9-26 LOWER UNIT
"
A
B
CHECKING DRIVESHAFT THRUST PLAY
After obtaining optimum tooth contact, the driveshaft thrust play
should be measured.
1. Affix the gear adjusting gauge to the driveshaft.
" 09951-09511: Gear adjusting gauge
2. Slowly push the driveshaft downward and read the maxi-
mum play. Designate this measurement as the play (A).
Driveshaft thrust play:
Approx. 0.4 – 0.6 mm (0.016 – 0.023 in)
NOTE:
The driveshaft thrust play (A) should be known to adjust the re-
verse gear shim.
RECHECKING DRIVESHAFT THRUST PLAY
(Reverse gear back-up shim adjustment)
1. After adjusting the forward gear tooth contact pattern, cor-
rectly assemble the propeller shaft, the housing assembly,
the reverse gear and the related components (See the page
9-17 to 9-19).
2. Install the sliding hammer A and the remover B onto the
propeller shaft and strike a few gentle outward taps.
" 09930-30161: Propeller shaft remover – B
09930-30104: Sliding hammer – A
3. Affix the gear adjusting gauge to the driveshaft.
" 09951-09511: Gear adjusting gauge
4. Slowly push the driveshaft downward and read the maxi-
mum play. Designate this measurement as the play (B).
5. Compare the play (B) to the play (A).
6. The reverse gear back-up shim adjustment is correct if the
play (B) is equal to the play (A).
If the play (B) is less than the play (A), reduce the reverse gear
back-up shim thickness.
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