Chaparral 2009 Signature 250, Руководство владельца/оператора

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Alignment
Aligning the engine with the propeller shaft is critical for smooth
operation of your boat. The shafts are properly aligned at the fac-
tory. Check the alignment after delivery or an extended lay–up. A
slight misalignment can result in a loss of power, vibration, or wear
in the bearings.
To check the alignment:
1. Remove the coupling bolts and spread the couplings very
slightly.
2. Use a feeler gauge to measure the gap between drive shaft and
propeller shaft at the coupling. The difference in reading should
not exceed 0.003 inch around the coupling edges.
3. A second check is to leave the flange on the engine fixed and
rotate the propeller shaft coupling in 90° steps. Check the clear-
ance between the fixed engine flange and the rotating propeller
flange with the feeler gauge at the top. If the four measurements
differ by more than 0.003 inch, it may be an indication that there
is a slight bend in the propeller shaft. This is an important check
after striking a submerged object.
4. The straightness of the shaft can be further checked with the
boat out of the water by setting up a dial indicator on a solid
fixed surface and rotating the propeller shaft by hand. This test
will clearly indicate whether the propeller shaft has been bent.
Shaft alignment may change slightly after your boat is in use. Your
dealer should check alignment occasionally, particularly if there is
vibration, a drumming sound, or loss of RPMs.
Rudders
Your boat has dual rudders. The rudder shaft stuffing box provides an
opening for the rudder shaft through the bottom of the boat. The stuff-
ing box keeps water from leaking around the shaft into the boat. The
rudder stuffing boxes are similar to those used for propeller shafts.
Important: Overtightening the packing retainer to stop stuffing
box leakage may score the rudder shaft.
Seacocks and Sea Strainers
Your boat may be equipped with seacocks to close through hull
openings below the water line. Close seacocks when your boat will
be unattended for extended periods of time.
Inspect and clean sea strainers regularly. The frequency of cleaning
will vary depending on the amount of use and local conditions. To
clean the strainer, close the seacock and unscrew the wing nuts on
top of the strainer housing. (Figure 3.6) Remove screen and wash.
After replacing the screen, replace and tighten the wing nuts. Open
the seacock and check for leaks.
OPTIONAL SYSTEMS
QL Neutra-Salt Flush Kit
The corrosive effects of salt, inside and outside engines, are a chal-
lenge to saltwater boaters – particularly if the boat is kept in the
water. With the QL Neutra-Salt Engine Flushing System, boaters
3-13
STRAINER
SCREEN
COVER
WINGNUT
Figure 3.6 Sea Strainer