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  1. Dukedog

    1985 Mercury Black Max oil alarm >3k RPM

    your motor has a 16 amp system with separate reg and rectifier.. tha 40 amp stuff started in '89 with a single water cooled reg/rect... that changed to tha two 20 amp reg/rect in '92... tha oiler information pretty much remains tha same thru all tha years up until '02..... tha oiler module...
  2. Dukedog

    No start good solenoid

    probably... all tha big motors (only ones i've dealt with) do...
  3. Dukedog

    Mercury Oil Injection

    best ta delete tha oiler.. if ya gonna try ta keep it mix your fuel at 100 ta 1 while ya try ta figure out whats causin' tha alarm........ jmo
  4. Dukedog

    Mariner 150hp 2.5L Overheating – Need Advice

    sounds like something goin' on with tha pump or tha poppet is stuck wide open............ thats tha way a factory high performance hot rod runs!
  5. Dukedog

    1980'ish black max 150 losing all power after running for 30 minutes

    go to tha auto store.. buy tha cheapest electric fuel pump (3 ta 7 lb output) for a carbed car motor.. connect it as close to tha tank as possible.. it can jus be hangin' free for now.. supply side of pump go straight (no bulb) to tha carb bib that feeds them all.. plug off all lines goin to and...
  6. Dukedog

    Mariner 150hp 2.5L Overheating – Need Advice

    'bout 4 (3 @ very min.) ta 7/8 at idle.. 14 to 'bout 21 max at speed.. preferably 14/18.. gauge will show actual pressure (pump condition), any type blockage and how tha poppet is working.. theses are my opinion only and worked for many years.. you may have one of those "ya gotta be here" ta do...
  7. Dukedog

    Old Mercury 175 V6 carb issues

    https://www.youtube.com/results?search_query=rebuilding+a+WH+series+mercury+carburetor all wh series are basically tha same as for tha way they are rebuilt.. if yours are still factory '76 models you need ta find a set of later wh series.. tha old ones still have tha "round floats" that are...
  8. Dukedog

    Mariner 150hp 2.5L Overheating – Need Advice

    first its a 2.4.. first 2.5 was letter "d" in '91... did you jus change tha impeller?.. needs ta be a complete water pump kit.. you need a water pressure gauge ta be able to diagnose easier.. it will pretty much tell all. no photos showin' on my computer?.. look for any small cracks on both...
  9. Dukedog

    1980'ish black max 150 losing all power after running for 30 minutes

    (y)
  10. Dukedog

    Water flow question

    good ta know what motor ya have???
  11. Dukedog

    Trying to find out what engine - Need help

    second diget is letter on all of tha V6 mercs... started with A many years ago.... tha originals, 1976 till 'bout '79/'80 there 'bouts had 7 numbers.. then they changed tha first number to a letter.. then they added tha 0 in front of tha letter.. tha letters A, B, C ended with tha block change...
  12. Dukedog

    Trying to find out what engine - Need help

    its a '95 200 efi.. tha number is 0G230926.... https://www.crowleymarine.com/mercury/oem-parts
  13. Dukedog

    1989 Mercury 175 hp Black Max symptoms of Hydraulic like issues on starting at times

    first thing would be ta see if its still had tha idle stablizer on it.. if it does you need ta get rid of it....
  14. Dukedog

    97 Merc 200 carb, slow to plane out and no top end

    covers several motors so its a big file..............
  15. Dukedog

    Spark plug location on coils

    1,2,3... top ta bottom.. same as cylinders.
  16. Dukedog

    97 Merc 200 carb, slow to plane out and no top end

    send me an email address and i'll send ya an oem manual in pdf.. will tell how ta do 'bout anything with your motor....
  17. Dukedog

    1985 Mariner 150 Magnum control box

    yes.......
  18. Dukedog

    97 Merc 200 carb, slow to plane out and no top end

    check stator....
  19. Dukedog

    Mercury Blackmax power trim pump

    hard ta say from a "keyboard"???.. usually they work or they don't!.. ya might clean it up (wiring and connections, 'specially grounds) and see what it does???................
  20. Dukedog

    Mercury Blackmax power trim pump

    that one doesn't have 'em.. some will and some won't be included.. depends on tha seller.. they all will need to go thru solenoids..
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