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  1. 03-27-2020, 08:06 AM #1
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    rgsauger
    rgsauger is offline 7000 RPM
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    Breaking in rings on a 2.4 V200 chrome Merc

    Hi fellows. So I have read ALL KIND of stuff on here about breaking in motors and see 10-20 hours of varied RPM's and heavy oil and such as a common theme.

    If I only put in new rings on my stock Merc pistons in my chrome mota, does this long break-in apply again? (Would manually scuff the bores with green scotchbrite)

    thanks
    1990 Shadow bass boat w/ 2.4 200 Merc. Totally resto'd boat and love it!
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  2. 03-27-2020, 08:47 AM #2
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    seansbaja1982
    seansbaja1982 is offline 5000 RPM
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    Don't scuff bores per shop manual, Put in new rings, check bores for taper, vary speeds for 2 hours and then run it.
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  4. 03-27-2020, 10:44 AM #3
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    Dave Strong
    Dave Strong is offline Screaming And Flying!
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    Unless a very low hour motor it probably needs more than just rings, would bet pistons are worn beyond spec. Skirts and ring lands.

    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
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  6. 03-27-2020, 11:13 AM #4
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    rgsauger
    rgsauger is offline 7000 RPM
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    Fair points on wear. I'll check that. I need to do another compression check since I decarbed it
    1990 Shadow bass boat w/ 2.4 200 Merc. Totally resto'd boat and love it!
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