Yanmar 4JH3-TCE Specifications download pdf (Page 30)

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6. Periodic Inspections and Maintenance

EN

least every six years (see the table: Peri-

odic Inspections and Maintenance on

page 18.) (Boat hull must be lifted onto a

block.) To replace, consult your Yanmar

dealer.

6.5 When the boat hull is raised

onto a block, inspect the follow-

ing:

(1) Remove deposit from the lower

gear case.

Remove seaweed, seashells, and ma-

rine growth from the lower gear case.

Be sure to remove deposit completely

around the cooling water intake since

the engine may overheat if the intake

amount is insufficient.

(2) Repairing damaged membrane

The membrane of the lower gear case

which is always in seawater may be

damaged when hitting floating objects

in the sea, or when having deposit re-

moved from it. Do not use paint con-

taining copper derivatives.

(3) Inspecting anticorrosive zinc

Since anticorrosive zinc can not be in-

spected except when the boat hull is

raised onto a block, be sure not to for-

get to inspect it.

(4) Inspecting the folding propeller

Inspect whether or not the blade of the

folding propeller opens smoothly. Also

inspect for wear on the blade-fixing

pins. Replace them when wear is ex-

cessive. Apply seawater-proof grease

to the pins blade gear and propeller

shaft.

(5) Draining water

When the boat hull is on a block, drain

the engine cooling water, and the wa-

ter in the Sail-Drive case. (If this water

is not drained, freezing may cause

cracks)

SD50/-4T

A Lower gear case

B Upper gear case

A

B

003874-00

E

A Lower gear case

B Seawater inlet

B

A

003875-00E

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