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  1. A

    very rough idle

    I have a 1986 mercruiser 140, 4 cylinder I/O 181 cubic inch and the idle is very rough I put new spark plug wires on and distributer cap. the engine runs smooth after I warm it up for 10 minutes but hesitates when you punch it. new plugs also.
  2. A

    water leakage

    I have a 1986 Mercruiser 140 hp. serial #0A681921, or B403724 MCM 140 Transom Assembly.<br />there is a huge leak from behind the flywheel and the wheel is wobbly when I take off the belt. I think the shaft is loose? how can I fix this and what is a good repair manual to use to do this job?<br...
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