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  1. Lou C

    Broken Spark plug

    Well, marine plugs don't really wear out, you don't put enough hrs on the engine to do that, but I would say removing them and checking for water in a cyl each season (at the end of the season) makes sense and can prevent winding up with a seized engine come spring. Also if you fog your cyls...
  2. Lou C

    What oil should I use?

    One of the highest in zinc oils is Valvoline 20/50. 1400 ppm.
  3. Lou C

    What oil should I use?

    I switched from Dino oil to syn blend, no leaks before and no leaks after…this is on my 1988 4.3, the short block is original…
  4. Lou C

    New purchase SX-M

    Nice vid, that takes some nerve to do but I think it is a case of just enough force in just the right place. Reminds me of the time I had to split my Cobra drive, that thing was not coming apart no matter what (to clean barnacles out of the water intake area). I wound up doing something similar...
  5. Lou C

    The End

    Great pic!
  6. Lou C

    2002 5,7 Mercruiser exhaust manifold keeps cracking - 5 times this summer

    Well if you're on the seventh beer you're working on a 12 pack eh, I rate jobs by how many beers are required to prevent tools from being thrown, bad language used, in fact I had to switch to cussing in my mother's tongue (Italian) so the neighbors don't understand what I'm saying lol. Getting...
  7. Lou C

    1987 3.0L water in oil

    maybe there.... What did the underside of the cyl head look like in that spot, is the block deck and cyl head flat and level when measured with a straight edge and feeler gauges (less than .003 variation?)
  8. Lou C

    2002 5,7 Mercruiser exhaust manifold keeps cracking - 5 times this summer

    Converting your readings from kPa to psi you have about 14 psi on the starboard engine and 20 on the port engine, not sure if that can cause a problem, did you get a trouble code for low water pressure? I know on my brother's boat he did and it limited the RPM due to the low water flow, he had...
  9. Lou C

    1987 3.0L water in oil

    You def had a blown HG and that could be the source of water in the oil, I also see evidence of water leaking to the bottom of the exhaust passage in the exhaust manifold. If you have a good auto machine shop that will do a marine engine let them magnaflux the block & cyl head. Then they can...
  10. Lou C

    I have a leak.

    Those inspection cameras with the movable snake cameras are a great tool for anyone who owns an I/O!
  11. Lou C

    2002 5,7 Mercruiser exhaust manifold keeps cracking - 5 times this summer

    With boats in salt or brackish water it’s common to have to clean out the water intakes if the boat is docked or moored in the water. I had to split the upper & lower gear housings to totally clean out the water intake area on mine. But even though the growth caused warm running (175-185) never...
  12. Lou C

    2002 5,7 Mercruiser exhaust manifold keeps cracking - 5 times this summer

    Given that the water pressure is lower on the starboard side & more bubbles in the feed hose it seems that air is getting sucked in somewhere in the raw water circuit…
  13. Lou C

    Broken Spark plug

    Also it's not a bad idea to remove them once a season, just to make sure they WILL come out, also you can catch other problems like water in a cyl from leaky exhaust.
  14. Lou C

    I have a leak.

    It's not uncommon to have to retighten the band clamps for the elbows after a new installation. When I converted my old OMC 4.3 from the OMC batwing exhaust to the later 2 piece style I spent the extra money for the Volvo OEM 90* exhaust down pipes vs the GLM copies just for that reason, to...
  15. Lou C

    Broken Spark plug

    I have never really had trouble with the plugs seizing but I use AC Delco marine plugs which do not corrode, which I have seen with NGK and Champion, so if you can use the AC plugs, do so. Also if you have any raw water leaks anywhere, fix them promptly! I'm in a salt water region and the boat...
  16. Lou C

    New to Volvo family

    These! https://www.dropbox.com/scl/fi/074ke9bp0zk1ys6xg767h/Cobra-running-on-the-water-hose.MOV?rlkey=mu0s4k98e3zs6rfsyius2hl8u&dl=0 Cobra running on the water hose with those muffs.
  17. Lou C

    Broken Spark plug

    Nice, I might just pick that up, thanks!
  18. Lou C

    New to Volvo family

    Well I don't have a Volvo but here's what I have observed over the years: a lot of those dual inlet rectangular muffs are made out of rubber too stiff to conform to the shape of the lower unit. I had trouble with some of them getting the pump in my Cobra to prime, which is at the end of the...
  19. Lou C

    I have a leak.

    Sorry to hear that! And you've done a great job on this total refit of your family boat! But you'll get it I'm sure. I thought if I ever wind up repowering this boat before I dropped the engine in, I had this crazy idea: with the engine still out, install the outdrive. make covers for the top of...
  20. Lou C

    Broken Spark plug

    Agreed 100% on the thread chaser. Hard to find! I had to go from auto parts store, to auto parts store, to find them. Where I found them was at Paramount Tools in Farmingdale Long Island, in the shadow of Republic Airport, supposedly they actually made machine tools for Grumman Aircraft...
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