WARNING: Cancer - www.P65Warnings.ca.gov. Round shape, flywheel mount.. Put every foot-pound from your 8.1-liter Mercury MerCruiser right where it belongs-the prop shaft-with the Engine Coupler 98-8M0108208. Purpose-built for MCM 496 Mag and 496 HO sterndrives, this round, flywheel-mount coupler forms the silent link between your big-block V-8 and the Bravo drive, soaking up vibration while keeping alignment true.. Cast around a long, splined steel hub and bonded to high-durometer rubber, the assembly delivers two key advantages: it cushions hard throttle punches to protect gears, and it resists the heat that cooks lesser couplers during long cruisers or heavy-tow days. Each unit leaves the factory dynamically balanced, so you won't chase annoying buzz at mid-range rpm.. Why it pays to swap in OEM:. Exact spline fit-slides onto the crank without forcing; no guessing on depth.. High-temp rubber bond absorbs torsional shock and wards off premature tearing.. Factory-balanced hub keeps dri