2001-2014 Honda BF/BFP8D, BF/BFP9.9D Outboards Shop Manual, Page 20Get this manual
BFBO-BFS.SC CYLINDER COMPRESSION CHECK
1) Shift the gear into the neutral position 2) Disengage the emergency stop switch clip from the emergency stop switch3) Remove the engine cover and both spark plugs 4) Install compression gauge in the No1 cylinder plug hole5) Disconnect the remote control throttle cable from the throttle arm (Remote control type only) 6) Manually hold the throttle arm or throttle lever in the full open position7) Electric starter typeTurn the starter motor using the starter switch (Tiller handle type) or ignition switch (Remote control type) until stable compression is obtained Do not operate the starter motor for more than seconds at one try If stable compression is not obtained within seconds, stop the starter motor and wait for 1020 seconds, and repeat the operation again