TOHATSU BFT250A Service Manual page 431

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Stagger the piston ring end gaps as shown (top ring [1],
second ring [2], side rail (top side) [3], spacer [4], and
side rail (skirt side) [5]).
• Do not align with the piston pin, and avoid the
direction that makes a right angle with the piston pin.
CRANKCASE COVER/CRANKSHAFT
ASSEMBLY
Apply engine oil to the threads and seating surface of
the oil jet bolt [1].
Install the three oil jet bodies [2] onto the cylinder block
by aligning the tab [3] of the oil jet body with the hole [4]
of the cylinder block.
Install and tighten the three oil jet bolts to the specified
torque.
TORQUE: 16 N·m (1.6 kgf·m, 12 lbf·ft)
CYLINDER BLOCK
[1]
[2]
[3]
[4]
[5]
APPROX. 10°
SIDE RAIL END APPROX. 15°
GAP (TOP SIDE)
(FIXED POSITION)
APPROX.
120°
TOP RING
PISTON
END GAP
PIN
[3]
[4]
SPACER
RING
END GAP
SIDE RAIL
END GAP
(SKIRT SIDE)
APPROX. 120°
SECOND RING
END GAP
[1]
[2]
15-17