Yamaha 150S- User Manual
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Table of Contents:
- Page 2 – with the cam roller at the
- Page 3 – CAUTION
- Page 6 – MODEL AW YAMAHA 150HP; SIZE; RING KIT
MODEL AW YAMAHA SERIES 150 HP
ASSEMBLY INSTRUCTIONS
IN-LINE 4 CYLINDER, 4 STROKE 163 CU. IN.
1
1. Place the engine on the transom of your boat so that it is mounted vertically, in the normal
fashion. Remove the bolts holding the gearbox to the exhaust housing and remove the gearbox
assembly.
2. Remove the water pump assembly from the propeller drive, including the lower stainless steel
plate, dowel pins, and impeller drive key.
3. Install the jet driveshaft assembly into the spiral pump housing locking it in place with the four
5/16-18 x 1 bolts with lock washers. Use grease on the threads. Tighten to 15 Ft-Lbs.
4. Install the water pump assembly on top of the 3/4
”
thick aluminum adapter and stainless steel
plate. Be sure also, to install the water pump impeller drive key removed from the propeller
drive. Lock in place using four 5/16 -18 x 2 1/2 bolts and lock washers. Grease the threads.
Tighten to 10 Ft -Lbs.
The tapered thrust ring assembly above the water pump on the
propeller drive is not used on the jet drive.
5. The large 3/4
”
adapter plate is attached to the exhaust housin g to hold the jet drive. A 1/4 x
2
”
plastic shift rod guide in the front of the plate guides the disconnected shift rod. Two 8 x
12MM dowels locate the plate, seven M10 x 34MM bolts with lock washers secure it. Grease
the bolt threads and the end of the pin where it slides in the shift rod. Tighten to 22 Ft-Lbs.
6. Next, attach the jet drive to the motor. Two 3/16 x 1/2 dowel pins center the jet drive on the
adapter plate. Four 3/8-16 bolts from below and one 3/8-16 x 1-1/2 bolt from above rear with
lock washers are used. Select the lower bolt lengths to suit the different counter bore depths so
that all bolts enter the adapter plate the same depth. The upper rear bolt is reached through the
trim tab opening in the motor exhaust housing.
Grease the bolt threads, driveshaft spline generously, and rubber water tube pilot and guide
the jet into place. Tighten to 22 Ft-Lbs.
7. Next, install the impeller. Grease the shaft threads, key and impeller bore. Place the plastic
sleeve inside the impeller, hold the key in the nose of the impeller with your forefinger and slide
onto the driveshaft. Install the seven shim washers, rubber washer and cup, and nut retainer on
the shaft, up against the impeller, and bring the nut up snug by hand.
Then bump the nut up snug with a wrench. If the ears of the retainer do not line up with the
flats on the nut, spin the nut off, turn the retainer over and tighten the nut again. In one of
these two positions you will have alignment and can fold the ear
s up against the nut to retain it.
The flat in the retainer is angled to the ears to allow this.
When, after use in sand and gravel, the blade clearance becomes more than about 1/32
”
between the impeller edge and the water intake liner, one or more of the shim washers can be
transferred from the bottom stack to the top of the impeller, which moves the impeller down
into the tapered casing to reduce the clearance.
Shims should not be used above the impeller on new installations where no wear has
occurred unless the blade clearance exceeds 1/32 inch. Insufficient blade clearance will do
more harm than good from any performance gains it might provide.
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Summary
MODEL AW YAMAHA SERIES 150 HP ASSEMBLY INSTRUCTIONS IN-LINE 4 CYLINDER, 4 STROKE 163 CU. IN. 2 8. Place the intake casing in position with the lower end at the rear and tighten the six nuts. No lock washers are used. Grease the threads. 9. Attach the shift cable to the cable anchor bracket. Set the ...
MODEL AW YAMAHA SERIES 150 HP ASSEMBLY INSTRUCTIONS IN-LINE 4 CYLINDER, 4 STROKE 163 CU. IN. 3 CAUTION When starting the engine for the first time, watch to see that the cooling water comes out of the small hole at the rear side of the engine just below the powerhead. This is to check your assembly ...
MODEL AW YAMAHA 150HP IN-LINE 4 CYL. 4 STROKE 163 CU. IN. REF QTY PART DESCRIPTION REF QTY PART DESCRIPTION NO. NO. 1 1 938 PUMP ADAPTER AA 51 4 517 SPIROLOX RR-150S 2 4 603 BOLT HEX HD 5/16-18 X 2 1/2 52 2 506 SEAL INNER 3 1 1611 ADAPTER PLATE AQ, AW 53 2 507 SEAL OUTER 6324-S 4 1 943 SHIFT ROD GUI...
