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  1. 07-23-2018, 01:25 PM #1
    IAm4DaKing
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    Question 1998 Mercury 2+2 115 SERIAL- 0G664958

    Having issues with motor sputtering and not going above 2000 RPMS when its warmed up and been running about 10-15 minutes when my boat has 2 people on it with all my gear. And when I try to get on plane with 2 people I get a strong gas smell from exhaust. Gets up past 2000 RPMS by myself and on plane but it still sputters a little bit at 2K then goes up. Replaced stator, rectifier, and fuel filter with no change in performance. My next thing was maybe power packs? I was going to have a shop look at it but now they are out for another week and I want to see if i can dig into it myself and save some money if its something I can fix myself. Any help is greatly appreciated! Thanks guys!
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  2. JOE54
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    #2 07-23-2018, 04:13 PM
    check fuel pump diaphragm and boost pump diapram
    .................................................. ...the scariest thing in life is the unknown ...................................
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  3. IAm4DaKing
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    #3 07-23-2018, 04:30 PM
    Okay thank you. Ill look into it
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  4. Astro dave
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    #4 07-24-2018, 05:59 PM
    Quote Originally Posted by IAm4DaKing View Post
    Okay thank you. Ill look into it
    The secondary coils are not getting power had this happen to my motor . Follow the linkage and find the button that it contacts with the motor running push the button the rpm should increase if not you have a short.
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  5. JOE54
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    #5 07-25-2018, 06:36 AM
    interesting, DAVE would this button you speak of be on the boost pump
    .................................................. ...the scariest thing in life is the unknown ...................................
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  6. Astro dave
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    #6 07-25-2018, 01:12 PM
    I don’t remember where it was located . My boat is in the shop right now so I can’t look.
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  7. IAm4DaKing
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    #7 07-26-2018, 07:47 PM
    Thank you. Ill see what I can do
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  8. IAm4DaKing
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    #8 08-05-2018, 10:08 AM
    So my shop rebuilt the accelerator pump diaphragm and checked carbs out put new needles in and they all look good. My next step is testing the CD modules which are coils I believe. And I'm also going to replace fuel pump diaphragm.
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  9. JOE54
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    #9 08-06-2018, 06:43 AM
    .................................................. ...the scariest thing in life is the unknown ...................................
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  10. IAm4DaKing
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    #10 08-09-2018, 10:20 PM
    Replaced fuel pump diaphragms tonight. Old ones are in fine condition. So thats ruled out for any issue. I have a feeling its more of a fuel problem than an electronic issue. Tomorrow gonna test CD modules so that will help me
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  11. MNBen
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    #11 08-20-2018, 12:58 PM
    I have a 1997 Mariner 115 2+2 (ser:OG498217) on a 17' aluminum. It has been flawless for me since I acquired it in 2002. I removed the outboard last winter to complete transom replacement. I just got it in the water 8/18 and the motor stated up great, idle fine, and runs flawlessly up to about 2K rpm. I can bury the throttle, but nothing additional from the engine. Throttle cable adjustment is good, has spark, has compression, prop hub is good. Figure I'll start with the carb rebuild.
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  12. JOE54
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    #12 08-20-2018, 01:06 PM
    hey Ben might want start new thread on your engine JOE
    .................................................. ...the scariest thing in life is the unknown ...................................
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