TOHATSU BFT115A Service Manual page 436

CYLINDER HEAD
CYLINDER COMPRESSION TEST
Set the remote control lever in the "N" (neutral) position.
Remove the emergency stop switch clip.
Remove the No. 1 spark plug (page 3-17).
Install a compression gauge (commercially available)
(1) in the No.1 plug hole.
Disconnect the throttle control cable (1) from the throttle
arm (2).
Set the throttle to the fully open position by pushing the
throttle arm against the stopper (3) as shown.
Set the combination switch in the START position and
turn the starter motor until the maximum reading is
obtained. Measure the cylinder compression.
CYLINDER COMPRESSION (Pressure check at 200
min -1 (rpm) with wide open throttle):
1,230 – 1,630 kPa (12.6 – 16.6 kgf/cm
Check the compression on all cylinders.
14-44
(2)
2 , 179 – 236 psi)
(1)
(2)
(1)
(3)