Search results

  1. 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...
  2. 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...
  3. 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...
  4. 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.
  5. 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...
  6. 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.
  7. 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...
  8. 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..
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. P

    Popped through the intake.

    That's what I am hoping...
  14. P

    Popped through the intake.

    Water separator was immaculate. Let it sit for half an hour and no visible water was present.
  15. P

    Popped through the intake.

    When I check fueling, I cut the threads off to read the base of the porcelain... That's how I was taught. The thin grey band at the base indicates a little lean... Should be about double that thickness. The rust on the plug is only present on #5 and #6... Will be pulling the water separator...
  16. P

    Popped through the intake.

    Got an old glass jar just for that. Will do. I did do a little more detective work and cut open a couple plugs. 5 and 6 were the only ones that looked a little odd. Based on this, I take it back that it isn't a little on the lean side. Also, since it isn't dark out and I can accurately see...
  17. P

    Popped through the intake.

    Fuel was about 12 hours old. separator is due for a change though... I'll pull it too.
  18. P

    Popped through the intake.

    I had double checked timing the other night... per my engine 10 degrees BTDC in base timing. Seemed about there with my dial back so I left it alone. It is a thunder bolt V however. I'm not seeing anything on the plugs that is telling me it's lean but I can be wrong. Stripped, wire run through...
  19. P

    Popped through the intake.

    Problem is different enough that rather than cluttering up my carb thread I figured it best to start a new thread. So what happened: Ran the boat today after rebuilding the carb. Ran for about 2.5 hours with an hour break in the middle. So out on the water for 3.5 hours total. Upon nearing the...
  20. P

    Carburetor question

    So all was good until near the end of my 2 hour run. Started backfiring/popping through the carb. I don't suspect the carb at the moment but I'm going to start digging into it....
Top