Recent content by Garrison395

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    MerCruiser 7.4L Flat Tappet

    Rygrego, Because, some oils meeting CK-4 standards have been found to lead to accelerated wear in their vehicles and the “WSS-M2C171-F1” spec sets a minimum threshold for ZDDP and phosphorus. Their position letter I believe also stated the CK-4 oils that are not approved were not recommended in...
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    MerCruiser 7.4L Flat Tappet

    🤣🤣🤣🤣🤣 Well it turns out this whole exercise was a big waste of time! 1996 was the model year they switched from Gen V to Gen VI. Finally looked up the serial number and it turns out she is roller, sweet! 0F809388 🤦🏻‍♂️
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    MerCruiser 7.4L Flat Tappet

    It is my limited understanding in marine lube the “corrosion resistance” umbrella encompasses alkalinity and oxidation in a machine that will be in storage more than used, as well as those subjected to a harsh environment. Although much more of a concern for our saltwater boat than this one, it...
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    MerCruiser 7.4L Flat Tappet

    Thanks, looking better all the time. Been steadily checking upgrades off the list. Sorted out the ground tackle situation today, wired a Blue Sea battery charging relay and switch so the stereo doesn’t kill the starting battery, some new led courtesy lights, installed a small bottom machine so I...
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    MerCruiser 7.4L Flat Tappet

    I do wish the specs were available, or a VOA was posted for some of the new catalytic compliant 25w-40’s. Think I will send in a sample at the end of the season on the current fill. If I go with a 15w-40 HDEO (most likely), think I will make sure it is on Ford’s approved list.
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    MerCruiser 7.4L Flat Tappet

    It does, but have read the corrosion resistance properties are less than ideal.
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    MerCruiser 7.4L Flat Tappet

    I have put many thousands of hours hauling wake-boarders around in a Malibu and tuna fishing in my saltwater boat with HDEO’s. Just rolled 300k on my 7.3 Excursion. History makes it hard for me to use anything else irrespective of price, but none have been 26 years old.
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    MerCruiser 7.4L Flat Tappet

    We recently purchased a 1996 Cobalt 232 with a 7.4L Merc. We houseboat at Lake Powell annually and wanted a big comfortable family cruiser to add to the mix. The boat is a time capsule and the maintenance records are extensive. She looks like she came off the factory floor yesterday. As the...
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