Search results

  1. B

    Making my 150 hp a 175 hp

    Okay so I read that the 175hp black max has the same displacement as my 150hp black max (2.0L). How do they get an extra 25 horses from it??? Different carb jet sizes came to mind, what else???
  2. B

    threaded fuel fittings

    What can I use to keep threaded fuel fitting from leaking?? Would teflon work without being damaged by gasoline and possibly clogging my carb's inlet seats?? Thanks in advance
  3. B

    What year are these carbs

    From what year are WH-40 carbs??? I ask because Im looking to get a set of them to rob the floats out cause I need plastic carb floats.
  4. B

    carb float compatability

    Would the carb floats from a WH-40 carb work with my WH-12 carbs???
  5. B

    compression specs

    I have a 1980 150 hp merc. -im going to check compression this weekend. What are the specs? Also this is a thirty year old motor that runs and pushes my 20 footer to about 40 mph. With that in mind I don't expect my numbers to be perfect when I check them.
  6. B

    engine stalls at wot

    Can saturated or sticky(sticking to bottom of bowl so as to allow gas constantly into the bowl) floats cause my engine to stall at wot??? Thanks in advance.
  7. B

    alcohol resistant floats

    Where can I find alcohol resistant floats for wh-12 merc carbs. Where ever I've found them online they are no longer available. Thanks in advance
  8. B

    carb leaking thru vent jets

    My 1980 150 hp black max is leaking from the vent jets. I want to know if a sticking float can cause this?
  9. B

    displacement of 1980 150 hp black max

    Anyone here know how many liters the 1980 150 hp black max has? It has to be either 2 or 2.4 liters. Thanks in advance
  10. B

    how to test battery selector switch

    How can I test the battery selector switch without just bypassing??? Thanks in advance
  11. B

    battery selector switch

    Well after rebuilding the entire fuel system I went to crank up my 1980 150 hp black max and nothing happened. I had charged the batterys the night before, so I dont think the problem starts there. Im thinking its my battery selector switch (now I may be wrong) because none of my electronics or...
  12. B

    Just out of curiosity/spin on flywheel

    Does anyone know if the flywheel on a 1980 150 hp black max spins clockwise or counter clockwise?
  13. B

    torque for t-stat housing bolts

    Does anyone know how much torque the t-stat housing bolts need??? This is for a 1980 150 hp black max. Thanks
  14. B

    operating temp for 1980 150 hp black max

    I was wondering if anyone knew the operating temperature of a 1980 150 hp black max?
  15. B

    draining carbs after each use

    I have read in manuals that after each use the fuel line should be disconnected and the engine ran until it dies to burn up the remaining fuel in carbs etc. Is this good practice??? This is my first boat and I have just about finished overhauling the fuel system.
  16. B

    where to put inline fuel filter

    Should I install inline fuel filter before or after primer bulb? Original setup didn't have one.
  17. B

    Ethanol resistant fuel lines

    Okay so I'm overhauling the merc. I already purchased a line with primer bulb that is alcohol resistant. I want to know if fuel line stamped: sae 30r6 kx is alcohol resistant and also if fuel line stamped: es 1763 bombardier is alcohol resistant?
  18. B

    Block cooling lines on black max

    So I'm overhauling the black max big time. In my manual schematic it shows an external hose from poppet valve assembly that ultimately ends up dumping water out the tell tale. Well previous owner plugged that outlet at poppet valve. I need a pic of the correct setup so I can get that in order...
  19. B

    External cooling hose routing

    I'm trying to overhaul all the external lines on my 1980 150hp black max. I'm getting to the cooling lines and for some reason I think the previous owner had it wrong as I am comparing it to the schematic in my manual. If anyone has this similar motor could you please be kind enough to send me...
  20. B

    bleed hoses

    I am currently overhauling the fuel system on my 1980 150 hp black max. it has 6 lines that connect from different points on the block and then into the air silencer box. I want to know what it is these hoses do and what they carry (or what runs in them)??? So that I can replace them with the...
Top