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  1. ryno1234

    One manifold hot (5.0)

    I have a separate post but it's not getting much love likely because it's long and drawn out, so I wanted to do a new post summarized. I have a 1998 5.0 Mercury with a raw water system. I have one manifold / riser running 30+ degrees hotter than the other (~110 degrees at 1,500 RPM vs ~145...
  2. ryno1234

    1999 5.0L MerCruiser Exhaust Manifold Temperature Question

    I realize this was 9 years ago, but do you recall what you found when investigating this?
  3. ryno1234

    One manifold hot (5.0)

    Update to above: I tested the thermostat housing, there is no blockage I pulled both hoses from the thermostat that go to the manifolds and hooked a garden hose up to them. Both hoses flow water through the entire system out the outdrive.... so I don't have any water flow issues from the...
  4. ryno1234

    One manifold hot (5.0)

    Ok - Update: I bought new OEM manifolds, risers, exhaust shutters for both sides and a new thermostat. Installed everything and the boat *runs* good, but... the SAME manifold is still running hot. I held my hand on the port riser and could hold it there indefinitely, I tried to do the same on...
  5. ryno1234

    One manifold hot (5.0)

    Thank you so much for your help @Lou C. I just went out to the garage to inspect the other riser and it is flaking so bad there is a good 2x2in flake of rust separated. Reminds of phyllo dough, lol.
  6. ryno1234

    One manifold hot (5.0)

    I'm wondering if the previous owner took this in saltwater... My last boat which spent time only in freshwater never looked even close to this bad. It makes me concerned about what the condition of the internals of the engine are. If the headers and risers are this bad... wouldn't the engine...
  7. ryno1234

    One manifold hot (5.0)

    I pulled the manifold / riser. I put a hose up against the water inlet elbow on the manifold and water would only come out of one of the 4 water jackets on the top of the manifold and I obviously felt a ton of back pressure indicating some sort of blockage. I tried removing the inlet elbow so I...
  8. ryno1234

    Bearing grease / water leaked out on rim

    Yes - I would trust Les Schwab. They've been very thorough in the past. Understood - I do almost 100% of all my maintenance, and all major engine repair as well. I'm not afraid of maintenance, but I do not have a place to work on the trailer however. My trailer + boat are 30' long and don't fit...
  9. ryno1234

    Bearing grease / water leaked out on rim

    My local Les Schwab tire center said they can handle repacking the bearings, etc. I looked into this, and I definitely *could* do the job, but I'd be working on a road and likely running back and forth to the autoparts store. $450 for Les Schwab to give me all new bearings on both axles (I...
  10. ryno1234

    Bearing grease / water leaked out on rim

    What would I be looking for and what would need to be replaced if that were the problem?
  11. ryno1234

    One manifold hot (5.0)

    I appreciate the comments. I just purchased new exhaust flappers. I'm not looking forward to this change out - my engine is halfway under the back deck of the boat... I have to remove a ton of stuff just to even get to the headers. I'm hoping it's possible without removing the engine, but...
  12. ryno1234

    One manifold hot (5.0)

    If I run the boat without fixing this a time or two more, am I risking any significant damage? My understanding is that it can affect the water shutters but I've apparently already lost one.
  13. ryno1234

    One manifold hot (5.0)

    Here is a diagram of my system. There doesn't seem to be much between the "T" on the top of the engine and the left (from this perspective) manifold / riser. Given this, it seems likely that there is a blockage in this left side tubing or manifold / riser and hopefully that should be easy to...
  14. ryno1234

    Bearing grease / water leaked out on rim

    I took the boat out to the lake over the weekend. After our outing, I parked the trailer and boat at the house overnight and the following morning I see that one of the bearings has the cover off of it and it has dripped a somewhat thing water / grease mix on rim and tire. It seemed much thinner...
  15. ryno1234

    One manifold hot (5.0)

    I updated my question to provide these details
  16. ryno1234

    One manifold hot (5.0)

    Just one of my manifolds becomes very hot to the touch. You'll definitely burn yourself if you left your hand there for 1-2 seconds. The other manifold is very warm to the touch, but it doesn't seem like it would burn you. The engine is NOT overheating. I did find what I believe was an exhaust...
  17. ryno1234

    Ability to use amenities with inverter

    My new-to-me boat has 3 batteries and a 1,100 watt inverter. The boat comes with a microwave, fridge, stove and outlets around the boat. I'm trying to figure out what is reasonable to use while not hooked up to shore power. I can imagine that the microwave and the stove are a no-go if you're...
  18. ryno1234

    Smell from head / cabin area

    This is a great suggestion. I do see coloration in the vent hose. They may be permeated. I'll check that next! Thank you.
  19. ryno1234

    Windlass struggling to pull rope

    I just looked this up, I have a Simpson Lawrence Sprint 400. It calls for 1/2" Medium Lay (whatever that is) 3 strand nylon rope spliced into some chain (again, the chain works great). I haven't checked my rope because the boat is still in storage, but I'll check it out next time. I also...
  20. ryno1234

    Windlass struggling to pull rope

    I'll have to check on the line size - the boat is in storage at the moment. The boat is 24'
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