Yanmar 4JH45 Specifications download pdf (Page 54)

ENGINE OPERATION

48 JH Series Operation Manual

If the Engine Fails to Start

Before pushing the start switch again, be

sure to confirm that the engine has

stopped completely. If an attempt to restart

is made while the engine is running, the

pinion gear of the starter motor will be

damaged.

NOTICE

Never hold for longer than 15 seconds or

the starter motor will overheat.

Never attempt to restart the engine if the

engine has not stopped completely. Pinion

gear and starter motor damage will occur.

Note: Push and hold the start switch

for a maximum of 15 seconds. If

the engine does not start the

first time, wait for about 15

seconds before trying again.

NOTICE

If the vessel is equipped with a water lift

(water lock) muffler, excessive cranking

could cause seawater to enter the

cylinders and damage the engine. If the

engine does not start after cranking for 15

seconds, close the thru-hull water intake

valve to avoid filling the muffler with water.

Crank for 10 seconds at a time until the

engine starts. When the engine does start,

stop the engine immediately and turn off

the power switch. Be sure to re-open the

seacock and restart the engine. Operate

the engine normally.

Air Bleeding the Fuel System After

Starting Failure

If the engine does not start after several

attempts, there may be air in the fuel

system. If air is in the fuel system, fuel

cannot reach the fuel supply pump. Bleed

the air out of the system. See Bleeding the

Fuel System on page 36.

Starting at Low Temperatures

Comply with local environmental

requirements. Use engine heaters to avoid

starting problems and white smoke. Do not

use starting aids.

NOTICE

Never use an engine starting aid such as

ether. Engine damage will result.

To limit white smoke, run the engine at low

speed and under moderate load until the

engine reaches normal operating

temperature. A light load on a cold engine

provides better combustion and faster

engine warm-up than no load.

Avoid running the engine at idling speed

any longer than necessary.

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