black max 150 trouble - Page 5

willy · #41 08-26-2005, 11:02 AM

I was going to see if there was one of the tank cleaning guys here central jersey. If it was'nt too expensive it might be a good way to go. Someone told me that the guys doing diesel fuel still do it and put you filtered fuel right back in. But gas fuel they don't want to do for some DEP reason

steplift20 · #42 08-28-2005, 12:50 PM

hold on before you go washing out your tank this is what you have to do
1st check your vent is it clean the one thats on the out side
ok its clean next no water in the fuel water sepperater
make sure of that by taking it out and dumping it
now that thats good you know you have an electrical problem but what is it?
ok this is what you have to do
the next time this happens you are going to remove the cowling from the motor and with the motor running you will remove one sparkplug wire from one spark plug to see if you have spark you will hopefully see that one side is not having a spark and the other side is so now you know its the switch box that is the problem
also it could be the stator but you should bring it back the the repair center and have them check it again mercury garranteis it for 1 year and i had to replace mine 2 time in the same year so they do go bad
but i would say its an electrical problem for sure
do what i said and let me know because i had a simullar problem i would lose half my cylinders and the oil alarm would go off and it was the switch box but you could only check it when it was happening
good luck

willy · #43 08-28-2005, 01:32 PM

Ok step thanks for advise but I was out yesterday testing motor and all is well. With mine it appeared several things decided to take a dump all at once. First of all the mechanic drained and flushed my tanks 20 gallons for me for $80. There was a little water in it but not much. Appeared the filter caught most of what was there and was getting clogged. He found a pin hole in the fuel line from pump to card and another from oil pump to carb replaced all lines inside cowl. When I first had problem I did not have spark on two cylinders on same side. Also the stator was not putting out whatever it is he measures so it was replaced. The switch box involved was replaced with new from merc and installed. THE PROBLEM WAS THE BOX HAD RIGHT NUMBER BUT THE NUMBER ON THE LITTLE STICKER ON BACK OF SWITCH WAS DIFFRENT AND WOULD NOT RUN RIGHT. >:( >:(. aGAIN REPLACED AND THE CORRECT BOX INSTALLED, BUT GUESS WHAT >:( >:( THAT ONE WASN'T PUTTING OUT RIGHT VOLTAGE BRAND NEW. So another new box obtained and worked fine. I love quality control ::) also the trigger was replaced, not because it was'nt working but apparently mercs in the 90's had aproblem with the wire insulation decaying. Mine had some bare spots hidden and if you rubbed it a little it would roll off the wire :o The mechanic also rebuilt the fuel pump because it might have gotten some water in it and it was original 1992 everything else looked good and other than coils and one switch box i'm all new under there. He and I spent time checking fuel lines and vent lines and pump ball all looked good. He told me if the fuel lines were going bad from the inside there would be fine and small pieces of the decaying material in the filters and I had none.

willy · #44 08-28-2005, 01:46 PM

sorry to be long winded but it's been a frustrating couple of weeks with mr. mercury here. I still have to get a new plastic cover for my fuel tank vent. Aparently mine has like a redundant arrangement with a small cover and piece inside a larger cover. The mechanic said ther was'nt much water in the tank but possibly the guy I bought the boat from used some formula as a dry gas or something not intended for marine use and that could of gelled in tank and caused blockage problem. He said a lot of guys use regular automotive products like dry gas in their boats but they are not meant for that and cause problems. I got to listen he has been a merc tech for 30 years. So I will see, ran boat for half hour in horrible wind and slop yesterday to test and ran like a new motor, no hesitation any more and lauches that heavy 18.5 like a sling shot ;D ;D ;D ;D

steplift20 · #45 08-28-2005, 07:43 PM

great i love to here that see you out side the inlet

reelapeelin · #46 08-28-2005, 10:46 PM

Don't apologize, willy...Man that's good stuff!!!...we all learn from each other's experience... ;)...glad you've got her goin'!!! ;D...