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  1. M

    SALT BUILD UP IN MOTOR (HOW TO REMOVE or STOP)

    Hey everyone, I have noticed my temp rising and when flushing my "88" Twin 3.7LX Mercruisers motors with 460 hrs on them, after a good trip around the Islands (anacapa) I've noticed some little chunks of what looks like calcium or salt have come out of the exaust ports of my out drives, I can't...
  2. M

    Are these the same manifold??

    I have twin "88" 3.7LX Mercruisers and looking to replace the Manifolds and risers, I have one new manifold ((816219A1)) and found another ((816219C)) they look the same, but are they? Thanks for you help
  3. M

    Whats that differance between 3.7lx and 470?

    :confused: Hey Guy's, I'm trying to find out what the differance is between these motors, I have twin 3.7LX with 4 bbl carbs and have been looking for exaust manifolds and risers. I have found parts for 470 but do not know if they would work on my motors. Thanks for your help. Marauder 28 Twin
  4. M

    "88" mercruiser 3.7lx (Aftermarket exaust manifolds)

    :confused: Hi Guy's I'm in need of changing my Aluminum Exaust Manifolds and would like your input on The Aftermarket one I've been seeing on the internet for $799 vs $1000 plus for oem. Please let me know thanks Marauder 28 Twin
  5. M

    Need help with how to find antifreeze leaks?

    Hey Everyone, I have Twin "88" 3.7LX Mercruisers with 378 hours on them and the last 2 times I went out to the Islands (Anacapa) I've had antifreeze in my hull and starboard motor about a gallon low and port maybe a qt. I went home last trip and filled them up and ran them for about an hour at...
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