Search results

  1. F

    1997 5.7L thunderbolt ignition. Slow crank

    Here are a couple pictures from inside of my spark plug hole.. is that yellow stuff rust? I did spray WD-40 in all of the spark plug holes. And should those be in that position?
  2. F

    1997 5.7L thunderbolt ignition. Slow crank

    Oh and if I am able to do this, can change into one that's fuel injected? Or will that give me a bunch of incompatible headaches?
  3. F

    1997 5.7L thunderbolt ignition. Slow crank

    It is a 1997, 5.7L V8 , 2bbl, 350 , 260hp. I think that's a small block? What exactly would I need to know from the donor engine if it will work? I know I can get the failed engine out and bolt on All of the mercruiser parts necessary to the donor engine, except for I'm reading it would...
  4. F

    1997 5.7L thunderbolt ignition. Slow crank

    Okay I really appreciate you guys helping me diagnose this, I was completely stumped, and since I don't know much about the guts of an engine I figured something was going on beyond my ability. I'm coming to terms that I likely need to replace the motor.. It's lasted me for 15 years and...
  5. F

    1997 5.7L thunderbolt ignition. Slow crank

    Nope it doesn't.
  6. F

    1997 5.7L thunderbolt ignition. Slow crank

    Yes i haven't. I googled how to do that, I see ppl removing the short bolts, and then putting long bolts in the harmonic balancer, to wedge a pry bar in between and crank it? If so , how do I know what bolt to put in there, take one of them out and take it to to a hardware store?
  7. F

    1997 5.7L thunderbolt ignition. Slow crank

    Yes I've already pulled the drive. The only thing I see that is concerning, is one of the two black o-rings is missing on the drive shaft is missing , and the orange one at the that goes into the engine coupler looks like it was stretched and maybe twisted, I don't know if that's just from...
  8. F

    1997 5.7L thunderbolt ignition. Slow crank

    Ok. So the boat is not worth a 10k+ motor replacement, I'm reading a 350 "yard block" and switching all my Marine parts onto it would work. I can pull the motor and put it back in, but how do I know exactly what to get? Like how do I know the motor mounts would be in the same place for...
  9. F

    1997 5.7L thunderbolt ignition. Slow crank

    But if it's turning with the starter, ( although slowly) I would imagine I should be able to turn it by hand to some degree. Just don't really know what to be looking for or what to do if it's turning by hand, but kind of hard. It's obviously not completely seized up, It cranks at a steady...
  10. F

    1997 5.7L thunderbolt ignition. Slow crank

    Oh ok. Yeah the only thing I haven't done diagnostic wise, is turn it by hand, I don't really understand how to do it. I did try to turn the flywheel with a flat blade screwdriver when I had the starter off. It didn't seem like it wanted to budge , And I didn't know if it was supposed to be...
  11. F

    1997 5.7L thunderbolt ignition. Slow crank

    So toast?
  12. F

    1997 5.7L thunderbolt ignition. Slow crank

    Nothing else I can try to be sure? Just don't see how it would randomly happen. And if it was toast wouldn't it be completely seized? I just want to be sure before I give up
  13. F

    1997 5.7L thunderbolt ignition. Slow crank

    I put another new starter on today, and replace the slave solenoid today, took off the drive belt, plugs are still out, removed the outdrive still slow crank. The only thing out of place on the outdrive I noticed is one of the two black o-rings is missing, and the orange one seemed a little...
  14. F

    1997 5.7L thunderbolt ignition. Slow crank

    Ok update. I put another starter on, so this is the third starter, The original one I had replaced 7 years ago, the new one I just bought last week, and I sent back and just got another new one, today I replaced that starter and I replaced the slave solenoid , change the battery cables, Used...
  15. F

    1997 5.7L thunderbolt ignition. Slow crank

    Hehe. I did that, and the starter I took off looked totally fine, I cleaned it up real good with brake cleaner and reassembled it. Works fine on the bench. But either way I have another one coming just to be safe And I sent the other new one I bought back.
  16. F

    1997 5.7L thunderbolt ignition. Slow crank

    Thanks for detailed response 1. Yeah I was just letting you know I pulled the plugs just to eliminate hydrolock 2. I can pull the starter and reinstall the starter in 20 minutes . it takes me about 5 hours to do the outdrive and most of the time I feel like I'm not going to get it back on But...
  17. F

    1997 5.7L thunderbolt ignition. Slow crank

    Could it have anything to do with the slave solenoid by the breaker? This is just so hard to diagnose bc it happened out of nowhere, not coinciding with any particular incident. Ran fine all day and the next day, and then ran fine when I started it in the driveway got it to temperature, and...
  18. F

    1997 5.7L thunderbolt ignition. Slow crank

    Yes, I have had the plugs out, when it still cranked slow, that's when I turned to the forums. I checked the oil oil looks good. I borrowed a new battery from my neighbor just to be sure it's not my batteries. Fully charged in 1 year old still won't turn. The only thing I haven't done is pull...
  19. F

    1997 5.7L thunderbolt ignition. Slow crank

    Yeah and I know I'm running a little rich because I can't quite get it adjusted properly, but that's kind of what led me to all this. Hard start went hot. So when I got back for my 4th of July trip I started it on the muffs in the driveway and it fired up fine, I ran it to temperature and then...
  20. F

    1997 5.7L thunderbolt ignition. Slow crank

    I have not changed my plugs in a long time but since I have them pulled I figured I would share their condition. Do they look rusted to you? The body on all of them that sits outside of the engine all have rust on them, but it doesn't look like they are rusted that goes into the motor. What do...
Top