This process includes sealing off the gearcase of an outboard or sterndrive engine and introducing compressed air. The sealed unit is then monitored for strain loss over a selected interval. Any decline in strain signifies a breach within the seals or housing, suggesting potential water intrusion.
The importance of this diagnostic step lies in its means to proactively determine potential points earlier than they result in catastrophic engine failure. Water intrusion may cause corrosion of inner parts, harm gears, and compromise lubrication, finally leading to expensive repairs. Performing this check as a part of routine upkeep or pre-purchase inspection gives peace of thoughts and doubtlessly saves vital bills down the road.