Yamaha F50 Service Manual
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62Y3A116-22 1 2 3 4 5 6 7 8 I No. Part name Q’ty RemarksTightening torques Stage N·mkgf·mft·lb 1 Shift rod assembly 1 2 Drive shaft 1 3 Oil seal 1 Not reusable 4 Oil seal housing 1 5 O-ring 1 Not reusable 6 Circlip 1 7 Shift rod 1 8 O-ring 1 Not reusable 9 Taper roller bearing 1Not reusable 10 Bearing outer race 1Not reusable 11 Pinion shim—As required 12 Sleeve 1 13 Oil seal housing assembly 1 14 Washer 1 15 Oil seal housing 1 16 O-ring 1 Not reusable 17 Oil seal 2Not reusable 18 Seal 1 19 Plate 1 20 Hose 1 21 Plastic tie 1 Not reusable 22 Joint 1 23 Nut 1 24 Water inlet cover 2 25 Screw 1 5 0.5 3.6 26 Shift cam 1 27 Needle bearing 1 28 Pinion 1 29 Nut 1 : 17 mm 75 7.5 54 30 Forward gear shim—As required 31 Bearing outer race 1 Not reusable 32 Taper roller bearing 1Not reusable 33 Forward gear 1 34 Lower case 1 Drive shaft and lower case (F50/F50A)
LOWRLower unit 6-2362Y3A11 Removing the drive shaft 1. Remove the drive shaft assembly and pinion, and then pull out the forward gear. ÈFor USA and Canada ÉFor worldwide Disassembling the drive shaft assembly 1. Install the pinion nut 1 , tighten it finger tight, and then remove the drive shaft bearing 2 using a press. ÈFor USA and Canada ÉFor worldwide CAUTION: •Do not press the drive shaft threads a directly. •Do not reuse the bearing, always replace it with a new one. Disassembling the forward gear 1. Remove the taper roller bearing from the forward gear using a press. CAUTION: Do not reuse the bearing, always replace it with a new one. Drive shaft holder 1 : YB-06049 Drive shaft holder 4 2 : 90890-06518 Pinion nut holder 3 : 90890-06505 Socket adapter 1 4 : 90890-06506 S62Y6850R 2 4 3É Bearing splitter plate 3 : YB-06219 Bearing inner race attachment 4 : 90890-06641 Bearing splitter plate 1 : YB-06219 Bearing separator 1 : 90890-06534 S62Y6740K 1
62Y3A116-24 1 2 3 4 5 6 7 8 I Disassembling the lower case 1. Remove the taper roller bearing outer race and shim(s). ÈFor USA and Canada ÉFor worldwide NOTE: Install the claw as shown. 2. Remove the drive shaft bearing outer race, shim(s), and drive shaft sleeve. ÈFor USA and Canada ÉFor worldwide NOTE: Install the claw as shown. 3. Remove the needle bearing. 4. Remove the shift rod assembly and shift cam. Slide hammer and adapters 1 : YB-06096 Bearing outer race puller 2 : 90890-06523 Outer race puller claw A 3 : 90890-06532 Stopper guide stand 4 : 90890-06538 Slide hammer and adapters 5 : YB-06096 Stopper guide plate 6 : 90890-06501 Stopper guide stand 7 : 90890-06538 Bearing puller 8 : 90890-06535 Bearing puller claw 1 9 : 90890-06536 Drive shaft needle bearing remover and installer 0 : YB-06063 Needle bearing attachment 0 : 90890-06614 Driver handle A : YB-06071 Driver rod L3 A : 90890-06652 S62Y6250 8 79 6 Drive shaft and lower case (F50/F50A)
LOWRLower unit 6-2562Y3A11 Checking the pinion and forward gear 1. Check the teeth of the pinion, and the teeth and dogs of the forward gear for cracks or wear. Replace the pinion or gear if necessary. Checking the bearings 1. Check the bearings for pitting or rum- bling. Replace if necessary. Checking the drive shaft 1. Check the drive shaft for bends or wear. Replace if necessary. Checking the shift rod and shift cam 1. Check the shift rod and shift cam for cracks or wear. Replace if necessary. Checking the lower case 1. Check the skeg and torpedo for cracks or damage. Replace if necessary. Assembling the lower case 1. Install the shift rod assembly 1 and shift cam 2 as shown. NOTE: Install the shift cam with the “UP” mark a facing upward. S62Y6260 S62Y6265
