Yanmar 1GM10 Shop Manual Download

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CHAPTER FOUR

able containers and dispose of it according
to local regulations. Make sure to wipe up
any spills and cover any containers of anti-
freeze. Keep antifreeze out of the reach of
children and animals.

Open the drain on the underside of the exhaust mani-

fold (Figure 1).
4.

Open the drain on the engine block (Figure 2, typical).

Allow the freshwater section to drain completely.

6. On models equipped with a remote reservoir, discon-
nect the hose to the engine and drain the coolant from the
reservoir. Reconnect the hose.
7. Close the drain plugs.
8.

If refilling the freshwater section, refer to Chapter

Three for the filling procedure.

Seawater cooling section

Refer to the following procedure to drain the seawater

section.

1. Place a suitable container under the drain, if space per-
mits. This will prevent water from draining into the bilge.

NOTE

from the drain, check the

drain to make sure it is not obstructed or
plugged.

2.  Open the drain on the underside of the exhaust mani-
fold end cap (Figure 2).
3.  Allow the  water  to  drain  completely,  then  close  the
drain.
4.  Loosen the cover screws on the seawater pump (Fig-
ure 3) and drain any water in  the pump. If the gasket is

damaged, remove the cover and install a new gasket and
the cover.

Remove the lower end of the cooling system hoses

from the pump and exhaust manifold. Lower the hoses
and allow them to completely drain. Then reconnect the
hoses and clamp securely.

NOTE

It is possible that undrained water may re-
main. Protect the seawater cooling section
by filling it with an antifreeze solution.

FITTING

OUT

Preparing the boat for use after storage is easier if the

engine was properly prepared before storage. Refer to the
list of needed work that was to be performed before re-
turning the engine to service. If there is other work to be

done, determine if the work is easier, and possibly more
economical, if performed before returning the engine to
service.

Remove all covers placed over engine openings during

lay-up.
2. If the seawater cooling system is filled with an anti-
freeze solution, drain the antifreeze from the system using
the draining procedure described for the seawater cooling
system or the procedure for the seawater section if

equipped with a freshwater (closed) cooling system.

3. If left loose during lay-up, tighten the seawater pump

cover screws (Figure 3).
4.  Adjust belt tension for the water pump and alternator
drive belts as described in Chapter Three.
5.  Replace all fuel filters.
6.  If

equipped with a fuel tank drain valve, open the drain

valve and remove any water that may have accumulated in
the tank.

WARNING

Be sure to have a Coast Guard-approved
fire extinguisher on hand whenever working
around fuel.

NOTE

fuel in the fuel tank is dirty, old or con-

taminated with

drain

out the

fuel. Clean the tank and refill with fresh,
clean fuel. Although fuel filters

remove

most contaminants, excessively dirty fuel
may clog the filters or enter the engine,
causing damage.

7. Bleed the fuel system as described in Chapter Seven.
8. Check the battery electrolyte level and fill if necessary.
Make certain the battery has a full charge; recharge if nec-
essary. Clean the battery terminals and install the battery,
making sure the cables are connected properly. Cover the
battery terminals with a light coat of petroleum jelly.

Check the crankcase oil level. Add oil, if necessary. If

the oil was not changed at time of lay-up or if the engine
has been in storage for an extended period of time, change
the oil and oil filter.

10. Move the engine control to the STOP position. Posi-
tion the decompression lever in the ON position. Engage
the starter and crank the engine for 30 seconds. This pro-

cedure will pump engine oil to the engine bearings and
other engine parts.

11.

On engines equipped with a freshwater cooling sys-

tem, check the coolant. If the coolant is contaminated or
has reached its scheduled replacement time, drain, flush
and refill the freshwater cooling system.