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  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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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