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  1. What are the steps for diagnosing a bad...

    What are the steps for diagnosing a bad alternator and or fusible link?
    Please walk me through the details of the steps.
    Engine running or off?
    Key in the on position, or off.
    Which leads are...
  2. How can I use a multimeter to check to see if the...

    How can I use a multimeter to check to see if the alternator is putting out proper voltage? Also, how can I check if the fusible link is bad?
  3. “Battery” error on smart craft. Need help diagnosing.

    Smart Craft “Battery” error.
    What does this typically indicate?


    I have twin 2004, 150 Optimaxs.
    Two batteries, one for each motor.


    Reconnected wires and charged batteries yesterday,...
  4. I don't think the bottom one, 4.00", has the...

    I don't think the bottom one, 4.00", has the radius. I am changing an oil pump and just pulled the lines, no radius. So unless someone as already been in there and changed them, no radius on the...
  5. Mercury Zip Ties, which ones have the radius on the head?

    Doing some work and i am finding three different size zip ties for holding tubes to nipples.

    69355, Tie Strap 5.50"
    816311T, Tie Strap 8.00"
    56762, Tie Strap 4.00"

    Which ones have the radius?...
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    Pulled lower cowlings and removed to inspect the...

    Pulled lower cowlings and removed to inspect the compressor strainer, it was very dirty. Not completely clogged, but restricted water flow for sure. This might be the reason for the failure.
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    Pulled the air supply line from the rail and...

    Pulled the air supply line from the rail and compressor. Inspected both ends for metal flakes, found nothing.
    Pulled a string through the hose and tied a bore patch from a rifle cleaning kit and...
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    Pulled the top end off and it's clean of metal,...

    Pulled the top end off and it's clean of metal, some dirty oil residue, but i guess that would be expected from a 17 year old compressor. See pics added above.
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    Compressor failed, my turn in the barrel.

    457702457703457704457705457654457653So, my port engine started to loose rpm’s and then stopped running. I inspected the motor and found my compressor had failed. Upon further investigation, the brass...
  10. Here is the Mercury Service Bulletin, 2002-22...

    Here is the Mercury Service Bulletin, 2002-22 that references the plug and gap change for this series of Optimax motors.
    It took 4-5 calls to Mercury Marine before i found a guy curious enough to...
  11. I don't doubt that Don has current and up to date...

    I don't doubt that Don has current and up to date information. I have utilized his expertise in the past and he has not been wrong yet.
    The information i received from Mercury didn't just come from...
  12. I have not pulled them to see the gap. I have 12...

    I have not pulled them to see the gap. I have 12 plugs to pull and gap, so i prefer to do this at my bench instead of at the marina while winterizing. I do remember going through this drill a handful...
  13. Silverfox579 The Mercury customer service rep...

    Silverfox579
    The Mercury customer service rep admitted that there is confusion. She also said she was going to research this and get to the bottom of it from the Mercury Side, admitting that she...
  14. I completely Agree with you, but why would...

    I completely Agree with you, but why would mercury do the research and then come back with a different gapping? They actually built the motor, and made the recommended changes to plugs and gaps, so...
  15. So, I called back to mercury and voiced my...

    So, I called back to mercury and voiced my concern over the mixed info on plugs and plug gaps for my motor. The customer service lady took my info and promised to get me an answer.
    Here is the...
  16. 2004, 150 Optimax / SN - OT946111 & OT973175 Plug Gap

    So, i called Mercury Customer Service to confirm the plug gap for my NGK, Lazer Iridium Plugs, IZFR5G.
    Mercury gave me the Plug Number IZRF5G-11 as the proper plug and the gap of 1.1mm or .043".
    ...
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    I wouldn’t worry too much about a little marbling...

    I wouldn’t worry too much about a little marbling in the oil. The water will separate and lay below the gear lube. If you had enough to worry about, it would have poured out before any lube drained...
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    Mercury scam tool options

    I am looking at options for diagnostic scan tools for a pair of 2004, 150hp optimax.
    i see the CDI Meds, mercury DDT units and aftermarket scan tools like techmate pro. What are people using? And...
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    Mercury scan tool options.

    I am looking at options for diagnostic scan tools for a pair of 2004, 150hp optimax.
    i see the CDI Meds, mercury DDT units and aftermarket scan tools like techmate pro. What are people using? And...
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    Same set up on my rails. Port side, top valve is...

    Same set up on my rails. Port side, top valve is fuel and side one is air.
    The brass Schrader fuel valve assembly is held into the rail by a stainless steel bracket held in with two Allen head...
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    Pics of the oil pump with drops of oil and using...

    Pics of the oil pump with drops of oil and using the UV light.
    https://pix.sfly.com/PZR85g
    https://pix.sfly.com/JBXfoS
    https://pix.sfly.com/u1bWAn
    https://pix.sfly.com/Gtck9S
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    OK, took my new gauge set and ran an air/fuel...

    OK, took my new gauge set and ran an air/fuel pressure check per don's recommendations.
    Here are my results.
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    Can’t post pictures in posts

    Why won’t the pictures I upload show on my posts? I am following the steps and it seems to take the file. I hit save and nothing shows. Tried from computer and iPhone, nothing.
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    Yes, as am I. Found a decent set of oil filled...

    Yes, as am I. Found a decent set of oil filled gauges for about 50 bucks each at McMaster Carr industrial supply, https://www.mcmaster.com/#3795K13 Also found a pair of fuel injector gauges at tool...
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    As I suspected, and now 125 lighter in the...

    As I suspected, and now 125 lighter in the wallet. he charged me an hour shop time to test pressure and then told me that his gauges might need calibrated. he's my only local merc certified guy,...
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