oil alarm sounding

[spareparts]

Ferm beat me to it, but i was going to say "get ready to premix"

[phatdaddy]

same thing happened to me this summer(93 150 mariner). there is no pump to fill the tank on the motor. crankcase pressure is used to move the oil to the small tank on the motor. i ran the large tank low and the level dropped in the small tank. when i filled the large tank i didn't "burp" the top tank. took it to a local mechanic and had him check the pump, it was fine. he then told me about burping the top tank. i was out on the water when the horn went off, i keep a gallon of oil on the boat and dumped it in the fuel tank at the first sound of the horn. ferm and apare are right, make sure you are running pre-mix while troubleshooting problem..

[Skools Out]

Originally Posted by spareparts

Ferm beat me to it, but i was going to say "get ready to premix"

and / or get ready to rebuild / replace

[steplift20]

thanks for the replys and the web site , its very informative, From what i see there are only 2 things being monitored, the oil tank on the motor and the sensor for the oil injection system, it could be a bad module, so first thing i did was to fill up the tank, next i an going to take out the tube from the oil tank and make sure the screen is clean, than i hope its ok but if i have to disconect the injection system how do you do it? what are the steps?

[spareparts]

remove the oil pump, pull the coupler out, then using a pair of needle nose pliers and pull the oil pump driven gear out, if you see melted plastic on the gear, you know whats going on. Pay attention to the coupler, it should fit loose within the hole, if its tight, you just found the cause. mercury finnaly figured out the coupler was swelling up and locking up the drive gear, they eliminated the sensor and went with a smaller coupler on late model 2.5 EFI's and carb motors

[phatdaddy]

Spare, doesn't merc make a "kit" to eliminate the oil pump? with a plate to block off the pump hole. or do you just pull the shaft and leave the pump in place? also what about the oil feed line to the fuel system?

[THEFERMANATOR]

Yep, you need to put the oil pump drive block off in place if you remove the driveshaft so that the bushing in the block doesn't fall out and go through the engine.