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#1
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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
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#2
08-13-2009, 06:52 AM
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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?
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#3
08-13-2009, 02:19 PM
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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.
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