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  1. R

    OMC COBRA 5.8 EFI and ESA

    Yes i will look into drag. I have the drive off and hung in garage to drain. So while hanging I worked the shift rod and it moves well. Slightly firmer going down then up -- not sure if that is Fw or Rev. I will fill fluid and post the drag results. Remember it did shift okay when i shifted...
  2. R

    OMC COBRA 5.8 EFI and ESA

    So I will do some more investigation but weather is turning bad so I’ll be limited. I will measure the PULL and see how that works out. I have the drive off so I’ll do a test with it free standing. I know I failed to have a person always standing at the back spinning the prop when I’m doing the...
  3. R

    OMC COBRA 5.8 EFI and ESA

    I did use Jig tools at engine red transom cable and at the drive dog leg assembly.
  4. R

    OMC COBRA 5.8 EFI and ESA

    I mounted shifter in vice and works OK but not without some effort. I remove the larger of the two springs on the detent positioning ball. Even still it takes some pushing to get over the ball. More important when it is in the boat, and I disconnect the throttle and the shift cable at the engine...
  5. R

    OMC COBRA 5.8 EFI and ESA

    Thanks again. So -- in addition to your past suggestion -- to investigate shifter operation, I looked at the SeaStar Osprey CH1752P you provided in a link. At this time it is not available. It costs about $500 CAD. Do you have any other shifter suggestions. Thanks for all your input.
  6. R

    OMC COBRA 5.8 EFI and ESA

    Yes the top access plate was leaking for the first time in 25years. Also important to know I filled to overflow and did not syphon out the excess. Lazy man day and in a hurry. I can believe the hydraulic pressure would have been elevated and perhaps since there is NO relief, that I, am aware...
  7. R

    OMC COBRA 5.8 EFI and ESA

    The rebuild was for the lower part only. They found little problems. Changed clutch dog plus small machining of both gears at point of contact with the clutch dog. He also changed the rubber sleeve between Lower an upper section. I’ll see if he will check seals?
  8. R

    OMC COBRA 5.8 EFI and ESA

    I am hoping you can review the following exchange with AI. Do you think the information is correct. I certainly see foam in the oil I removed and the pressure when I opened it up was high enough to “spew” out. Remember this drive was just rebuilt at TC Marine. It seems to make sense to me...
  9. R

    OMC COBRA 5.8 EFI and ESA

    Thanks for your input as always. I’ll keep you posted on any additional findings.
  10. R

    OMC COBRA 5.8 EFI and ESA

  11. R

    OMC COBRA 5.8 EFI and ESA

    To clarify -- When I removed the drive oil fill cap, there was pressure which spewed oil over the top. I had noticed an oil leak when on hose muffs but could not see where it came from? I remembered overfilling in error but forgot to syphon out excess. As indicated in past threads I did...
  12. R

    OMC COBRA 5.8 EFI and ESA

    Will overfilling drive oil cause shifting problems?
  13. R

    1993 OMC 5.8 EFI and drive system conversion to Volvo Penta

    Thanks for your input. Could you tell me if you have the manual for my model #58FAPRJVN. ( 1993 OMC COBRA 5.8 EFI AND ESA features) . If so could you provide a picture of the written operation of the so called EDS (neutral drive switch) and SAS (shift assist solenoid). Previous to 1993 these...
  14. R

    OMC REMOTE SHIFTER #175496 30 JR — FIX OR REPLACE.

  15. R

    OMC REMOTE SHIFTER #175496 30 JR — FIX OR REPLACE.

    I have a 1993 OMC cobra EFI and ESA model 58 FAPRJVN and I’ve had it since new. The remote control, concealed side mount with trim switch is model number as give above. I was considering replacing it, but found that you can possibly buy many of the sub component I thought a good cleaning and...
  16. R

    1993 OMC 5.8 EFI and drive system conversion to Volvo Penta

    A lot of the EFI information is available in a manual I have. It is SELOC — OMC Stern drives 1986–98. I also have OMC COBRA manual for models MED & MEF. Earlier versions of my engine. That is where I found new names NDS & SAS - I sent you pic of engine earlier. Cheers more to follow.
  17. R

    1993 OMC 5.8 EFI and drive system conversion to Volvo Penta

    Yah so I will ask OMC dealer to see his manual!! I will do pics for us all
  18. R

    1993 OMC 5.8 EFI and drive system conversion to Volvo Penta

    Here is a more detailed version of change per AI. We still would benefit with schematic drawing. Sent by Copilot: Certainly! Here’s a comparison of the shifting methods before and after the changes OMC made in 1993: Shifting Method Prior to 1993: Forward or Reverse Gear Engaged: The engine...
  19. R

    1993 OMC 5.8 EFI and drive system conversion to Volvo Penta

    I found this info using AI to review OMC documents. Here’s a breakdown of the differences between the two switching systems used in the OMC Cobra drive: 1. Neutral Switch and Overstroke Switch (Pre-1993) Neutral Switch: This switch ensures that the engine can only be started when the drive is...
  20. R

    1993 OMC 5.8 EFI and drive system conversion to Volvo Penta

    Thanks so much again. I have Selco book which is where I found the photo top view of the motor and micro switches will different names. There is a whole lot of information on EFI and fuel systems. I’ll do some reading on this over the weekend and perhaps maybe enough there to help. Cheers Bob
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