SUZUKI SCREW 6X25 09116-06121 REC09116-06121

Function and technical context

This M6×25 screw with reference 09116-06121 is a structural fixing element used in multiple points of the outboard engine, intervening in the assembly of covers, supports, system covers and auxiliary components in both DT two-stroke engines and the Suzuki DF four-stroke range. Its function is to guarantee a firm and watertight connection between parts that, subjected to constant vibrations, water pressure and thermal changes typical of the marine environment, require a screw with the exact dimensions and specifications provided by the manufacturer. The use of a screw with incorrect measurements can cause looseness, loss of tightness, damage to threads or the detachment of critical components during navigation, with the safety consequences that this implies.

When to replace this part?

Set screws on marine engines should be inspected at every seasonal maintenance, as galvanic corrosion, exposure to salt water and prolonged vibration cycles can weaken the metal, corrode the head or damage the thread, preventing proper tightening. The most common symptoms are rusty or rounded heads, worn threads, inability to achieve the specified tightening torque or presence of play in the joint they secure. Preventively replacing any screws with signs of deterioration during maintenance on land avoids breakdowns and emergency interventions with the engine out of service at sea.