1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 15Get this manual
PROPELLER SELECTION and INSTALLATION PROPELLER SELECTION
ISelect propelle that will ll ow th molor to operate al near the lo of the recom mended full throttle RPM range (chartfollowing) with nor mal loadMax imum engine speed (RPM) fo propel ler selection ex ists when boat speed is maximum and trim is min imum for that speed(High RPMcaused by an excess ive trim angle, shou ld OI be used in determining correct propeller Normallythere is 300-10500 RPM change between propeller pit ches
3Align spli nes nd slide Quic ksi lver propeller ont propeller shaft
aForward Thrust HubPropeller Shalt
Full Throttle RPM Range
Figure 10Installing Thruat Hub and Propeller