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  #1  
Old 05-21-2016, 12:45 AM
jjsaustin jjsaustin is offline
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Is it really possible to break in your engine....

According to the manual, it states for the first 50 hours vary your speed every 3 minutes. Hour can you ski, wakeboard, or even surf?

Is this even possible to properly break in the engine?
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Old 05-21-2016, 02:02 AM
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gt23 gt23 is offline
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Jj. Which engine is that for? I was told don't hold any constant speed for long for the first ten hours. Which page is this info you posted on?


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Old 05-21-2016, 02:05 AM
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scott023 scott023 is offline
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Quote:
Originally Posted by jjsaustin View Post
According to the manual, it states for the first 50 hours vary your speed every 3 minutes. Hour can you ski, wakeboard, or even surf?

Is this even possible to properly break in the engine?
If you're using PP your rpm will fluctuate constantly, which I think is key. Speed may be relativity consistent, but the rpm changes should ensure a proper break in.
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Old 05-21-2016, 02:15 AM
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gt23 gt23 is offline
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This is from Illmor manual

First Hours of Operation
1. DANGER!
Always open the engine compartment and check for
fumes, leaks or the presence of fluids in the bilge and operate the
bilge blower for at least 4 minutes before starting the engine, and
always when at idle or slow-running speed. Start the engine and allow
it to warm up to the normal operating temperature range of 140F
(60C) to 190F (87C), depending on model. See Engine Specifications
on page 11-1 for specific operating temperatures of each engine model.
This should be done in the idle (600 to 800 rpm as measured on the
tachometer) mode.
2. Move the throttle/shift control lever forward, smoothly and quickly, to
planing speed. Then return the throttle back to a slower speed, but one
that continues the plane. Vary the engine speed but do not exceed 3,000
rpm for the first hour, and carry only a light load. After the first hour,
the rpm may not exceed 5,200 rpm for the 5.7L, 5,400 rpm for the 6.0L
and 6.2L, or 5,800 rpm for the 7.4L engines. Reduce the throttle/shift
control lever to idle (neutral) occasionally for a cool-down period.
6/2014 Ilmor Marine Engines, Version 1.0 6-3
STARTING, STOPPING AND NEW ENGINE BREAK-IN
3. The boat MUST be returned to the certified Ilmor dealer for a
mandatory oil change between 10 and 25 hours of operation. This
ensures the service staff will be able to determine whether any internal
issues may be apparent.

Then:

After Initial Hours of Operation
1. After the break-in and oil change have been completed, the engine
may be operated more continuously at speed, but never beyond the
maximum, and it is always advisable to give the engine an occasional
cool-down period. For the 5.7L engine, the maximum is 5,200 rpm;
for the 6.0L, the maximum is 5,400 rpm; for the 6.2L, the maximum is
5,600 rpm; and for the 7.4L, the maximum is 5,800 rpm.
2. Throughout the life of the engine, always allow it a warm-up period
before operation. Abuse of the engine and transmission are never
covered under warranty. Regular maintenance as outlined in this
Owners Manual is very important to ensuring a long, trouble-free
engine life.
3. Subsequent oil changes should be done every 50 hours or quarterly if
the boat is not used regularly. See Section 7, Maintenance, for more
details.
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  #5  
Old 05-21-2016, 02:21 AM
Shaun R's Avatar
Shaun R Shaun R is offline
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Keep the revs down under 2k for the first hour. For the next 8-9 hours still go easy on it limiting full throttle acceleration and red line rpm. Work in some easy acceleration where you spin the motor up under load and then let the rpms come back down. First 10 hours you are just trying to properly set the rings to prevent oil consumption. After that, hammer down

No synthetic oils until after the 10hr mark.
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Old 05-21-2016, 02:22 AM
gt23's Avatar
gt23 gt23 is offline
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Quote:
Originally Posted by gt23 View Post
This is from Illmor manual

