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  1. Replies
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    2.5L 150 Efi Mercury

    1999 150 EFI
    S# 0G803380

    Hey guys. I've tried this engine on 2 different boats with the same results. First the engine was on a Nitro 901 Cdx. 21 pitch prop. I could get maybe 50 mph with a load....
  2. Yesir, Thank you for the insight . I checked...

    Yesir,

    Thank you for the insight .
    I checked the compression on the engine and they were all between I think 112-115 psi

    Maybe something electrical tho I guess.

    Maybe I could run her wide...
  3. The hole shot is pretty bad in my opinion. Feels...

    The hole shot is pretty bad in my opinion. Feels like I'm running a 23 or 24 pitch prop or something, and if I'm loaded with a co angler the hole shot is terrible!
    Absolutely aweful.
    Takes forever...
  4. I forgot to add I have a 10 inch setback jack...

    I forgot to add I have a 10 inch setback jack plate as well.

    With a 21 pitch prop I just figured my rpm should atleast be close to 5400.

    To be honest.. with the history of poor performance on...
  5. 2005 Nitro 901 CDX poor performance

    I have a 2005 Nitro 901 CDX dual console
    It has a 150 Efi Mercury serial # 0G803380

    21 pitch Tempest
    Rpm- 5000 or so.
    Speed- 50 mph with just me and my gear.
    48 mph with 2 people...
  6. Yesir. I was thinking that would be my next...

    Yesir.
    I was thinking that would be my next step.
    Thank you
  7. I have not

    I have not
  8. 200 hp OX66----- Loss of power at W.O.T.

    Model#- VX200TLRD
    Mfg Date- 01/05
    2005 Skeeter bass boat 20'

    It idles rough and sometimes will shut off at idle if u don't give it a little throttle to keep it running.

    It will also loose...
  9. No one can tell me the answer to this question Yamaha ProV 150

    Model# 150TLRP

    How can I convert my 1991 ProV 150 into a 175?
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    1991 Yamaha 150 ProV into 175

    Can anyone tell me how to convert my 1991 150 ProV into a 175?
  11. I removed the heads and they are right.

    I removed the heads and they are right.
  12. Yes sir I forgot to mention the trigger and...

    Yes sir

    I forgot to mention the trigger and both switch boxes were replaced as well.
    Stator is stock though

    I also tried a different ECU yesterday evening .
    No change
  13. 150 EFI 2.5 Flooding port side after rebuild

    Hey guys.
    I have a 150 Mercury serial # 0G803380
    Manufacture date is June 1999

    The engine was recently rebuilt and is now flooding on the port side.
    Or at least that's what it seems.

    The man...
  14. Thank you all. I have scheduled to meet a...

    Thank you all.
    I have scheduled to meet a mercury tech from a town over at out local lake this coming Tuesday.
    I will keep you guys updated

    Thanks again
  15. I'm not looking for an answer that I like. I'm...

    I'm not looking for an answer that I like.
    I'm looking for an answer that fixes my dern engine.


    Go to other forums and you will be able to copy and paste a whole truck load of posts I've made...
  16. Well I'll ask again please good sir. Why is it...

    Well I'll ask again please good sir.

    Why is it limiting rpm at 5400?

    What could be the issue ?
  17. Ok Why is it limiting rpm at 5400?

    Ok

    Why is it limiting rpm at 5400?
  18. Im just grabbing at straws here. No idea...

    Im just grabbing at straws here.

    No idea what's wrong with this engine.
    I've had a couple mechanics look at it and no one can figure it out.

    But something has to be going on
  19. My words ? My words were it "sounded" like it...

    My words ?

    My words were it "sounded" like it hit a rev limiter.
    You yourself are a mechanic and may have heard different.

    What I heard did sound like it.
    But hell for all I know it was...
  20. The gauge is right. I have tried that. I...

    The gauge is right.

    I have tried that.

    I have also got a friend that hooked up his M.E.D.S. to it and we ran it.

    It was 5380 rpm by that.

    It didn't show any faults.
    Forgot to add that to...
  21. So as long as TPS % reaches 100% I'm good?

    So as long as TPS % reaches 100% I'm good?
  22. Just ran it with a 21 tempest. Waaayyy better...

    Just ran it with a 21 tempest.

    Waaayyy better hole shot

    5400 rpm wot
  23. It wasn't completely out of the water. The prop...

    It wasn't completely out of the water.
    The prop was kicking a rooster tail 30ft high.

    Like didn't just get the prop a foot away from touching water and goose it.

    Too scared to do that.
    ...
  24. Under norm circumstances no way I would ever...

    Under norm circumstances no way I would ever dream of doing that.

    Reving up without a load any at all is completely stupid.

    But what I did is eliminated the chances of it being a prop issue.
    ...
  25. Ouch isn't the word chief

    Ouch isn't the word chief
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