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  1. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    Good morning, so yes I bought this as a special deal knowing about this error and the cost to replace parts, but with a huge gap between the price market and what I pay for it. hoping to sell it after enjoying the rest of the summer and keep an eye on OB, future question about which are the best...
  2. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    next time will be definitely outboard but.. I'm in the learning process of paying the fee here and there for be a newbie.. the question is should I buy a new check valve or use the same old ones... also, yesterday got an error in the trim sensor so I will try to clean it or hardly remplace it.
  3. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    Update, I ended called a mercury mechanic certificated, after connecting the computer he noticed too high pressure in water pressure due to a bad manifolds and riser .5 gph when the normal is around 2. so I ordered today new manifolds and risers (2100 $) ....it hurt. hoping that after this work...
  4. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    alldodge thanks! enjoy your grandson!!! have a great weekend!. I will keep thinking about what else could be... may be head gasket at this point. or new manifolds and riser but water moves there without issue. I saw you have the same motor on the chap 280? but with heat exchange?.. question...
  5. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    alldodge I just got home after all day working on the boat removed the crossover / the poppet valve / all the hose cleaned and sadly nothing changed . the crossover right now it clean as a new and from inside the holes I put some rust remover and cleaned (lot of dark water come out when put...
  6. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    reading everything again, yes from the crossover when the motor is on, a thin flow of water move from the crossover to the check valves.
  7. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    What do you mean from the bottom? the check valves? I couldn't took out the check valves (was glued I guess) but when I insert water in the main holes (where water goes and come to cool the exhaust) a thin flow of water comes out of the check valve. I calculate because the inner ball was...
  8. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    Alldodge yes you right for me too. something is clogged here there or maybe head gasket burned as louC suggest but I don’t know what! My first shot was manifold and riser I tried really hard to clean with acids brushes all the debris rust from the conductors cuz the parts were solid not weak ...
  9. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    No no alldodge that photo is actually the circulation water pump yesterday before put again. Right now I put again the original black hose from assembly to the water pump and noticed air bubbles from assembly to the thermostat in the kinked hose. Temp at idle went to 180 here at salt water...
  10. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    I didn’t disarm the crossover yet but sure I will do and will clean as I did with every single part I took out from this motor. thanks again alldodge for your support always
  11. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    Guys yesterday I took out the circulation water pump from the motor to see better inside . I tried cuz was so hard saw inside and yes inside are all the vanes (posted a YouTube video to show to you) At idle with garden hose and a bucket full of water the temp stays at 155 and the kinked clear...
  12. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    yes, I put a new thermostat in the crossover. circulation water pump ( 8m0116534 ... 370$) is the only thing I did not change when disarmed and but I checked if move smoothly and it did, I tried to check the vanes with a screwdriver and I couldn't .. anyways the last thing.. I will disarm the...
  13. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    LouC, yes I guess depending the brand you bought it. I started with one that I personally didn't like and then I purchased another that works much better and looks more solid as well. So today I made two tests before hit the water tomorrow if I could. 1st I put again only one original black...
  14. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    Yes Sir alpha is the first version.. and is what I got right now. About the valve I can’t use because if I put it at the bottom water entrance hose of the motor the raw impeller in the alpha steam drive I guess is going to burn out . That why I chose in my inexperience the dual flush rubber to...
  15. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    LouC yes your motor is running in another temperature at all.. your brother's boat is similar to mine if is the alpha 4.5 version, if it the bravo instead this motor has a heat exchanger. hope on water test got some good results.. I keep you posted.
  16. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    Yes! I saw that valve alldodge (what is more i have in my favorites but for this alpha model is not working ) For that one who want the valve.. https://www.amazon.com/gp/product/B005Q5M3UO/ref=ox_sc_saved_image_1?smid=ATVPDKIKX0DER&psc=1
  17. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    Professor Alldodge thanks so much for your time and the explication, to me and the rest of the people afterward to be taught. really helpful. I made some tests after these new things were installed.. with the new thermostat, and the clear hoses (a bit bigger than the originals), and leave the...
  18. leosmdp

    2018 Merc 4 stroke 6 hp - hard starter

    https://www.amazon.com/Gumout-800002230-Carb-Choke-Cleaner/dp/B005LD2C98?th=1 7 bucks. purchase that spray and clean it!
  19. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    alldogde thanks!, as you can see is also attached a garden hose connected to Dual Flow Rubber on the drive I only fill up with water to prevent some air suction. yes water is also above the impeller suction. yes I note the kinked but was impossible to turn is sooo hard that hose, also that hose...
  20. leosmdp

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    I will run some tests today with a couple of flushes with salt remover maybe I will try with vinegar and Dawn soap (as I saw in YouTube) I filled up a bin full of water to prevent air bubbles from entering the system. (The hot water from the engine (hot) will not be received by this container...
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