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    Mercruiser 3.0 No Spark issues

    One other thing I "changed" is that when I was checking the fuel pickup, the tube was screwed into the tank only hand tight. When I put it back in I tightened it a bit more snugly. Is this a potential area for an air leak into the line and should I use some sealant on the treads?
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    Mercruiser 3.0 No Spark issues

    As dubs mentioned it is a more inconsistent rattle vs a knock or pinging sound. The BB in a tin can noise is no longer present that I described when originally starting the thread, whether that is due to higher octane fuel or getting my timing sorted out I'm not sure. Anyways, I will continue to...
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    Mercruiser 3.0 No Spark issues

    Just for kicks here is a video of the motor running without the cover to hear it better. I can hear a bit of racket when I throttle up, mostly noticeable in the last couple seconds of video. I might be overthinking the sound but hard to tell what it is https://photos.app.goo.gl/8x63zJ9wPhPXunDN9
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    Mercruiser 3.0 No Spark issues

    Thanks Chris I'll have a look tomorrow and update
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    Mercruiser 3.0 No Spark issues

    Will do
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    Mercruiser 3.0 No Spark issues

    Thanks Chris will look into getting one
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    Mercruiser 3.0 No Spark issues

    The PO stated that he replaced the carb so it's possible the jetting isn't to spec. How much would you jet up?
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    Mercruiser 3.0 No Spark issues

    Okay, so timing is good. And yes the plugs have about an hour or two total on them. They're practically brand new. Think it's safe to just run the boat for a bit now? I will add that on the first acceleration of the day out of no wake, it will bog under immediate throttle. If you ease into...
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    Mercruiser 3.0 No Spark issues

    A few plug pics after a high throttle / WOT run. I still hear some chatter / rattle at higher RPMs. Not sure if it really is knock or not
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    Mercruiser 3.0 No Spark issues

    Was able to get out with my digital timing light to check advance. I have base timing set at 1BTDC according to this timing tab. At 2600 RPM with my timing gun set to 23 degrees, the timing mark was showing around 8BTDC . When I turned my timing gun to 28 degrees , the timing mark was about on...
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    Mercruiser 3.0 No Spark issues

    I should be getting out with the digital timing light in the next day or two to check the advance. In the meantime I pulled the fuel pickup to check for any blockages and check the anti-siphon valve. The valve is moving freely, however, there is no filter in the pickup tube. Is this a cause for...
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    Mercruiser 3.0 No Spark issues

    Thanks guys, just ordered OEM transom seal repair kit from quicksilver. Digital timing light coming this weekend will update with the advance numbers and try a higher octane fuel for troubleshooting purposes
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    Mercruiser 3.0 No Spark issues

    Firing order is correct, double checked when I installed new dist cap. I can try some sandpaper but it is a bit rusted as well.. Was just going off the notches in relation to the manual. As for the leak, I inspected my bellows and noticed some light cracking. Do these need to be replaced? The...
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    Mercruiser 3.0 No Spark issues

    I also managed to get this still image from a video I took. Here you can see my timing mark, this is where I set it in base timing and still have pinging.
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    Mercruiser 3.0 No Spark issues

    Hmm, my timing tab looks slightly different than that one and I used this diagram from the manual. If I was supposed to use the diagram above my base timing would be one degree advanced... Motor is a 91. I can try to retard it by a degree and see how it runs unless someone knows for sure which...
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    Mercruiser 3.0 No Spark issues

    Great explanation thank you!
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    Mercruiser 3.0 No Spark issues

    Will get a digital light to check advance. PO drained fuel and put fresh in it he said. When I replaced the filter I poured some into a glass and it looked ok, it all evaporated out and didn't see any water left. No major gunk but wasn't crystal clear. Carb screen was very clean.
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    Mercruiser 3.0 No Spark issues

    The pinging starts right at 9-10 seconds but I agree it is hard to hear. Sounds like bbs in a tin can. I tried checking the timing advance but I need to read up more on how to check the total timing at 23 degrees. From what I can see the timing tab doesn't go that far BTDC so I am unsure how I...
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    Mercruiser 3.0 No Spark issues

    Side note: Is this too much water out of the bilge after a few hours on the water? Seems to accumulate more with riding. https://photos.app.goo.gl/nzmQUaYqQgCN1w8LA
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    Mercruiser 3.0 No Spark issues

    Got the dongle in and got out to set base timing. Set at 1BTDC as per my engine serial. Still have the pinging at WOT, anything up to about 80 percent throttle is golden and I cruised at 70 percent for a while with no issues. Not that I will ride at WOT often/ever but it still irks me that it...
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