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    2002 Mercury 115HP 4-stroke, no compression on any cylinder!

    Working on a customer's 2002 115Hp Mercury 4-stroke EFI. Owner said it tried to start for the first time this year it tried to start then stopped and when he tried crank it again it sounded funny. When I cranked it over it sounded like I was cranking it with the spark plugs out! Removed the...
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    Mag 350 ski MPI, sticking piston rings?

    Engine is a Mercruiser Mag 350 Ski MPI with 300 hours since new connected to a v drive in a Tige ski boat. Engine is down on power & idles poorly. Installed a new set of plugs and carried out a compression check. Number 2, 3 & 5 cylinders only show 50 psi all the rest are at 170 psi. Squirted...
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    454 Magnum bogging on aceleration issues.

    Engine is a Mercruiser 453 Magnum, Bravo one sterndrive. Engine serial # OD 817258. Boat was bogging down on initial application of full throttle with backfiring through carb. Initially suspected carb problems (years since overhaul if ever). Overhauled the Weber carb cleaned and checked...
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