Patent ID: 8370009

Claim:
A system for monitoring oil condition, comprising: a marine powertrain provided with a marine engine and a gear casing containing an oil and a gas; an engine speed sensor that generates an output value, which indicates a speed of the marine engine; an oil sensor that generates an output value, which indicates a condition of the oil; one or more electronics, which: receive the output value from the oil sensor; receive the output value from the engine speed sensor; and selectively monitor the condition of the oil according to whether the marine engine is operating at a speed that is less than an engine speed threshold value, which denotes a speed of the marine engine at which the oil and the gas form an aerated oil and gas mixture, by generating a signal indicating the occurrence of a fault condition concerning an unacceptable condition of the oil only where the fault condition is triggered by an oil sensor output value generated while the marine engine is operating at a speed that is less than the engine speed threshold value.