Yamaha F4 - Checking Propeller

4-18
GB
EMU00388
CHECKING PROPELLER
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You could be seriously injured if the
engine accidentally starts while you are
near the propeller.
8 Before inspecting, removing or
installing the propeller, remove the
spark plug caps from the spark plugs.
Also, put the shift control in Neutral,
put the main switch in the “OFF” posi-
tion and remove the key, and remove
the lanyard from the engine stop
switch. Turn off the battery cut-off
switch if your boat has one.
8 Do not use your hand to hold the pro-
peller when loosening or tightening the
propeller nut. Put a wood block
between the cavitation plate and the
propeller to prevent the propeller from
turning.
EMU00390
Propeller Checking Point
8 Check each of the propeller blades for
wear, erosion from cavitation or ventila-
tion, or other damage.
8 Check the splines for wear and damage.
8 Check for fish line winding around the
propeller shaft.
8 Check the propeller shaft oil seal for
damage.
EMU00977
Removing the Propeller
1) Straighten the cotter-pin 1 and pull it
out using a pair of pliers.
2) Remove the propeller nut 2 and
washer 3.
3) Remove the propeller 4 and thrust
washer 5.
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