Yamaha F25 User Manual download pdf (Page 46)

Maintenance

Checkpoints

● Check each of the propeller blades for

wear, erosion from cavitation or ventilation,

or other damage.

● Check the propeller shaft for damage.

● Check the splines / shear pin for wear or

damage.

● Check for fish line tangled around the pro-

peller shaft.

● Check the propeller shaft oil seal for dam-

age.

NOTE:

If the shear pin equipped: it is designed to

break if the propeller hits a hard underwater

obstacle to help protect the propeller and

drive mechanism. The propeller will then spin

freely on the shaft. If this happens, the shear

pin must be replaced.

EMU30660

Removing the propeller

EMU29194

Spline models

1. Straighten the cotter pin and pull it out us-

ing a pair of pliers.

2. Remove the propeller nut, washer, and

spacer (if equipped).

3. Remove the propeller and thrust washer.

EMU30670

Installing the Propeller

EMU30371

Spline models

CAUTION:

ECM00340

● Be sure to install the thrust washer be-

fore installing the propeller, otherwise

the lower case and propeller boss could

be damaged.

● Be sure to use a new cotter pin and bend

the ends over securely. Otherwise the

propeller could come off during opera-

tion and be lost.

1. Apply Yamaha marine grease or a corro-

sion resistant grease to the propeller

shaft.

1. Cotter pin

2. Propeller nut

3. Washer

4. Propeller

5. Thrust washer

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Yamaha F25 User Manual Page 46

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