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-   -   Mercruiser 'blue' block and manifold plugs - what thread? (https://www.offshoreonly.com/forums/general-boating-discussion/377451-mercruiser-blue-block-manifold-plugs-what-thread.html)

bajaman 10-21-2022 05:39 AM
On my other Baja, it had a Yamaha Hydra-Drive, a 454 cid Chevy marinized by Yamaha, and all the drain "plugs" were petcocks that you turned a half to full turn and got full flow. I wish Mercruiser had something similar...especially for the Cool Fuel II system...THAT plug is a ***** to get to!


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