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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    Ah - ok. I hadn't heard of that before, but that would be a great way to determine if the spark was strong enough (better than judging the color of the spark). I did finally get the compression gauge and found the compression to be 50-75psi.
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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    Yes! Verified that and I am getting spark at the plug (when holding against the engine block).
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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    Ok, roger - thanks, that's what I figured. Float seems to be working (fuel isn't continually overflowing and it is definitely getting fuel). I haven't been able to get a compression reading yet - still working on that. But yes, I've measured the spark gap (and replaced with a new spark plug)...
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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    I have played around with the idle adjust screw without any change in the motor being able to start. I checked the needle and it's in the middle/normal position. Do you think the needle position would cause the motor not to start or more specifically make it backfire like described in the...
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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    PVANV - Did I answer your question - did I give you what you were looking for? Is 1002201AK not the model number? Much thanks for any help.
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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    Were you able to view the diagrams I sent links to? I'm pretty sure each of those is not 'adjustable' in the sense that there's no overt adjustments that can be made for them in this particular carburetor. I'm not saying there isn't a way that they could be adjusted if you know what you're...
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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    I think the model number is 1002201AK as stated in the original post. As I mentioned, it's a Mercury engine, but I believe these are built by Tohatsu. The serial number is 0T705980 in case that helps. And here is a link which shows diagrams of different parts of the motor...
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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    Thanks for your reply. The rebuild kit was the same price for a new carb, so that's why I went that route. Earlier in the process I had dissembled the existing one to inspect but couldn't see any corrosion or anything wrong. I was pretty doubtful that the issue had to do with the carb at all...
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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    Thank you for your reply. I did not take apart or otherwise touch the reed valve. And I should have mentioned that I did try what you suggested re. flooded engine without luck.
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    2.5HP Mercury/Tohatsu/Nissan Outboard No Longer Starting

    Motor info: 2003 Mercury 2.5hp Model #1002201AK (I believe these motors are built by Tohatsu for both Mercury and Nissan) Problem: Outboard will no longer start, occasionally backfires History of Problem: I purchased this motor along with a 15ft RIB in 2019. The 2.5HP serves as an emergency...
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