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  1. P

    Popped through the intake.

    I have no clue. Freeze plugs were brass, all the gaskets I saw were merc part numbers but I didn't go deeper than that on it. Like I said, bought it used from a mechanic but... they'll say just about anything if it means making a buck and is one of several reasons I work on my own stuff. It came...
  2. P

    Popped through the intake.

    I'm leaving no stone unturned.
  3. P

    Popped through the intake.

    I've started putting feelers out for replacement... you know, now that the initial shock and pain of my own stupidity in purchasing a used "good" engine is over. Regardless my season is on hold or more likely over for the 19... Spent the last 2 days off enjoying some cold snacks at the marina...
  4. P

    Mercruiser 5.7L Engine Hoist Recommendations

    I recently used my cousins boom truck... even as an 1988 the control was plenty fine, it it wasn't like I was replacing same with same so we had to put it in and out several times to check clearance, get everything aligned etc... On the sketchy end, we've used a skid steer... I would not...
  5. P

    Popped through the intake.

    I have no idea. It was a "fresh rebuilt, low hour and ready to go" engine I purchased early may. Obviously, based on the fact I've had all of 5 hours put on the thing, I don't believe that to be entirely correct information. I can say I know of someone who won't be getting my business again...
  6. P

    Popped through the intake.

    Little bit of the cam lobe carnage.
  7. P

    Popped through the intake.

    Alleged fresh rebuild from the guy I bought it from. I had the pan off right before I installed it, from the bottom, everything looked brand new... one of the lobes has pitting... I'm kind of disgusted right now. Oil was clean both times I changed it... Ran maybe 9 hours before yesterdays...
  8. P

    Popped through the intake.

    Well, this isn't pleasant.
  9. P

    Popped through the intake.

    Most of my friends have substantially newer boats with delco EST and MPI or very old stuff with points still. The points coil may work, but from my understanding the thunderbolt coils are a little different. I could ask my friend at the marina, they are gutting some late 80s small block boats, I...
  10. P

    Popped through the intake.

    I've checked out the choke while running... it comes off completely within 30 seconds of starting... 95 degree ambient temps plus 85 degree water temps, doesn't come on very long. I had tried the choke before I rebuilt the carb and all it did was bog it out by going pig rich... black smoke and...
  11. P

    Popped through the intake.

    So I went back out tonight, was able to more or less duplicate the problem. However I wasn't able to get the arcing from wherever tonight... Same symptoms, running maybe 30 minutes, gets a little backfire. I came off the throttle brought it back up to cruise (~3000 rpms) and about 5 minutes...
  12. P

    Popped through the intake.

    I'm hoping to get better eyes on it another night. Take it back out on a night run, duplicate the problem, see if I can find where it is arcing from. The fact I both stopped hearing and seeing it is suspect.
  13. P

    Popped through the intake.

    I did add a little when I replaced the plug wires with the cap last week, but I can repack and check again. The coil had a heavy residual from the old wire I cleaned out. It was such a small mist too that it caught me off guard... I could see if it got hosed down but I'm talking like 2-3 mists...
  14. P

    Popped through the intake.

    OF course I couldn't duplicate on the trailer in the dark... So no go there. I lightly misted down the coil with water from a spray bottle... Caused it to run like sh!t and stall several times. Couldn't see any visible arcing. Monday is another day, got 3 days of work for the time being.
  15. P

    Popped through the intake.

    So basically, it would seem the necessary conditions for this to set are: Engine needs to be hot and ran for a bit, muffs won't do, needs to be in water needs to be at elevated RPMs for prolonged period I am thinking I will start by replacing the intake gaskets... While I don't believe it is...
  16. P

    Popped through the intake.

    Update: Running back to the ramp I took it easy, 2600 rpms, about a minute in I just started completely losing power/rpm. No pop or back fire just felt like someone dumping throttle... I'm at the ramp, let it idle the rest if the way as it seems fine doing that..
  17. P

    Popped through the intake.

    So... I ran up and down the river at a nice 3700 rpms. Boat runs great there, about 31-33 MPH. Everything seemed great... until it didn't. It started missing after about 10 minutes. I dumped the throttle. I can describe only what I hear as basically arcing coming from the distributor/coil area...
  18. P

    Some possible water in my outdrive and the outdrive was making that clacking noise again. Pics and Videos Enclosed.

    One thing I noticed... you have the drive at a different level of trim (further down) when the noise stopped...
  19. P

    Popped through the intake.

    So today, I checked for vacuum leaks, couldn't find anything obvious. New cap and rotor as well as plug wires are in. Rechecked fuel pressure, while running, I am seeing a steady 7 psi with the new separator. I also had to readjust timing by about a degree, so I went through that whole process...
  20. P

    Popped through the intake.

    So before I go and do anything else... This is my intention for today... I plan to double check timing, set it in base mode etc. confirm all that is correct. Then look at the fuel system. We have some pop up storms blowing through today and I'd rather not get caught out on the water in one. I...
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