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  1. 08-07-2022, 10:41 AM #1
    mattorschell
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    2006 Optimax 150hp Idles rough and dies in gear

    I have a 2006 optimax 150 SN 1B274973 and I noticed it idle in rough and it progressively got worse through out the day. Now it revs high when you start it and then dies. Won’t idle. If I do get it in gear before it dies it runs great at mid throttle to WOT. Lower RPMs in gear you can definitely feel it stumble. I do notice when looking in the intake it is dirty. No alarms at any time. Possible fuel Issue?? Please help I have a tournament this up coming weekend. Thanks
    Last edited by mattorschell; 08-07-2022 at 12:35 PM.
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  2. mattorschell
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    #2 08-07-2022, 08:41 PM
    Could it be a bad tracker valve? How do you test the tracker valve?
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  3. JOE54
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    #3 08-08-2022, 07:53 AM
    it sure could be ,and its the easiest to replace , is there fuel in air side of system , does fuel leak from direct injector bores in rail when rail is pulled away from head stbd side with inj left in head , or just replace /inspect tracker valve on stb rail they are the most common to fail , bad news is as of last friday MERC had 0 in stock good luck
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  4. mattorschell
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    #4 08-08-2022, 06:53 PM
    Tracker valve is cracked. Fuel also came out when I removed it. Not sure if that’s normal.
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  5. JOE54
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    #5 08-09-2022, 07:18 AM
    normal , hope you win tourny
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  6. EuropeanAM
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    #6 08-09-2022, 01:11 PM
    Replace tracker valve and see how it does (note- you may end up replacing the plugs as well, depending on how badly they were fouled up).


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
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  7. mattorschell
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    #7 08-09-2022, 07:41 PM
    Tracker valve fixed it. Thanks
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  8. JOE54
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    #8 08-10-2022, 07:44 AM
    .................................................. ...the scariest thing in life is the unknown ...................................
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  9. mperry
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    #9 08-14-2022, 03:48 PM
    Quote Originally Posted by mattorschell View Post
    I have a 2006 optimax 150 SN 1B274973 and I noticed it idle in rough and it progressively got worse through out the day. Now it revs high when you start it and then dies. Won’t idle. If I do get it in gear before it dies it runs great at mid throttle to WOT. Lower RPMs in gear you can definitely feel it stumble. I do notice when looking in the intake it is dirty. No alarms at any time. Possible fuel Issue?? Please help I have a tournament this up coming weekend. Thanks
    I was having the same issue. Changed plugs, replaced the impeller and housing and no change. I put about 2 oz of Sea Foam in the gas and ran it for about 15 minutes. That’s when the rough idle was actually a little worse. Ran it at idle speed for another 15 to 20 minutes and started running like a charm. Might be something to try. ����*♂️
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  10. JOE54
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    #10 08-15-2022, 07:38 AM
    SEA FOAM is good , but not good enough to repair a tracker valve
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  11. EuropeanAM
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    #11 08-15-2022, 10:53 AM
    +1


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