

    350 Mag MPI plug gap?

    '03 350 mag MPI SN 0M354722. Bought new plugs but the manual and boat at the lake and I want to gap them here at home. Looked all over the 'net but can't find the gap - anyone know? I think it's .045 but not sure.
  7. O

    Ignition type?

    I have an '03 350 Mag MPI serial 0M354722 that has the PCM 555 module. Does this have Thunderbolt V ignition? Thanks to all!!
  8. O

    Alternate wiring for shift interrupt

    I have an '03 350 Mag MPI that had a defective ECU now replaced with an ECU without the shift interrupt codes. Is there a way to wire the shift interrupt switch bypassing the ECU? IIRC the shift interrupt switch is on and off when engaged so would it be as simple as woring into the ignition or...
  9. O

    Where does the 350 Mag MPI wiring harness plug in?

    I have an '03 350 Mag MPI Merc with Alpha 1. I am trying to diagnose an intermittent "beep/stumble" condition. I tried to follow the wiring harness to the cannon plug on the engine yesterday to try wiggling it but the harness goes behind the engine and since the boat has captains call the...
See more
Top