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  1. K

    Mariner 3 cyl, misses and RPMs limited

    This past weekend i tore the carbs off and inspected the reed valves. All reeds were in great condition and interior of engine looked spotless. After going through carbs and resetting float level and reinstalling them now I suddenly can not get below 2000 rpms and having bad backfires through...
  2. K

    Mariner 3 cyl, misses and RPMs limited

    Problem: Engine misses at various RPMs, can not get above 3-4000 RPMs. Info: Mercury Mariner 90Hp 3 cyl Serial ODOXXXXX 1 switchbox, 3 coils 18ft deep V, 17P prop. Entire Elec Sys is now CDI Tests done so far: Compression Test: 120/120/115 PSI Trigger: Passed all DVA tests Stator: Passed Ohm...
  3. K

    Mariner Manual questions- idle rpms all over

    Have 91' mariner 90hp 3 cyl. Serial 0DO80511 managed to find a service manual online that is for 0D283222 and above... so one up from the one I need. My question is this Im chasing a bad idle issue where after a link and sync the idle mixture screws do not seem to change much in the way of...
  4. K

    livewell pump water problems

    OK guys ill try to explain this one the best i can: i have a transom mounted livewell pump, that is screw directly into a thru hull fitting (well actually it is a bulkhead fitting used as a thru-hull). It is a attwood tsunami 750/800 one of those cant remember. Anyway i know it is getting...
  5. K

    mariner EXTREMLY high tach reading

    I have a 1991 mariner 90hp, and finally got the tach hooked up and took it out this weekend to get some numbers to give me an idea for a re prop. However at idle i was getting a reading of 1400-1500rpms, and at WOT the needle was buried well over 7k. Anyone have any ideas as to what this is? I...
  6. K

    regulator/rectifier question, mariner 90hp

    I have a 90HP mariner, 1991 model 3 cyl. This is the one with the regulator and rectifier all as one component. mercury part no 815279A2, or sierra no 18-5741.... my question is this, the voltage reg side is working great and maintaining a steady charge but i am not getting a signal to my tach...
  7. K

    90hp Mariner Gear Ratio?????

    I have a 1991 mercury /mariner 90hp 3cyl outboard.... serial #0D080511.... Can anyone here tell me what the gear ratio of this lower unit is? And what is the max WOT rpm rating? thanks
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