Abstract:
This research was motivated by the decrease in Sea Water Cooling System pressure in the
diesel generator on MV Rawabi 216, followed by an increase in engine and lube oil
temperatures, causing overheating and reducing diesel generator performance.
Operational data showed that the cooling system pressure decreased from 2.3–2.5 bar to
0.8–1.4 bar, while the freshwater temperature increased from 77–79°C to 104°C and the
lube oil temperature increased from 82–85°C to 119°C. Therefore, this study aimed to test
two hypotheses, namely the effect of Sea Water Cooling System pressure on diesel
generator performance (H1) and the effect of engine temperature on diesel generator
performance (H2). This study used a quantitative approach with observation and
documentation methods. Data were obtained from recording diesel generator operational
parameters in the Engine Control Room (ECR) during March 23–27, 2026, consisting of
20 observation data. Data analysis was conducted using IBM SPSS Statistics version 29
through Pearson correlation, multiple linear regression, coefficient of determination, and
hypothesis testing. The results showed that Sea Water Cooling System pressure had a very
strong negative relationship with diesel generator performance, with a correlation value
of -0.996 and significance value of 0.000 < 0.05, therefore H1 was accepted. Engine
temperature had a very strong positive correlation of 0.990, but partially it was not
significant with a significance value of 0.090 > 0.05, therefore H2 was rejected due to
multicollinearity. The coefficient of determination value of 99.3% indicated that both
variables affected diesel generator performance.
