Search results

  1. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Good to know. I bought it in November and have no idea when it was done last. I’m sure I didn’t help it along but it sounds like I was going to need to do it anyway at some point. Thank you very much for your help and I’ll post pictures of the impeller replacement as I go along. Dave
  2. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Yeah, it’s a bravo 3 stern drive and the pump is indeed under the engine. Couldn’t be easy..
  3. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Alrighty…assuming this is the right kit, I’ll let you know how it goes.
  4. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    I’d say 15-20 times for a few mins each.
  5. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Headed to West Marine to make another “donation” now. How long would you guess I have before I need to pull the trigger on the swap? Rough estimate is fine…
  6. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Man, my face is a bit red on this one. I completely misunderstood the point of that circulation system, then. Thank you for the help!
  7. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Should I look to replace the impeller at this point, then? Doesn’t look like too bad of a job. Super Helpful
  8. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Understood. It was never an issue before so I’m curious why it popped up today. Not overheating anymore but now I’m hoping o haven’t been frying my impeller every time I ran it like that.
  9. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Update: ran it on muffs on the outdrive and having no temperature issues. Must be something wrong w my top down system. Crisis averted. An overheating boat is scary.
  10. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    I don’t run it w the RPMs at 1300. Just at idle before and never had any overheating issues. I also have a top down water system and run the hose through there.
  11. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    What do you recommend at this point?
  12. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    I did verify. Why would it overheat on land but not in the water? All I did was change out the thermostat and move a gasket but now the impeller is bad? How would that not have been picked up before when I had a different thermostat that was stuck open?
  13. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Update: replaced the new thermostat and I did have the top gasket in the wrong spot. Got up to temperature under load and stayed there. However, it started to overheat when I got it home and used a hose - never done that before. Is that normal?
  14. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    That’s also the exact video I pulled when I started this project, too. Great minds…
  15. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    I did put a layer of permatex on the bottom between the manifold and the first gasket - I wonder if that is affecting the communication. I’ll take it apart tomorrow and investigate.
  16. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    I will do both of those and get back to you. I’m also going to make sure I didn’t mess up the gasket on the thermostat placement. Thank you in advance.
  17. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Confirmed. It wasn’t until recently that the engine wouldn’t get up to temp and replacing the thermostat did not fix it while under load.
  18. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    Motor Serial Number OM663009. Thanks for the reply!
  19. D

    Mercruiser 5.0 Won’t Reach Operating Temp

    I have a 2007 Mercury engine that I just replaced the thermostat in since it wouldn’t reach operating temperature. It reached 160 just fine in the driveway but won’t get past 120 under load on the water still. What else could be causing this issue?
View older results
Top