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  1. M

    Impeller Job - Mating Surface Corrosion

    This is very close to the site I use. It's the consumer site --- missing a lot of what a dealer can see. Might be better if you make an account? Don't know about that. Always search by serial number, many changes to some of this product over the years. This is part of the reason a good dealer...
  2. M

    Impeller Job - Mating Surface Corrosion

    821759A2 is a very old part number, Yellow ones had problems, you want the black one with 8 feet on the bottom --- it's covered in the manual. It will come with seal and O-ring installed. Just paint the bottom of the bottom gasket and the gear case where you removed the paint. Top gasket already...
  3. M

    Impeller Job - Mating Surface Corrosion

    Yes there is a gasket there. 1. replace yellow seal carrier, it's melted and a weak point. Clean driveshaft with sandpaper before installing new one. Pack the area between the seals with 2-4-C. 2. scrape loose paint with gasket scraper or razor blade. 3. paint that surface with perfect seal. 4...
  4. M

    MerCruiser 5.0 Carb Engine Compression Test, Two Piston came back with Zero

    I'm more of a diagnose it before disassemble it kind of guy. Leakdown test. Bring #6 to TDC (on the compression stroke) and put some compressed air thru the sparkplug hole. Listen at carb, oil fill and exhaust. Hear where the air is escaping, repeat for #5 If it's coming out of the oil fill, no...
  5. M

    Axius Gen 1 Removal

    Your welcome, happy to help when I can. Sorry but I don't have any recommendations on a tech in your area. I don't know what number you called but this is the number to call. The Consumer Support number is (920) 929-5040 I'm guessing that finding the right tech will be critical getting this...
  6. M

    Axius Gen 1 Removal

    I understand the need to feel safe driving the boat! But I'm not sure if you're going about it the right way. The Axius system must be serviced by trained people. Here is just one of the many warnings in the service manual for this system. It is imperative to return electronic modules and...
  7. M

    Mercruiser Motor identification

    you're welcome the pics don't show the crankshaft, if you haven't inspected it, you should
  8. M

    Axius Gen 1 Removal

    First I should post that I'm not an expert on Axius. I was a MerCruiser master tech for a dealer that sold 98% Volvo boats. We only sold 2 Axius boats, one never had issues and the other one's problems were solved with a call to tech support. My only real experience is going to all the classes...
  9. M

    Mercruiser Motor identification

    This is a 2018 motor that was installed in a 2018 HEYDAY boat and never registered. The last warranty repairs were done in 2021. The long block wasn't replaced under warranty. MerCruiser tells us that there are NO GM parts in this engine. When I said surely Merc must have used "off the shelf"...
  10. M

    Axius Gen 1 Removal

    I haven't helped people to remove it, but I have helped people to put it back after someone made the mistake of removing it! I would need engine serial numbers to help further. Each Generation and version has different issues.
  11. M

    Merc Smart Craft // 150 Four Stroke - Question

    I don’t have a lot of hands on experience with the new O/bs, so my mind is stuck in the old 2 strokes. Water pressure was the first thing I added to the ones I owned, but I always had an old speedometer and some pitot hose laying around so it was just another hole in the dash —- still have the...
  12. M

    Merc Smart Craft // 150 Four Stroke - Question

    Happy you got it sorted out! Well mostly I guess, You have "system" gauges. So the speedo is getting it's info straight from the engine ECMs Not sure what you have going on, the system will read 2 tanks, make sure you select "not installed" for tank 2. Other then that, you could try a master...
  13. M

    Merc Smart Craft // 150 Four Stroke - Question

    I don’t know. If it was me doing this. Both tachs.
  14. M

    Merc Smart Craft // 150 Four Stroke - Question

    ok thats what it should have done
  15. M

    Merc Smart Craft // 150 Four Stroke - Question

    What did the VV Mobil do when you connected it? Time to look under the dash (might have to cut a bunch of Ty-straps, it’s usually a mess of wires) and see what’s going on. Looking for any terminator resisters and to see how close it matches the diagram you posted.
  16. M

    Merc Smart Craft // 150 Four Stroke - Question

    On the engines, is the blue terminator resister plugged into the engine all by itself or is there. “y” harness? ——- should read yellow, not blue. The empty 3 pin system link connectors are normal and will always be there. They are for more gauges if you want to spend more $$$ with Mercury...
  17. M

    Merc Smart Craft // 150 Four Stroke - Question

    The diagram you posted is how this boat should have been cabled. Here is a link to the part number I posted earlier. https://www.mercruiserparts.com/893452a01-cable-asy-link The cable you purchased was for earlier SmartCraft systems. Other than costing 5X what the correct cable costs, it might...
  18. M

    Merc Smart Craft // 150 Four Stroke - Question

    update to this thread. Had to talk to Rinda today so I asked if TechMate or Diacom will change engine location assignment on the 70 pin ECM that O.P. has on their motors. Tech support assures me they will. After hanging up, I realized I forgot to ask about if they will also do the newest ones...
  19. M

    Trims down, not up, not solenoid?

    bypass or replace the trailer limit switch
  20. M

    Merc Smart Craft // 150 Four Stroke - Question

    Diacom would allow you to set engine placement on I/Os back with the MEFI ECMs. Don't think it will on this ECM, but don't know for sure. Never tried to hook up anything other then G3 to a Mercury Marine product since G3 came out. I'm just going by the O.P. saying "using a specific tool which I...
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