THE RIGHT STUFF
Witness Marks Steve Zimmerman
This Fleming 58 highlights several best practices. The machine screws and nuts that secure the engine mounts in place must not move and loosen despite engine vibration and temperature variations. Locking washers have been installed, and once properly torqued, a yellow witness mark has been applied. Any fastener rotation will displace the yellow marker, highlighting a problem.
The engine mounts have been shimmed, or raised up above the supporting structure. The shim has been carefully machined from stainless steel, with ample radii and fillets to eliminate any sharp corners that can become stress concentrations. Engine-mount shims should always be fabricated from a material that will not compress under the weight of the engine.
The black generator fuel hose on the lower right has been secured with a P-clip to prevent it from chafing on the edge of the oil-change pump. Just above the hose you can see a neat bundle of green 8-gauge wire for the bonding system. Bonding system wires must not be daisychained from one fitting to the next—a practice that creates cumulative resistance in the circuit. The bundle shows wires from each underwater component connecting to a main bonding strap. One small area of focus, but many examples of the Right Stuff.