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  1. K

    '89 OMC Cobra 5.7L Timing

    Can anybody share as to what timing advance their cobras set up at? Does 8 DEG BTDC sound right? It's a GM V8 block Just want to make sure I am up to date on this. Thanks
  2. K

    '89 5.7 OMC Cobra timing

    Gentlemen, Just making sure I did it tight, the book calls for 3 deg. BTDC for 86-88 octane gas. Now that gas is 10% ethanol and how knows what else has changed there since that manual came out, I am wondering if 3 deg BTDC is still a right value? Thanks.
  3. K

    OMC Cobra 5.7L backfires through the carb

    Last fall my 89 Cobra started backfiring through the carb at about 3200 rpms. Also it started vibrating at about the 3000 rpms. Is this ignition related or more of the fuel delivery/carb issue? Thanks in advance guys.
  4. K

    OMC Cobra U-Joint bellows

    Just before I was gonna hook the trailer with the boat to a truck to back it up into the water, noticed a slit in the U-joint bellows. Thanks god it happened before my boat saw the water. No water in the bellows (checked when took the drive off last fall), but obviously have to change the...
  5. K

    Plaining vs. displacement

    Ok guys, I know it's a silly question, but would I save any gas at all if on a rather long trip (approx 25 miles) I would go in a displacement mode (1500-2000 rpm) rather then plaining (at 3600 rpm)? My motor is 5.7 OMC Cobra. Thanks.
  6. K

    OMC Cobra - water in fuel

    Ok, I see a lot of posts like mine here, but I have a very specific question however:<br /><br />I have a 1989 OMC Cobra 5.7 V8. I suspect I've got water in the fuel tank (will confirm that tomorrow). Let's say I do have water, there are a few gas additives out there that dissipate the water...
  7. K

    OMC Cobra gimbal bearing

    Hello everyone. I am new to boats and this season I have to change the gimbal bearing on by 5.7 OMC Cobra.<br /><br />I did buy a gimbal bearing, the one that can swivel out of the outer race along with the grease seal that came with the package.<br /><br />I have the following questions...
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