Wow I have a 115 2008 merc, same problem. First thing I tried was stabilizer no luck, replaced both inline filters. Just last week my mechanic plugged into the computer, turns out 2 out of three fuel pumps were bad.. I should have told you to sit down before reAding this.
Also my air filter was completely disentegrated.. I had the exact same problem this year.. Let me know how you make out
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