Manual Mastercraft X46 (page 184 of 285) (English)

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engine immediately if the gauges and/or

video screen(s) indicate a problem. Low

oil pressure and overheating are serious

issues and require immediate attention.

• Abnormal vibration or noises. These

symptoms can be the rst signs of

trouble and should not be ignored. Oc-

casionally, hardware may work loose,

mountings may need to be tightened or

the driveline may require attention.

• Fuel, oil or water leaks. Leaks can pose

a serious safety threat. If one occurs, it is

quite likely to do so after a few hours of

operation.

• Vary the engine speed. Never run the

engine for more than three (3) minutes

at any constant RPM during the break-in

period. Following this specic instruc-

tion will assist in the proper break-in of

rings and bearings.

• Plane the boat quickly. Operating the

boat at low speeds places an excessive

load on the engine. Plane quickly, then

back down to a slower speed.

First Hours of Operation

The rst hours of operation affect the

engine and drive train more than any oth-

er component on the boat. Therefore, it is

very important to follow EXACTLY the

break-in procedure as outlined in the en-

gine owner’s manual.

Engine manufacturers have detailed and

specic requirements for proper engine

break-in. That information is found in the

engine manual supplied, and must be fol-

lowed exactly as indicated. Failure to do so

could cause engine damage and/or failure

that is not covered under warranty.

After Break-In

Once the break-in period is over, the

boat may be operated continuously at any

speed, but not beyond the maximum indi-

cated in the engine owner’s manual.

The engines are equipped with rev-

limiters which will cause a uttering sound

when reached. If the boat has the correct

propeller set-up, operators should never

reach the limiter, but if that happens, it is

a signal that you should reduce the throttle

and check with an authorized MasterCraft

dealer to determine the cause.

Always remember that during normal

operation you should allow the engine to

warm up gradually. Be sure the engine is

warm before accelerating. Pay careful at-

tention to the gauges and video screen(s).

Also, check the oil level frequently during

the rst fty (50) hours of operation since

the piston rings and cylinders require that

much time to seat properly.

See the Scheduled Maintenance Checks

and Services section for more details.

Failure to follow the engine oil recommen-

dations listed in the engine owner’s manual

can cause additional engine wear and in-

crease the possibility of engine component

failure. Damage to the engine due to incor-

rect oil usage can be costly to repair, and it

is not covered by the warranty!

Preparation • 2014 MasterCraft Owners Manual Page 5-9

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Mastercraft X46 Manual

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