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  1. Lou C

    Hydrolock, swim platform, riser height and static water line question

    If you look at the pic of the op’s boat in the water, the water line is over the top of the outdrive right under that cap at the very top of the transom mount. Based on this diagram that puts the static water line slightly above the top of the Y pipe. Mine might be like an inch higher and with...
  2. Lou C

    Hydrolock, swim platform, riser height and static water line question

    That would be Volvo’s cost be damned engineering strategy. I bet you could make it work with the right combination of hoses, or rigid fiberglass exhaust tubing. Pull the engine to do this job? How do you say no way in Swedish! Same company that decided you have to replace an entire driveshaft to...
  3. Lou C

    Hydrolock, swim platform, riser height and static water line question

    What you'll need to do is measure how much more hose you need there and get a piece or have a marine supply shop cut you a piece of 3.5" exhaust hose. Might be able to buy one pre made.
  4. Lou C

    Hydrolock, swim platform, riser height and static water line question

    OK and looking at your transom mount, yours does seem to sit about an inch lower in the water than mine, not sure if that's enough to make a difference.... Also, while the static water line measurement is done with boat stationary, keep in mind when you slow down and come off plane, usually the...
  5. Lou C

    Hydrolock, swim platform, riser height and static water line question

    this is always a possibility, in my experience with blown head gaskets, it is more consistent than some of the these reports of water intrusion. With the just high enough elbows, or and added swim platform, the conditions have to be just right for it to happen, so it may happen sometimes and not...
  6. Lou C

    Hydrolock, swim platform, riser height and static water line question

    OK if you look at the idle relief ports under the transom mount, they are pretty small. The exhaust bellows on the other hand is like 3 1/2" in diameter, so the amount of water that could rush in from the bellows is a good deal more.
  7. Lou C

    Volvo Penta 5.7Gi Closed Cooling Question

    agreed use the Volvo OE ones and do check the mating surfaces as described above & use a torque wrench.... next time use Barr Marine...cast in USA and their gaskets are good...
  8. Lou C

    First time pulling a riser with questions about condition w pics

    You can tell you have the half closed cooling system, in raw water cooling no way would it look that clean. If I recall properly on the OMC style stats and housings (which is what Volvo used in this time period) they start to open at the rated temp and should open to 5/32nds minimum approx 20*...
  9. Lou C

    Carb issues

    Only time I had a back fire through the carb was after a bad overheat back in '13, the first start up in '14, warning signs were that, and a bit of sodium (salt water boat) showing up in an oil analysis I did the following year. That was the beginning of the head gaskets starting to leak...
  10. Lou C

    Carb issues

    hard to say really there can be multiple causes for backfires/misfires. Compression test, will find sticky valves other causes: fouled spark plugs plug wires with too much resistance corroded contacts inside distributor cap, cracked cap or rotor carb issues. It's all auto shop 101. BTW the...
  11. Lou C

    4.3MPI surges badly above 2600 rpm

    Sure is. Why I like the simple mechanical pump pre Vortec engines. At most $100 and a half hr of work to install.
  12. Lou C

    Carb issues

    Could be sticking intake valves, it happens and the cause could have been the water intrusion
  13. Lou C

    Hydrolock, swim platform, riser height and static water line question

    I agree I might want to replace those elbows to be on the safe side and that also gives you the opportunity to upgrade to taller ones. Even if you need to do minor fiberglass work to achieve that goal it’s worth it. Keep the mind that water in cyls and hydrolock will destroy and engine sooner...
  14. Lou C

    Hydrolock, swim platform, riser height and static water line question

    If you can post up a pic of the boat in the water specifically the transom so we can see how high up the water is against the transom mount assembly. Here’s mine...the Cobra transom mount & the Volvo SX mount are nearly the same. The cat is fake and keeps birds from using it as a toilet lol!
  15. Lou C

    Omc 4.3? What did i buy?

    eBay, I found a couple of good pre Vortec ones there and the Vortec ones are probably easier to find
  16. Lou C

    Hydrolock, swim platform, riser height and static water line question

    There would be rust stains in the bottom of the exhaust gas passage of the exhaust manifold. Inside the exhaust gas passage there should just be dark grey/blackish deposits, no rust. The other questions are difficult to answer.
  17. Lou C

    First time pulling a riser with questions about condition w pics

    for the flame arrestor I'd use carb cleaner and dry with compressed air. plugs, it depends on if it's a pre vortec or vortec engine. Does the intake manifold have 8 (Vortec) or 12 bolts (pre Vortec) holding it down?
  18. Lou C

    First time pulling a riser with questions about condition w pics

    Might be as simple as a clogged dirty flame arrestor & spark plugs that need to be replaced. See how the exhaust ports on the pic of my engine are a lighter grey?
  19. Lou C

    Hydrolock, swim platform, riser height and static water line question

    Aftermarket. Like what you see on inboard boats with thru the transom exhaust. The OMC/VP exhaust bellows is retained with a clamp on the gimble housing end and a snap ring in the pivot housing end. So to remove it you have to pull the drive get a snap ring pliers and remove that end, then tilt...
  20. Lou C

    Hydrolock, swim platform, riser height and static water line question

    I looked up your engine in the V/P parts diagram on this site and it did not come with flappers. I’d consider removing the exhaust bellows and installing an exhaust flapper on the gimble housing where the exhaust bellows would normally attach. I’d start with that and if it solves the problem...
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