Yamaha YFM7FGPW Service Manual page 272

COOL
WATER PUMP
3. Measure:
• impeller shaft tilt
Out of specification → Replace.
CAUTION:
_
Make sure the rubber damper and rubber
damper holder are flush with the impeller.
Impeller shaft tilt limit
0.15 mm (0.006 in)
1 Straightedge
2 Impeller shaft
5 - 11