Assembling Power Unit Parts - TOHATSU MX 50D2 Service Manual

Power Unit
7 7
LIT
LIT
2
3
5-74
a a
1 2st
2st OIL
1
2 2
3) Fit piston pin clip 7 as shown.
Take care not to scratch to piston wall,
when fit piston pin clip.
Set the piston pin clip so that the gap of the clip is
at the opposite side of the opening a located in
the piston pin clip groove.

21) Assembling Power Unit Parts

Install main bearing (upper) 1 to crank shaft ass'y.
1.
· Face the marking on the bearing to flywheel
side.
· Apply LIT grease to the oil seal lip.
· Use new O ring.
2st OIL
2st
LIT
LIT
2. Install crank shaft ass'y to cylinder.
Apply genuine engine oil to the following parts before
assembling them.
· Big End of Connecting Rod
· Small End of Connecting Rod
· Main Bearing and ball bearing
· Piston Ring and Entire Circumference of Piston, and
Entire Cylinder Wall
· O Ring of Upper Bearing
When the piston skirt enters into cylinder
liner, thrust plate 2 is inserted in groove,
and then crank shaft is lowered slowly.
· When installing crank shaft ass'y, lower the ass'y
gradually so that crank shaft is held parallel with
the cylinder face.
· Insert pistons one by one while confirming that
each piston enters vertically in the cylinder liner.
Pistons can be inserted easier while moving
them up and down a little.
· Put a piece of round bar or pipe 3 of ø13.5 mm
(0.532 in) in the drive shaft opening to make it
easier to hold.
2st OIL
2st
CAUTION
CAUTION
2st X50D2 2011
GB