Offshoreonly.com - Big/Small block MerCruiser O2 sensors

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AmiableDave

03-09-2023 09:26 AM

Big/Small block MerCruiser O2 sensors

If you have a big block or small block mercruiser engine that has oxygen sensors pt# 8M2003959 and they go bad. You will be paying around $125 each.
On the other hand. You can buy the exact same oxygen sensor from GM pt# 12640453
https://cimg0.ibsrv.net/gimg/www.off...6019b12544.jpg
on eBay all day for $48. I found a dealer that sold them to me for $35 each.

SB	03-09-2023 09:35 AM

Great info, thanks.
Quick check, RockAuto and Amazon (not 3rd party) sell for $35-38 also.

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