Test Run Procedure; Important Information - Mercury 40 Service Manual

Test Run Procedure

CAUTION
When engine is started, IMMEDIATELY check
that water pump is operating. Operation of water
pump is indicated by water discharging from "tell
tale".
1. While test running outboard, check powerhead
assembly for leaks and/or unusual noises. Make
any repairs before placing outboard in service.

Important Information

Proper break-in assures that all moving parts "wear-
in" evenly to ensure a longer engine life and optimum
performance.
Operate your new outboard motor at varied throttle
settings – not to exceed 1/2 throttle (2500-3500
RPM) during the first hour or the first five gallons of
break-in fuel. Refer to "Fuel Mixture and Gasoline/Oil
Recommendations" – "Break-In Fuel Mixture" lo-
cated in your operation and Maintenance Manual.
During the second hour operation, or the second 5
gallons (20 Liters) of break-in fuel, operate the Out-
board at varied throttle settings not to exceed 4500
RPM.
DO NOT OPERATE YOUR NEW OUTBOARD MO-
TOR AT FULL THROTTLE UNTIL THE SECOND
HOUR OF BREAK-IN IS COMPLETED.This in-
cludes full throttle acceleration, pulling water skiers,
or wide open throttle running.
After the first two hours of running, approximately 10
gallons (40 Liters) of fuel, full throttle operation may
be attained, but not sustained, for the remaining
break-in fuel (approximately 5 gallons).
For the next five hours of operation, full throttle oper-
ation may, again, be attained, but it is strongly not
recommended for sustained use. (Not more than 5
minutes of continuous wide open throttle.)
CAUTION
SEVERE DAMAGE to your engine can result by
not complying with the preceding break-in pro-
cedures.
90-852572R1 JANUARY 1998 POWERHEAD - 4-41