2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 10Get this manual
IdentificationPropeller selectionPredelivery checks
Selection
When the engine speed is at the full throttle operating range (5,0006,000 rmin), the ideal propeller for the boat is one that provides maximum performance in relation to boat speed and fuel consumptionPropeller size (in) 12 58 2113 1913 2313 2513 14 1713 12 1513 58 1314 1113 1713 1913 2113 2313 2513 12 1413 12 16Stainless
S6D81020
Material
Aluminum
CAUTION:
This is 4-stroke engineNever use premixed fuel
Checking the engine oil level
1Check the engine oil level