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  1. J

    My 78 merc 6 cyl in line wont fire w/o carb cleaner; boat not wet and no fish ye

    Well you guys helped me a lof in my schooling on Merc's, thanks. It is a s/n 4848057.<br />Once I get carb cleaner it will fire, and also when is hot. One engine cools down it won' :o :confused: <br />When it fires with the help of the cleaner, and it runs, I notice it misses at times when...
  2. J

    mercury 78 throttle adjustment 90HP, 6inline

    I have this 6Cyl thunderbolt II with 3 carbs and distributor, s/n4848057. It has the max spark, iddle adjustment, but no throttle stop screw.<br />The plastic linkage between the carbs has slots at the mounting. I reset these to obtain some clearance. Should I add a screw to obtain some fixed...
  3. J

    NOT CHARGING BATTERY; TACH NO RPM

    My old Merc L-6,90HP outboard , s/n 848057, a 1978 I think. Well The New tach. does not read anything; and the new voltage meter does not increase when engine is running. Checked continuity from Tach gauge signal wire connection to rectifier. I run all the tests on rectifier for continuity and...
  4. J

    Mercury Ignition timing troubles

    This 90 HP Mercury 78 Thunderbolt 6 cyl in line came separated from the boat.<br />The timing is off. The spark plugs are non gap type.<br />The pointer is a wire. the wire aligns to TDC when cylinder is at top nearest the plug<br />TDC is at the wire, and the distributor pulley to cyl # 1.<br...
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