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  1. J

    175 Blackmax & 150 Blackmax compatable parts??

    Good morning all! I currently have a '88? Mercury 175 HP EFI Black Max (S#0250967) and looking at buying a '89 150 HP "XR4 Magnum II" Black Max (S#0B303951) for parts, hopefully. My 175 may be an "XR4 Magnum" as well, not sure. Any chance alot of the parts between the 2 are...
  2. J

    Poppet valve shooting water

    Just installed brand new water pump kit, 2 new thermostats & new water line hoses due to high temp alarm I had last week, but now water is coming out of poppet valve weep hole, after installing these new cooling system parts. I did take the poppet valve apart after I installed new water pump...
  3. J

    Another high temp question

    Hope all are enjoying this 4th of July! Engine temp alarm pegged out (220) this morning which caused alarm to constantly beep. Immediately shut down & sat for 15 minutes or so until temp gauge read 180. After spending another 5 minutes to get it to crank, I headed for the boat ramp at about...
  4. J

    Gauges powered off of accessory switch

    Starting to go through the rats nest of electrical wires previous owners installed on my boat & have a question. The water pressure & temp gauge get powered by an accessory switch on the console. Not sure yet if speedometer does as well, fuel gauge is disconnected so unsure their also...
  5. J

    SELOC manual confusion

    Hello all! Great forum to come across! First post so please bear with me. I recently purchased a 1986 Fiberking Bomber with a 1986 Mercury Blackmax 150 HP, 2 cycle engine. I purchased a SELOC service manual (to hopefully do all my own maintenance) but can not figure out which model number...
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