Mercury 225 EFI, Service Manual

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POWERHEAD
90-884294 OCTOBER 2001 Page 4A-87
Engine Break-in Procedure
IMPORTANT: Prior to initially starting engine, oil pump prime sequence must be acti-
vated using the Digital Diagnostic Terminal (DDT). Initiating the oil pump prime se-
quence will vacate any air in the oil output hose and mix oil with fuel in the vapor sepa-
rator thus preventing scoring of internal components during initial startup.
CAUTION
Severe damage to the engine can result by not complying with the Engine Break-In
Procedure.
Gasoline/Oil Break-In Mixture
MODELS WITH ELECTRONIC FUEL INJECTION (EFI)
Do not use pre-mixed gas and oil during break-in. Oil from the oil injection system will supply
adequate lubrication during engine break-in.
Break-In Procedure
FIRST HOUR
•
Avoid continuous operation at idle speed for more then ten minutes.
•
Run the engine the majority of time between 3000 and 4500 RPM approximately
three quarter throttle.
•
Vary engine speed; change engine speed approximately every 2 minutes.
•
Avoid trimming the outboard out (up) beyond a vertical trim position during operation.
•
Allow engine to warm-up for 30-60 seconds.
•
Short bursts of full throttle for periods up to 10 seconds are acceptable.
NEXT THREE HOURS
•
Change engine speed every 10 minutes.
NOTE : It is the driver’s responsibility to always drive in a safe manner. Improper trim angle
of the outboard when driving at speed can be difficult and dangerous. The purpose of speci-
fying trim angle is to help guide the operator in determining how to put the proper load on
the engine. They are intended to be guidelines and do not suggest or require unsafe boat
operation.