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  1. Merc 7.4L (454) MPI Fuel Pressure - iboats Boating Forums

    Feb 6, 2008 · Anyone know what the factory fuel pressure setting is on a 2001 Mercruiser 7.4L MPI at the fuel rail Schrader valve? I'm trying to diagnose a possible faulty (or clogged) …

  2. what is a mercruiser 188 - iboats Boating Forums

    Sep 26, 2013 · Re: what is a mercruiser 188 ^^^ Sir, you are confused. You're thinking of the mercruiser 470, 170, 180 series engines, the big 3.7 liter 4-cylinder. It does have all the …

  3. Replacing Exhaust Manifold and Riser on 3.0L - Tips Needed

    Aug 19, 2016 · The time has come to do some preventative maintenance and i'm planning on changing out the Exhaust Manifold and Riser on my 3.0L Mercruiser. The engine is a...

  4. Mercruiser trim/tilt wiring - iboats Boating Forums

    Aug 22, 2010 · Re: Mercruiser trim/tilt wiring For the trim limit switch, look for connectors with a purple/white wire and two blue/white wires. Polarity is not important. Adjust the TL switch to …

  5. Oil leaking our of "weep hole" in Alpha 1 lower unit.

    Jun 14, 2017 · I replaced the water pump assembly in the lower unit of my MerCruiser Alpha 1 sterndrive. The boat was running too warm so I decided to investigate and found the water …

  6. Mercruiser 470 Engine Spec and Mods - iboats Boating Forums

    Oct 2, 2006 · Re: Mercruiser 470 Engine Spec and Mods Most 470 owners are just happy if it keeps running It is a real bad pick for a HP motor Tommays

  7. Mercury MerCruiser Sterndrives & Engines - iboats Boating Forums

    Aug 7, 2009 · Mercury MerCruiser Sterndrives & Engines Sponsored by Quicksilver Propellers 1 2 3 … 4747 Next

  8. Installing A 90 Amp Fuse - iboats Boating Forums

    Aug 14, 2008 · The 90 amp fuse on the starter of my Mercruiser 5.0 needs to be replaced (my screw up :redface: ). Due to the configuration of my boat (Nautic Star 232 DC), this fuse is …

  9. 555 ECM faults | Boating Forum - iboats Boating Forums

    Jun 6, 2009 · Re: 555 ECM faults Do you have Mercruiser Manual #36, ECM 555 Diagnostics? I didn't see it under the Adults Only sticky, but I downloaded it from somewhere. If you have it, …

  10. How many drain plugs on a 4.3 v6 merc - iboats Boating Forums

    Oct 26, 2008 · Re: How many drain plugs on a 4.3 v6 merc Dalton, just did this for the first time today after speaking with a technician. There are 5 on my 4.3L Mercruiser (2006 Tahoe Ski …