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  1. Lou C

    1988 candia 180 4.3

    If it came with a 15x17 could be an OMC Cobra, that’s what mine came with with the 4.3-4bbl. If your max WOT rpm is low a general check up is in order, for the 4bbl models the rpm spec is 4600-4800.
  2. Lou C

    4.3 l mercruiser one piece exhaust manifold temp senor install

    If you really want to monitor temps just get an IR temp gun to leave on the boat, that’s what I do.
  3. Lou C

    4.3 l mercruiser one piece exhaust manifold temp senor install

    The engine is 24 years old, and those manifolds were only made for 3 years because Mercruiser couldn’t get the wall thickness consistent so there were a lot of failures. When that happens it will let water in the cylinders which can ruin the engine. Merc & Barr both make conversion kits to...
  4. Lou C

    4.3 l mercruiser one piece exhaust manifold temp senor install

    Those are prone to failure due to casting flaws, I’d get rid of them & convert to the 2 piece system before they hydrolock the engine
  5. Lou C

    1998 Volvo/OMC - When shifting to forward, the motor stalls. It runs fine on muffs.

    That would be the cheapest repair of all possible causes!
  6. Lou C

    2016 Mercruiser 6.2L ECT DTS Axius Cooling System Issue

    Isn’t Marelon plastic? Yeah every year I think the same thing last year with the I/O and just keep fixing it! Have thought of a much newer outboard boat but given I’m turning 70 in the fall I don’t know I’d get the use out of it for it to be worth it with our short season….
  7. Lou C

    Flushing Sea Ray 250 Sundancer in salt water... How To, and is it necessary?

    There was a guy on the Jeep boards I frequent who boated in Fla and he added that Volvo neutra salt system and he said it definitely extended the life of this manifolds & elbows.
  8. Lou C

    1998 Volvo/OMC - When shifting to forward, the motor stalls. It runs fine on muffs.

    So shift to fwd stalls but rev ok? Make sure you tell the techs that….
  9. Lou C

    1998 Volvo/OMC - When shifting to forward, the motor stalls. It runs fine on muffs.

    https://www.marineengine.com/parts/omc-parts/omc-boat-parts.php?year=1998&hp=5.7&model=57FCPBYC&manufacturer=OMC+stern+drive&section=Exhaust+%26amp%3B+Cooling part number 42 are the exhaust flappers in the pic below you can see the lower exhaust hose, the flapper is below that at the top of the...
  10. Lou C

    1998 Volvo/OMC - When shifting to forward, the motor stalls. It runs fine on muffs.

    Well it’s not a hard thing to check but it involves loosening the clamps that hold the rubber exhaust hoses to the elbows, 90* down pipes & Y pipe. Then you can remove the in 90* down pipes & see the top of the Y pipe if the flappers are there it will be obvious. If not but you see the rod they...
  11. Lou C

    3.0 exhaust manifold over heats

    https://www.marineengine.com/parts/omc-parts/omc-boat-parts.php?year=1998&hp=3.0&model=302CMBYC&manufacturer=OMC+stern+drive&section=Cooling+%26amp%3B+Oiling OK this is a diagram for a 1998 OMC Cobra 3.0 but keep in mind this is the joint venture period when OMCs and Volvos were basically the...
  12. Lou C

    3.0 exhaust manifold over heats

    And the why and wherefore of "warm" vs "cold" manifolds which I was able to experience directly, while fixing another problem... So for the longest time, I have heard the statement, you must run a 140* stat in salt water or else salt will clog your engine. Not true in my experience but I'll get...
  13. Lou C

    3.0 exhaust manifold over heats

    That would actually "bypass" the elbow and the water goes straight into the exhaust pipe!
  14. Lou C

    1998 Volvo/OMC - When shifting to forward, the motor stalls. It runs fine on muffs.

    Something it putting an extra load on that engine once there’s water in the Y pipe. Water in the cyls can cause misfires and rough running also, perhaps back pressure is too high, did this engine have the flappers that Volvo later said to remove? If these work loose or melt from an overheat...
  15. Lou C

    3.0 exhaust manifold over heats

    On the 3.0 cyl head the center cyls have the exhaust valves right next to each other so if the engine is running hot due to typical overheats, overheated exhaust or detonation it will blow the HG between those center cylinders. Ever check to see what temp the ‘stat opens at? Most Volvos and OMCs...
  16. Lou C

    1998 Volvo/OMC - When shifting to forward, the motor stalls. It runs fine on muffs.

    Pull the spark plugs & see if water comes out the cyls
  17. Lou C

    1998 Volvo/OMC - When shifting to forward, the motor stalls. It runs fine on muffs.

    I'm wondering if you're getting water in the cyls when launching the boat....
  18. Lou C

    Installing Bravo3 Sterndrive

    1) I for sure would be using an outdrive jack to install this heavy drive, and start with the bell housing and the drive at the same exact height, try to get the face of the bellhousing straight up and down 2) do not use grease at all on those driveshaft o rings, only use motor oil, if there is...
  19. Lou C

    1998 Volvo/OMC - When shifting to forward, the motor stalls. It runs fine on muffs.

    Does it stall in reverse as well? Will it shift into gear without stalling when on land running on the water hose? If it's suspected that the outdrive is locking up it could be removed, and water could be fed to the raw water pump to run the engine with the drive removed. A dock line wrapped...
  20. Lou C

    4.3 v6 Timing suggestion

    I have the same engine, I have thought about upgrading to an electronic distributor but was always concerned about what the advance curve for them would be, given the way they were set up by OMC the advance curve was so ultra conservative. Points are OK on marine engines that don't get a lot of...
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