Crankcase Disassembly; Connecting Rod And Piston Removal; Crankcase Check - Yamaha Waverunner VXS VX1800 Service Manual

Crankcase disassembly

1. Place the crankcase upside down on a
bench.
2. Remove the crankcase "1".
TIP:
• Loosen the crankcase bolts in the opposite
order used for tightening.
• The numbers embossed on the crankcase
indicate the crankcase tightening order.
• Insert a flat-head screwdriver between the
reinforced portions "a" of the cylinder block
"2" and the crankcase "1" to separate them.
• Work carefully and make sure that the cylin-
der block and crankcase separate evenly.
a
3. Remove the crankshaft bearings "1" from
the crankcase.
TIP:
Write down the position of each crankshaft
bearing "1" so that it can be installed in its orig-
inal position.

Connecting rod and piston removal

1. Remove the connecting rod cap "1", and
then remove the connecting rod bearings
"2" and piston and connecting rod "3".
TIP:
For reference during installation, make identifi-
cation marks "a" on the connecting rod cap,
connecting rod, connecting rod bearings, and
piston crown.
1
a
2
2. Remove the piston pin clips "1", piston pin
1
3. Remove the piston rings.

Crankcase check

1. Check the oil passages. Blow out using
5-75
Crankcase, connecting rod, and piston
a
3
2
"2", and connecting rod "3".
2
1
compressed air if there are obstructions.
1
a
2
a
a
a
3
1