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MODEL AQ, AQSHO SERIES 

 ASSEMBLY INSTRUCTIONS 

YAMAHA 200-250 HP, V6, 2 STROKE, 3.1 L 

200-250 HP, V6, 4 STROKE, 4.2 L 

 

 

2

 

10.  With the shift handle in forward and the reverse gate in forward, with the cam roller at the end of the slot, adjust 

the cable and/or cable anchor position to this condition. Shift to reverse and back to forward. The roller should 
be at the end of the cam slot such that the gate cannot be forcibly rotated toward reverse. Pull on the gate by 
hand to verify this. 

 
 

If this forward lock condition is not met, readjust the cable positions.  
 
 

11.  When converting to jet drive, your motor will have to be raised to the height shown in the diagram pg. 3, using 

a straight edge under the boat. Test run the boat and then raise or lower the motor 5/16 inch at a time to obtain 
best results. 
 
The motor has three sets of upper mounting holes. You will use one set to begin with. Mark pencil lines on the 
boat transom through the other sets. Then if you wish to go up or down 5/16 inch, you can drill one alternate set 
of holes 5/16 inch up or down from the pencil marks. By alternating between these two sets of transom holes 
and the three sets of motor holes, the motor can be moved in 5/16 inch increments over almost one inch. The 
transom height should e about 26 inches measured vertically from the boat bottom. 
 
If you raise it too much it will suck air and cavitate, either on start up or when banking on turns. When 
cavitating, the motor overspeeds in spurts and shakes considerably in the motor mount. This is not a normal 
condition and should be avoided by proper adjustment of motor height on each individual boat. If you lower it 
too much you will have excessive drag, therefore mount the motor as high as possible without allowing 
cavitation. 

 

SETTING MOTOR HEIGHT 

 

 

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 power head.  This is to check your assembly of the cooling 
water pump and its connections

Summary of Contents for 200-250 HP, V6, 2 STROKE, 3.1 L

Page 1: ...ne 3 8 16 x 1 1 2 bolt from above rear with lockwashers 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...

Page 2: ...nsom through the other sets Then if you wish to go up or down 5 16 inch you can drill one alternate set of holes 5 16 inch up or down from the pencil marks By alternating between these two sets of transom holes and the three sets of motor holes the motor can be moved in 5 16 inch increments over almost one inch The transom height should e about 26 inches measured vertically from the boat bottom If...

Page 3: ...strain on the driveshaft when the engine is suddenly brought back to normal speed as the impeller once again grabs solid water If your boat is used frequently under these conditions the engine height should be set lower than normal to minimize overspeeding Running at reduced throttle will help when winds are strong You can also experiment with a plate extending from the hull bottom to the top of t...

Page 4: ...MODEL AQ AQSHO ANODE KIT 1693 ...

Page 5: ...5 NYLOC 5 16 18 23 1 552 GREASE 10 OZ TUBE NO 630 AA 171 1 BRACKET ASSY AQ AW W CLAMP HARDWARE 24 1 1172 01 REVERSE GATE LARGE 70 1 156 1 BRACKET CABLE SUPPORT AQ AW 25 2 536 NYLINER 1 2 ID X 13 16 71 1 542 SHIM MORSE A035777 26 1 1178 SPRING GATE PIVOT 1 2 72 1 543 CLAMP CHRYS 154317 27 2 823 PIN GATE PIVOT 1 2 LARGE 73 2 561 FL HD SLOTTED 10 24 X 5 8 28 1 1043 SHAFT ROLLER 74 8 640 WASHER SPRING...

Page 6: ...ght to remove any play between the impeller and shaft Note the position of the impeller shim washers and replace them in the same order REVERSE GATE MECHANISM Occasionally check adjustment of the gate shifting linkage In forward the gate should be firmly locked in position Pull on the gate by hand to verify this This will prevent wave action from accidentally shifting the gate into reverse as the ...

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