MerCruiser Risers & Manifold Clean Up Process We are going to clean up the MerCruiser Risers & Manifold. This is in preparation for getting the Cylinder heads back from the Machinist. Additionally, this is going to require a few items to start. Flathead Screw Driver Razor Blade(s) Plastic Steel Safety & Scraping 3M Scotch Brite 18730 & Drill Tap/Chase 1/4-20 Penetrating Oil / Rust Preventer Dust Mask Gloves Separating the…