Chrysler 100, 115 and 140 HP Outboard Motors Service Manual, OB 3439, Page 12Get this manual
Section
_ GENERAL SERVICE INFORMATION
MOTOR IDENTIFICATION
Figure shows the motor serial number and model number, located on the identification plate attached to the support plateAlways use these numbers in correspondence to identify the motor and ensure that correct parts are obtained when ordered
Fuel SelectionAutomotive gasoline lead freeregular leaded or premium leaded having minimum octane number of 85 may be usedSee Table 1
WARNING
Gasoline is extremely flammable and highly explosive under certain conditions Do not fill fuel tank while motor is runningDo not smoke or allow open flames or sparks near boat when refueling Mix fuel in well ventilated area
Outboard OilUse Chrysler Outboard Oil which is BIA certified TC-W OilWhen Chrysler Outboard Oil is not available, the following may be used Next choice Any other BIA Certified TC -W OilHigh quality SAE-40 Heavy Duty
For emergency outboard oil
FuelOutboard Oil MixWhen buying pre-mixed fuel make sure 50 to ratio is usedTo mix fuel with outboard oil, proceed as follows: