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05-12-2015, 06:28 PM #1
mercury outboard oil pump removal
Got the plastic rod that removes the oil pump to run 50.1 can anybody that put one in tell me what's involved came with no instructions.was told to remove top and pull gear then install?any help would be appreciated.thanks.on a 200 mercury.
Last edited by terry1; 05-12-2015 at 06:30 PM.
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05-12-2015, 06:47 PM #2Oil Injection System Removal
The mercury oil injection system is a popular item to remove, especially given its reputation for failure, and inability to deliver reliably after 6500 rpm.
Remove oil resevoir, oil pump, mag pickup, pump drive shaft, then install plug in shaft hole. Remove oil hose off bottom of vapor seperator, plug hose, remove fitting on starboard side of the block where oil tank pressure hose is coming from, plug hole with pipe fitting either 1/8 or 1/4., Remove oil alarm box, and i think that's all. the plug for the pump shaft hole you will have to get from dealer. (12)
Mercury part number for the plastic block off plate is 43453 and the O-ring for that kit is 32509. Jay Smith Racing Engines also has a billet kit for doing this.
Finally it is recommended by several sources, that you keep the old oil pump gear on the crankshaft, as it provides crankcase volume, and if removed will cause that cylinder to be lean.
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05-12-2015, 10:30 PM #3
Thanks.
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05-13-2015, 08:54 AM #4Member
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I have a 95 mercury xri that I removed all the black boxes and oil system about 4 months ago. Search "1995 Mercury oil removal" and you will have pics and advice from numerous guys that have done this. Good luck.
1995 Ranger 392 - Mercury Black Max 200 xRI EFI
Oil Injection Deleted, Black Boxes Removed, New CDI Voltage Regs
Idle Timing - 1 AD, Max - 23 BD, TPS - .253, Stator tests good
Bosch Plugs BU8H, New Water Pump
0G129842