First Hours of Operation
1. DANGER!
Always open the engine compartment and check for
fumes, leaks or the presence of fluids in the bilge and operate the
bilge blower for at least 4 minutes before starting the engine, and
always when at idle or slow-running speed. Start the engine and allow
it to warm up to the normal operating temperature range of 140F
(60C) to 190F (87C), depending on model. See Engine Specifications
on page 11-1 for specific operating temperatures of each engine model.
This should be done in the idle (600 to 800 rpm as measured on the
tachometer) mode.
2. Move the throttle/shift control lever forward, smoothly and quickly, to
planing speed. Then return the throttle back to a slower speed, but one
that continues the plane. Vary the engine speed but do not exceed 3,000
rpm for the first hour, and carry only a light load. After the first hour,
the rpm may not exceed 5,200 rpm for the 5.7L, 5,400 rpm for the 6.0L
and 6.2L, or 5,800 rpm for the 7.4L engines. Reduce the throttle/shift
control lever to idle (neutral) occasionally for a cool-down period.
6/2014 Ilmor Marine Engines, Version 1.0 6-3
STARTING, STOPPING AND NEW ENGINE BREAK-IN
3. The boat MUST be returned to the certified Ilmor dealer for a
mandatory oil change between 10 and 25 hours of operation. This
ensures the service staff will be able to determine whether any internal
issues may be apparent.

Then:

After Initial Hours of Operation
1. After the break-in and oil change have been completed, the engine
may be operated more continuously at speed, but never beyond the
maximum, and it is always advisable to give the engine an occasional
cool-down period. For the 5.7L engine, the maximum is 5,200 rpm;
for the 6.0L, the maximum is 5,400 rpm; for the 6.2L, the maximum is
5,600 rpm; and for the 7.4L, the maximum is 5,800 rpm.
2. Throughout the life of the engine, always allow it a warm-up period
before operation. Abuse of the engine and transmission are never
covered under warranty. Regular maintenance as outlined in this
Owners Manual is very important to ensuring a long, trouble-free
engine life.
3. Subsequent oil changes should be done every 50 hours or quarterly if
the boat is not used regularly. See Section 7, Maintenance, for more
details.
JJ I think you may have misunderstood what the MC manual was saying. "but the break-in must continue for the first fifty (50) hours of your ownership." When you read the Illmor manual it is very clear, and MC just refers to the Illmor manual:

"The first hours of operation affect the engine and drive train more than
any other component on the boat. Therefore, it is very important to follow
EXACTLY the break-in procedure as outlined in the engine owners manual. Engine manufacturers have detailed and specific requirements for proper
engine break-in. That information is found in the engine manual supplied,
and must be followed exactly as indicated.
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  #7  
Old 05-21-2016, 02:25 AM
gt23's Avatar
gt23 gt23 is offline
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Quote:
Originally Posted by Shaun R View Post
Keep the revs down under 2k for the first hour. For the next 8-9 hours still go easy on it limiting full throttle acceleration and red line rpm. Work in some easy acceleration where you spin the motor up under load and then let the rpms come back down. First 10 hours you are just trying to properly set the rings to prevent oil consumption. After that, hammer down

No synthetic oils until after the 10hr mark.
In an 5.7L Illmor MV8 the engine owners manual state Pennzoil Platinum 5W-30 full synthetic 5 qt (4.7 L); that is what is standard to use... would they use something else for the break in period, which is why they are so strongly demanding you must change between 10-25 - would that make sense Shaun.
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  #8  
Old 05-21-2016, 02:34 AM
Shaun R's Avatar
Shaun R Shaun R is offline
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GM ships all their motors with synblend now, that's probably what they use as well. Rings do not seat as well on the full synthetic stuff and that's the important part. Clutches in the trans also part of the breakin period. I only made it ten hours on my motor before the fun began, good luck hitting fifty.
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  #9  
Old 05-21-2016, 10:36 AM
jjsaustin jjsaustin is offline
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Note the last sentence of the first paragraph from page 5-7 in the 2015 Mastercraft Owners Manual:
New Boat Break-in

The first 50 hours of operation are the most important for establishing acceptable wear parameters for the boat. Proper break-in will ensure maximum performance and the longest possible powertrain life. The break-in period allows moving parts within the engine and transmission to wear in properly. All Mastercraft boats are lake tested on the water before leaving the factory but the break-in period must continue for the first 50 hours of your ownership.

I think it is clear from above that the break in period is 50 hours.

Then, one of the bullets on that page states:
Vary the engine speed. Never run the engine for more than three minutes at any constant rpm during the break in. Follow the specific instruction will assist in the proper breaking of rings and bearings

Last edited by jjsaustin; 05-21-2016 at 10:57 AM.
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  #10  
Old 05-21-2016, 10:50 AM
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MattsCraft MattsCraft is offline
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Or you could do it the way they break in Formula 1 engines - lol

https://www.youtube.com/watch?v=26X_s28ilYs
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