62Y3A116-26 1 2 3 4 5 6 7 8 I 2. Install the needle bearing into the lower case to the specified depth. ÈFor USA and Canada ÉFor worldwide NOTE: Install the needle bearing with the manufac- ture identification mark b facing upward. When using the driver rod, do not strike the special tool in a manner that will force the stopper c out of place. 3. Install the sleeve, original shim(s), and bearing outer race. CAUTION: Add or remove shims, if necessary, when replacing the pinion or lower case. NOTE: Apply gear oil to the inside and outside of the sleeve. Install the sleeve with the projection f fac- ing forward. Driver handle 3 : YB-06071 Drive shaft needle bearing remover and installer 4 : YB-06063 Drive shaft needle bearing depth stop 5 : YB-34474 Driver rod SL 6 : 90890-06602 Needle bearing attachment 7 : 90890-06614 Bearing depth plate 8 : 90890-06603 Depth d : 132.5–133.0 mm (5.22–5.24 in) Depth e : 182.5–183.0 mm (7.19–7.21 in) É Drive shaft taper roller bearing cup installer 9 : YB-06110 Bearing outer race attachment 9 : 90890-06627 Driver handle 0 : YB-06071 Driver rod LS 0 : 90890-06606 Drive shaft and lower case (F50/F50A)
LOWRLower unit 6-2762Y3A11 4. Install the forward gear original shim(s) and taper roller bearing outer race. CAUTION: Add or remove shims, if necessary, when replacing the forward gear or lower case. Assembling the forward gear 1. Install the new taper roller bearing into the forward gear using a press. ÈFor USA and Canada ÉFor worldwide Assembling the drive shaft 1. Install the new drive shaft bearing into the drive shaft using a press. ÈFor USA and Canada ÉFor worldwide NOTE: Use a special service tool or a general pipe with the specified measurements. Forward gear bearing cup installer A : YB-06109 Bearing outer race attachment A : 90890-06622 Driver handle B : YB-06071 Driver rod LL B : 90890-06605 Drive shaft taper roller bearing cup installer 1 : YB-06110 Bearing inner race attachment 2 : 90890-06639 General pipe 1 : D = 38 mm (1.49 in), d = 32 mm (1.26 in) Bearing inner race attachment 2 : 90890-06644
62Y3A116-28 1 2 3 4 5 6 7 8 I 2. Install the new oil seals to the oil seal housing as shown. ÈFor USA and Canada ÉFor worldwide Installing the drive shaft 1. Install the forward gear, then the drive shaft assembly, pinion, and pinion nut, and then tighten the nut to the specified torque. ÈFor USA and Canada ÉFor worldwide Installing the lower unit 1. Set the gearshift to the neutral position at power unit and lower unit. Oil seal installer 3 : YB-06168 Driver handle 4 : YB-06071 Needle bearing attachment 5 : 90890-06653 Driver rod L3 6 : 90890-06652 Drive shaft holder 1 : YB-06049 Drive shaft holder 4 2 : 90890-06518 Pinion nut holder 3 : 90890-06505 Socket adapter 1 4 : 90890-06506 Pinion nut: 75 N·m (7.5 kgf·m, 54 ft·lb) S62Y6850R 2 4 3É S62Y6035 N Drive shaft and lower case (F50/F50A)
LOWRLower unit 6-2962Y3A11 2. Install the two dowel pins 1 to the lower unit. 3. Install the lower unit to the upper case, and then tighten the bolts to the specified torque. 4. Install the trim tab 2 to its original posi- tion, and then connect the speedometer hose 3 .5. Install the propeller and propeller nut, tighten the nut finger tight. Place a block of wood between the anti-cavitation plate and propeller to keep the propeller from turning, and then tighten the nut to the specified torque. Mounting bolt: 40 N·m (4.0 kgf·m, 29 ft·lb)
62Y3A116-30 1 2 3 4 5 6 7 8 I WARNING Do not hold the propeller with your hands when loosening or tightening it. Be sure to remove the battery leads from the bat- teries and the engine shut-off switch. Put a block of wood between the cavitation plate and propeller to keep the propeller from turning. NOTE: If the grooves in the propeller nut 4 do not align with the cotter pin hole, tighten the nut until they are aligned. Propeller nut 4 : 35 N·m (3.5 kgf·m, 25 ft·lb) Drive shaft and lower case (F50/F50A)
LOWRLower unit 6-3162Y3A11 Shimming (F50) (for USA and Canada)6