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All of the Mercurys are cataloged by serial number. Let me get the serial number off of yours so I can run it and see which igntiion system you have, and pull the correct books.
Okay no problem, there are no time limits here.
I'm attaching a file to this response it explains how to go through the ignition system on this engine. Give it a read. If you have any questions on the steps, or need clarifying as to how it works, just let me know and I will be happy to explain it. When you test it, you need to test it when the engine actually will not start. If you do have an ignition component issue you will find it via the tests. If it all checks out then the problem is going to be in the carb. There is either a little bit of dirt in it, or the float inside of it is sticking. And that would have to come off to be rebuilt.
I think that should do it. But I work for tips so I do want to make sure you are happy with my service before you go. If you had a further question on the issue by all means feel free to ask. If not, Just in case you do not understand the way the website works (and some folks do not). You do have to put forth a positive rating in order for it to credit me for helping you. When ratings are not done, the website simply keeps your deposit and they will not credit me. The ratings box is located at the top of the screen. To rate, you must select the star you wish and also confirm it. Please let me know if you run into any problems or errors when trying to do it. If you do have a problem, or if you can not see the ratings box which is at the top of the screen. Please reply back "I rate Jason's service _______" and fill in the blank.
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Hi Dmitry, before we jump all over the place. Did you get a timing light or adjustable gap spark tester to see if the engine was definitely loosing spark, or definitely has it? We need an absolute thumbs up or thumbs down on that.
There really isn't a primer circuit on the engine. It uses a standard plate style choke that restricts air when the choke is engaged. Other than that there is an accelerator pump on the carb. (which is different than what an primer is on other styles of outboards). All that does is give a squirt of fuel each time the throttle is turned up quickly.
What picture or website are you looking at, do you have a link to it?
That is the accelerator pump I was talking about. It is part of it.
It's all part of the same accceleration pump circuit. It would not be causing the issue.
It is not part of the issue. it wouldn't cause it. If there was a problem there the engine would be hard to start when cold.
You are very welcome