249
MIDSECTION
EXHAUST HOUSING, 75 – 90 HP
11
Cleaning and Inspection
Clean all parts with parts cleaning solvent and dry
with compressed air . All nu t and screw thread s
coated with thread locking material must be thor-
oughly cleaned before a ssembly. When u sing a
thread lo cking pr oduct, be sure to p rime the
threads with Locquic Primer.
Examine the upper and lower thrust mounts, and
replace if deteriorated or damaged.
Before checking the exhau st housing for distor-
tion, thoroughly clean the top and bottom mating
surfaces and remove all sealer and corrosion.
Check the exha ust hou sing for distortion. Place
the housing on a surface plate. Use a dial indica-
tor to check flatness by measuring the run-out on
the top edge of housing. The maximum allowable
run-out is 0.009 in. (0.228 mm). If you do not have
access to a dial indicator and surface plate, seek
the services of a machine shop. DO NOT attempt
to straighten a distorted housing; replace it.
IMPORTANT: A d istorted e xhaust h ousing will
cause the upper driveshaft splines to wear exces-
sively and will damage the crankshaft splines.
Inspect the water tube for obst ructions or kinks,
which may restrict water flow.
Exhaust Housing Assembly
Place a new gasket between the exha ust meg a-
phone and adapt er housing . Apply Ultra Lock to
the threads of the screws and tighten to a torque
of 60 to 84 in. lbs. (7 to 9.5 N·m).
Place a new grommet on the water tube and coat
the outside edge with Adhesive 847.
A WARNING
Wear safety glasses to avoid personal
injury, and set compressed air to less than
25 psi (172 kPa).
DR2223
1. Adapter to megaphone screws
2. Exhaust megaphone
001976
1. Water tube grommet
2. Flared end of water tube
001977
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