ANNUAL MAINTENANCE
19-1
Annually (Every 100 hours)
Annual Maintenance
Some boat owners choose to execute some maintenance proce-
dures on their boats. We have provided information on several proce-
dures. For safety reasons, a few must be performed by MasterCraft
service technicians only, such as anything involving checks and repairs
on the fuel line, which is under pressure.
Regardless of whether you choose to do some of the maintenance
work yourself or have it completed by a technician, these matters must
be addressed on a regular basis, at 100 hours or annually, whichever
comes first.
These procedures are in addition to seasonal preparation and winterization (see Winterization section for
additional details). All of these issues are extremely important to your continued boating pleasure, as well as long
life for your boat and the critical matter of safety.
Even if you plan to have annual maintenance work completed by your MasterCraft service technician, you still
should review this section and ensure that you have some understanding of what is necessary to keep your boat
in top condition.
MasterCraft recommends that your annual–or 100 hour–maintenance requirements be performed
by your MasterCraft dealer. The staff there has the proper equipment and technical training to
best meet your service needs.
Clean the engine flame arrestor
MasterCraft recommends that you have the flame arrestor inspected and cleaned by your dealer immediately prior to
starting the boating season. This procedure is extremely important and should be performed at least once a year.
There may be instances in which you need to check this yourself. If you have had evidence of material collecting inside
the flame arrestor in the past, you should check yours more often than annually, particularly after the boat has been sitting
for an extended period of time. The flame arrestor serves as a trap for airborne materials that might otherwise enter the
engine and cause damage. However, if your boat sits for a while, small creatures may crawl inside and build a nest.
Be very careful while removing and while the flame arrestor is off the engine that absolutely nothing foreign enters the
engine through the area normally covered by the flame arrestor. Any materials entering can cause damage to your engine
and will void your warranty.
Because this process should be completed while the engine is cool and cannot burn your skin, we recommend you do this
before starting your boat.
On TBI (Predator) Engines:
Step 1: Ensure the engine is OFF and the engine safety starting switch discon-
nected. Be certain that the throttle/shift control lever is in neutral. The engine
must be cool.
Step 2: Carefully remove the flame arrestor. On some engines it is located
directly on top of the engine and slides off. On others it is located on the side.
For these, you will need a screwdriver.
Step 3: Disconnect the PVC line.
Step 4: Inspect the inside of the flame arrestor for evidence of any foreign
materials and gently clean out any accumulated dust, dirt or foreign materials.
Step 5: Re-install the flame arrestor.
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