Figure 4-9. Engine manifolds, exploded view.

( 8 ) Lift manifolds off studs. Remove and

(3) Remove air cleaner (para 4-35).

discard center and end gaskets.

(4) Remove carburetor (para 4-36 b).

(9) Remove screws attaching intake manifold

(5) Slide governor off carburetor mounting

to exhaust manifold. Discard gasket.

studs.

(6) D i s c o n n e c t exhaust pipe from exhaust

Note. Use care when removing intake to exhaust

manifold (para 4-44 b (2).

manifold screws. Constant heating and cooling may have

frozen screws in place. Use a good grade penetrating oil and

( 7 ) Remove assembled intake and exhaust

allow to stand several minutes before attempting removal.

manifolds by removing attaching nuts and washers

Figure 4-9. Engine manifolds, exploded view.

flat within 0.0008 inch. Replace manifold if

b. Cleaning. Soak manifold in SD long enough

warpage is bad enough to be possible source of

to soften crusted deposits. Clean machined surface

leaks. Check for cracks or distortion. Check heat

with flat bladed scraper. Clean bores of passages

control valve for free operation.

with scraper and wire brush, Dry with clean cloths.

c. Inspection. Inspect for warpage at machined

surfaces with straight edge. The surfaces should be