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Overhauling the heat exchanger.
88.
Remove the two screws (1) and remove the strai-
ner housing (2) from the heat exchanger housing
(3). Discard the sealing rings (4) and (5). Then re-
move the four screws in the heat exchanger's co-
ver. Pull out the insert (6) and cover (7) from the
heat exchanger housing. Put the spacer ring (8) in
a safe place. Remove the cover from the insert.
NOTE! Remove the support ring (9) which can re-
main in the bottom of the housing. Remove the
bottom screw (10) on the insert. Discard the cop-
per seal, the O-ring on the insert, the plain pack-
ing and the other sealing rings. Wash and rinse all
parts including the expansion tank. Check that the
insert's channels are free from contamination. Use
compressed air. Change damaged parts. As-
semble the heat exchanger in the opposite order,
see the picture. Use new sealing rings, a new
packing, a new copper washer, support ring and
O-rings.
NOTE! The cover for the seawater strainer is to be
lubricated on the inside. Remove the rubber
washer A and the sealing disc B. Distribute grea-
se evenly with a brush on the inside of the cover.
Then replace the sealing disc and the rubber
washer and screw the cover in position.
Overhaul and inspection of carburetor
89.
Remove the 4 screws (1) and lift off the upper part
of the carburetor.
31
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