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    Mercury MCM165 6CYL 250CID Exhaust Riser for Holley Sniper

    Wondering if anyone has installed a Sniper on a Merc MCM165 6CYL 250CID and can share experiences. We've been able to mount the throttle body (TB) by shaving a small amount off of the bottom of the TB linkage. Have heard some people are running open loop without the O2 sensor but would like to...
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    Mercruiser 165 Sniper EFI Install

    Getting ready to install Holley Sniper EFI on a carbureted Mercruiser 165. I have purchased a CP Performance exhaust riser to allow proper fit of the O2 sensor. My question is where do I install the coolant sensor? Also any other guidance to installation of EFI appreciated.
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