4.0 OUTBOARD INSTALLATION 29CXO300 OWNER’S MANUAL
CAUTION
Water or other contamination in the fuel supply can clog the fuel system and damage your
outboard(s). Take care to avoid water or contaminant ingress into your fuel tank and familiarize
yourself with the maintenance schedule (see section 6.1) for the fuel system.
Powerhead oil
Cox Powertrain recommends the use of Shell Rotella T6 5W40 engine oil and Shell Rimula.
The powerhead oil must be fully synthetic and comply to minimum PI service classification of CI-4
CAUTION
The use of powerhead oil failing to meet the above specifications can affect your outboard’s
performance and longevity and may invalidate your warranty.
Transmission oil
Cox Powertrain recommends the use of Shell Spirax S3 AX gear oil. The transmission oil must comply
with the SAE 80W90 viscosity standard and API service classification GL-5.
CAUTION
The use of transmission oil failing to meet the above specifications can affect your outboard’s
performance and longevity and invalidate your warranty.
Please consult an authorized Cox Powertrain dealer for oil product recommendations.