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  1. K

    1997 Mercruiser 5.7 EFI blown head gasket

    I made some progress this evening. I got the exhaust manifolds and the distributor removed. I also verified the valves are opening and closing on the cylinders with no compression (#3 & #5). When I put #3 at top dead center on the compression stroke and applied shop air through the #3 spark...
  2. K

    1997 Mercruiser 5.7 EFI blown head gasket

    I should be able to tell if it is a Vortec or non-Vortec this evening based on the quantity of intake bolts per Bondo's description. At this point, I don't know if it is the headgasket, all I know is I have zero compression on two adjacent cylinders and am assuming it's a headgasket issue.
  3. K

    1997 Mercruiser 5.7 EFI blown head gasket

    The temp. gage never went above 170°. When I had the plugs out, they all looked on the black shade. They weren't grey which would indicate overheating. The prop is the same prop that's been on the boat when I bought it eight years ago and over 1000 hours of use. I need to get it apart and...
  4. K

    1997 Mercruiser 5.7 EFI blown head gasket

    Seven years ago, it got to 190° and the alarm went off so I shut it off to clear the water intake. From that point until a couple of days ago, it's been fine. At this point, the only thing I know is that I have zero compression in cylinders 3 & 5 and I assume it's a headgasket. I definitely...
  5. K

    1997 Mercruiser 5.7 EFI blown head gasket

    Thanks for the information! Hopefully the rain stops so I can start tearing it down tomorrow evening. If it is the pre-vortec, are those heads prone to cracking like the vortec heads are?
  6. K

    1997 Mercruiser 5.7 EFI blown head gasket

    I don't believe the heads on my engine are the Vortec heads - the HP at the prop is 220 and I think the LX version of the 5.7 had 250 HP at the prop. would have the Vortec heads but I won't be sure until I get the heads removed. Those were the two of the available engine choices for '97 that...
  7. K

    1997 Mercruiser 5.7 EFI blown head gasket

    The engine has about 1750 hours on it - not sure what the recommended valve service is but the way shops are booked where I live, I probably wouldn't get the heads back before the end of the boating season. I need to be ready for a trip on July 1st so just changing the head gaskets is going to...
  8. K

    1997 Mercruiser 5.7 EFI blown head gasket

    I'm seeing differences in the OEM head gaskets under the same 27-75611 part nos. One is an all steel gasket, another version is steel rims near the cylinder bores with a graphite type gasket and another version that looks like an automotive gasket. I am wondering what caused the gasket to go...
  9. K

    1997 Mercruiser 5.7 EFI blown head gasket

    That's what I am seeing when looking at photos of the parts. The intake gaskets are also different between the marine and the automotive version - the auto version has one of the ports restricted with a small hole vs. open in the marine application. The only time the engine overheated was...
  10. K

    1997 Mercruiser 5.7 EFI blown head gasket

    On the way in from boating this afternoon, my boat began to lose power and I could tell that it had a bad misfire. After getting it home, I did a compression test and below are the results: 1: 170 psi 2: 165 psi 3: 0 psi 4: 160 psi 5: 0 psi 6: 160 psi 7: 150 psi 8: 145 psi, 150 psi wet after...
  11. K

    Cracked trailer fender

    I agree - if the tires were that bad, it would be obvious but I just don't know what else it would be.
  12. K

    Cracked trailer fender

    Metal fender. Welded to the trailer frame. The only thing I can come up with is the tires are causing vibration since they are not balanced and the vibration is causing the metal to fatigue and crack.
  13. K

    Cracked trailer fender

    The curbside fender on my boat trailer has a stress crack. The only thing I can think would have caused this issue is a tire that is out of balance causing vibration that eventually caused the fender to crack. Typically trailer tires aren't balanced but I think I may have all four trailer...
  14. K

    1958 Evinrude 7-1/2 Fleetwin carburetor overhaul

    I talked to the dealer and he told me to do exactly that - he said to just install the clip and it will be fine so that's what I am going to do. I am hoping to run the motor in the barrel this weekend to test it out.
  15. K

    Fabricating a new transom for a 14 foot Cadillac aluminum boat

    Valid points. Thank you!
  16. K

    Fabricating a new transom for a 14 foot Cadillac aluminum boat

    The inner and outer wood has rotted away. There was a 3/4" piece of plywood on the inside of the aluminum and 1/2" on the outside based on the amount of exposed portion of the bolts. I am going to fab up new transom pieces using exterior grade plywood and I initially thought about coating it...
  17. K

    1958 Evinrude 7-1/2 Fleetwin carburetor overhaul

    I looked into that but it looks like it would interfere with the points when they open up. I am going to call my dealer and see what he has to say about it.
  18. K

    1958 Evinrude 7-1/2 Fleetwin carburetor overhaul

    Part no. 172522 genuine Envinrude/Johnson kit. When I called the dealer for the secondary ignition wire, he asked me if I had the points and I told him I did and he said to bring them in as there has been some issues where some batches of points needed to be modified so they could be adjusted...
  19. K

    1958 Evinrude 7-1/2 Fleetwin carburetor overhaul

    I am talking about the movable portion of the points. I don't want to use the old half of the points because they're pitted. Attached is a picture showing the problem.
  20. K

    1958 Evinrude 7-1/2 Fleetwin carburetor overhaul

    I ran in to a problem - the spring on the movable sectopn of the points is about 1/8" longer than the originals and will interfere with putting the clip on. I'm thinking I need to mark the spring length and trim off the excess or is there something else that should be done? I am able to push...
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