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  1. 06-12-2017, 04:59 PM #1
    chriskale
    chriskale is offline
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    2001 Merc 225efi TPS and butterflies

    0t364621.

    While checking my engine, I noticed my TPS was I'm spec at idle but wouldn't achieve 3.8 +/- .25 at WOT. After more looking I noticed the intake butterflies were no where near fully opened at WOT either. To make a long story short, I adjusted the bump screw to allow the butterflies to open more and now achieve TPS spec. at idle and Wot. Does what I did seem legit? It's an old boat and a bought the motor second hand... Any reason they would have had it set that way to begin with? Thanks in advance.
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  2. EuropeanAM
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    #2 06-20-2017, 01:00 PM
    No real reason for this serial number, unless they were attempting to limit power output "mechanically".


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