31
CD625
Engine Break-In
INITIAL BREAK-IN PROCEDURE
It is especially important that the following procedure be used on new diesel engines. This break-in procedure
allows the proper seating of the pistons and rings, which greatly reduces the likelihood of problems.
IMPORTANT: It is recommended that the boat not be accelerated hard until this procedure has been
completed.
IMPORTANT: Never operate the starter motor longer than 15 seconds at a time, to avoid overheating the
starter motor. If engine does not start, wait 1 minute to allow the starter motor to cool; then, repeat start-
ing procedure.
1. Follow instructions “a” or “b”:
a. On D2.8L D-Tronic and D4.2L D-Tronic Engines: Proceed to Step 2.
b. On D3.6L, D4.2L and D4.2L LD Engines Only: After a lengthy layup (several months or more) pre-lu-
bricate the turbocharger and engine. To do this, hold the STOP switch toggle lever DOWN while you simulta-
neously turn the key switch to START position for 15 seconds. This will rotate the starter motor and engine/oil
pump. During this process the engine will not run because no fuel is injected. Allow the starter motor to cool
down for one minute and repeat the above described process. To avoid overheating the starter motor, do
not engage starter motor for more than 15 seconds each time. Proceed to step 2 after a slight increase in
oil pressure is observed.
2. Refer to appropriate “Starting, Shifting and Stopping” section and start engine. Allow engine to idle until it
has reached normal operating temperature.
3. Run engine in gear for 3 minutes at each of the following rpms: 1200 rpm, 2400 rpm and 3000 rpm.
4. Run engine in gear for 3 minutes at each of the following rpms: 1500 rpm, 2800 rpm and 3400 rpm.
5. Run engine in gear for 3 minutes at each of the following rpms: 1800 rpm, 3000 rpm and Maximum Rated
Full Throttle rpm.
CE11
20-HOUR BREAK-IN PERIOD
IMPORTANT: The first 20 hours of operation is the engine break-in period. Correct break-in is essential
to obtain minimum oil consumption and maximum engine performance. During this break-in period, the
following rules must be observed:
• DO NOT operate engine below 1500 RPM for extended periods during the first 10 hours. During this period,
shift into gear as soon as possible after starting engine and advance throttle so that RPM is above 1500 (pro-
vided that conditions permit safe operation at this speed).
• DO NOT operate at any one constant speed for extended periods.
• DO NOT exceed 75% of full throttle during the first 10 hours except during engine Initial Break-In Procedure.
During the next 10 hours, occasional operation at full throttle (5 minutes at a time maximum) is permissible.
• AVOID full throttle acceleration from stopped position.
• DO NOT operate at full throttle until engine reaches normal operating temperature.
• OBSERVE INSTRUMENTS, if an abnormal reading occurs, stop engine immediately and determine cause.
• FREQUENTLY CHECK crankcase oil and sterndrive unit fluid levels. Add if necessary. It is normal for oil con-
sumption to be somewhat high during the break-in period.
• AT END OF 20-HOUR break-in period, remove break-in oil and replace oil filter. Fill crankcase with correct
grade and viscosity oil.
To Next Page
Loading...
Need help?
General