black max 150 trouble

[willy]

ok franco i never heard of paste , was going to try the hose disconnect route first and see if i could see it. ithe mechanic has boat now since i brought it right back to him when it screwed up again. i just don't know what he'll come up with this time thinking i'll let him check for spark in cylinders on his machine and then bring it home before i get another royal reaming for god knows what then i'll have to use what ideas i get from you guys to start eliminating

[willy]

I'LL TELL YA FROM WHAT IT FELT AN SOUNDED LIKE TO ME I THOUGHT IT WAS THE FUEL PUMP. BUT MECHANIC SAID IT TESTED OK. CAN A FUEL PUMP TEST OK AND THEN PULL SHENANIGANS LIKE THAT

[Skools Out]

not usually they work on pulse off the motor so they usually either work or don't. They have a diaphram in them that works off the motors speed and pulse.

[willy]

THANKS SCHOOL TALKED TO MERC TECH A LITTLE WHILE AGO HE JUST TODAY PULLED BOAT IN TO START CHECKING. PROBABLY WONT HEAR ANYTHING UNTIL LATE TOMMROW. I'M THINKING IT IS NOT ELECTRICAL UNLESS THE NEW PARTS HE PUT IN ARE BAD :o :o :o AND I GUESS THATS POSSIBLE, BUT HE SAID I HAD FULL VOLTAGE TO EACH CYLINDER AND MOTOR RAN GREAT IN THE SHOP. BUT WHEN I GOT ON WATER AND ENGINE WAS UNDER LOAD THATS WHEN IT STARTS

[phester]

willy, I have only owned one merc. in roughly25yrs. of boating. I was quick to learn, regardless of how much gas you push through that motor,change the h20 seperater often.If manual says every 60 days, make it 30. M ercury carbs are very tempermental. Do what RAP said, take off filter and pour gas in a clean glass jar.You could of had water in the carbs and they may be fouled. What you are describing sounds like what my merc did...had the carbs rblt.,...problem solved and I never let it happen again

[willy]

OK PHESTER IF WATER DID GET IN CARBS AND I ELIMINATE HOW IT GOT IN THERE , WOULD THEY FLUSH OUT THEN WHEN RUN OR IS THAT A FULL REBUILD FOR SOME REASON

[phester]

willy, I had water in my gas tank which then obviously went into the motor. It would start up fine, idle fine,but when you hit the gas it would just stumble and would'nt get over 1800 rpms. I'm no mechanic outside of routine maintainance so I bought it in.The carbs were fouled from the salt water so the mech. boiled them out real good and reblt. kit good as new. I later installed an inline filter in addition to h20 sep.

[willy]

PHESTER HOW DID SALT WATER GET IN TANK ??? I'M WONDERING IF THAT IS MY PROBLEM. WHEN YOU HAD THAT PROBLEM WAS IT FULL TIME OR DID THE MOTOR RUN GREAT AND THEN ALL OF SUDDEN DECIDE TO SCREW UP

[phester]

it ran poorly one day,the next time was even worse, I don't recall for sure , but I don't think I left the ramp that time. It idled o.k. but as soon as I dropped it in gear it would stall. As far as water in the tank it was a combo. of things, vent for fuel tank was close to the water line, splashes coming over the transom etc. In addition to the carb rebuild I did have the contaminated fuel taken out of the tank and added a gasoline water absorber made by Starbrite. I guess it worked.

[willy]

IT SOUNDS SIMILAR, I GUESS IT IS POSS TO HAVE SEVERAL THINGS BITE YOU IN THE A$$ AT THE SAME TIME. NO SPARK TWO CYLINDERS SAME SIDE AND ALSO WATER IN TANK ??? ??? THANKS PHESTER. IF ANY OF YOU OTHER GUYS HAVE IDEAS I WOULD APPRECIATE IT I AM GOING TO GIVE THE TECH TOMMOROW TO LOOK AT IT THEN I'M JUST GOING TO GO AND GET IT CAN'T AFFORD ANOTHER BIG HIT