COMPROP
Yamaha 40-50hp
typical installation
 

prop shaft
Prop shaft
 
 

 

  

 
 
 
Yamaha
thrust washer
663-45987-02-00
Thrust washer








 
Yamaha prop
 
 
 

Rear spacer

splined
rear
spacer
670-45997-02
 

Yamaha
washer

92990-16200
Washer
 
 

 
 
 

cotter
pin
Cotter pin
Prop nut
castle
prop nut
90171-16011

 

Yamaha 40-50hp
installation using
COMPROP M4323
Two thrustwasher choices
• Yamaha (preferred)
• Mercury 73345A1 (this
   moves prop aft .200")
 
 
 
prop shaft
Prop shaft
 
 
 
 
 
 
 
 
Yamaha
thrust
washer
Yamaha thrust washer
Mercury thrust washer
Mercury (50hp)
thrust washer
73345A1
M4323
 

Yamaha
washer

Washer
Tab washer
Mercury
tab washer
14-76281
cotter
pin
Cotter pin
castle
prop nut
Prop nut
 
Eliminate Yamaha splined rear spacer.
Two choices aft of the prop:
• Use Yamaha washer , castle nut &
   cotter pin.  (Twist off locking nubs
   on M4323 prop hub with pliers.)
• (Preferred) Use a Mercury tab
   washer with the locking nubs on
   the M4323 & castle nut .  This
   eliminates the cotter pin which can
   be a hassel.
 

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